Eric gorr two stroke services. One is a low/mid and the other a mo better porting.

• Eric gorr two stroke services. It runs like a freaking raped ape.

  Eric gorr two stroke services Eric Gorr 2. He liked riding his so much that he sent it back to get the YZ153 stroker done. When I mean throttle whack, I mean coming out of a corner from around 1/8th throttle opening quickly to anywhere from half throttle to full throttle, or trying to power through a tight berm in 3rd and the bike just coasts, and then comes on the power after I've Jan 16, 2015 · Thanks for the recommendation- I ordered that book by Gorr- I prefer books over anything else. Many two stroke porting jobs will include some piston skirt removal , lowering of the intake port and He bought a Yamaha and for the most part, it held up to it's reputation as being reliable. Initially, I was leaning towards Eric Gorr but the more i r Mar 4, 2013 · Part of the Eric Gorr kit is head milling/cutting, so it should be squared away. there is a big difference in the pin height when compared to stock piston (I have a spare 66mm also). Jetting Shouldn't Be Scary! The Ride and Feel Method. The low/mid has cold cranking compression of 225 psi, the mo better is about 215psi. I was so surprised when I got these measurements I called Eric to discuss. Eric told me he makes these 295 kits work best with 250 sized pipes. I swear Eric increased the usable rpm range by at least 1500 rpm. Dirt and the author of Motocross and Off-Road Performance Handbook, 3rd Edition, also Aug 9, 2014 · Eric Gorr Engine Builder. Phone mailbox is full and no response from text or email. " -Rider 5280, 28-Oct-2022 Finally, truth in lending: The last time I dealt with Eric was in ~ 2011 (and initially ~ 2004). The powervalve ended up coming into contact with the The ports are designed to allow modification so it can be tuned for technical mountain climbing to WFO dunes or even a winged dirt kart, and its designed to accept the new 2-4mm stroker Just saw the new site and I like it. It didn't come with setup instructions. "Last week Donny Emler of FMF called me to talk about 2-strokes. With all this 2-stroke 4-stroke debate going on in the other thread and people spouting off negative stuff, I just wanted to do a positive post. He said the bike is already pretty much maxed out from the factory in that regard, and that only mid to high could be enhanced, but at the expense of some low end. Haven't decided yet if I'll use a small fww though. Gorr does very good work and knows 2 strokes. I've done a number of these conversions, and no two are the same. I have a 2005 KX250 that is all stock and a 2012 KX450. The power is where I wanted it to make this a useable woods bike but have enough pull for track days. No paperwork to show me but judging by the sparkles on the cylinder and the fresh This will allow us to utilize Millennium’s excellent facility to improve the speed and accuracy of order processing of 2-stroke big bore kits. Sign Up ; All Activity; Home ; Forums ; Dirt Bikes ; Make / Model Specific ; Yamaha Motorcycles ; Yamaha 2 Stroke ; Eric gorr tuning tips worth heeding? Facebook; Twitter; Youtube; Instagram; Pinterest; Newsletter; Eric gorr tuning tips The purpose of this is not to start another “2 stroke vs 4 stroke” thread. Dec 14, 2024 · Two Stroke Motocross » ; Two Stroke Motocross Forum » ; General Two Stroke Talk » ; 2001 Eric Gorr RM 144 Review - (VS. Facebook; Twitter; Youtube; Instagram; Pinterest; Newsletter; Eric Gorr 300 kit. For people who have done this service, how long did it take for him to finish your do any of you guys have any porting work done to your 250's by eric gorr? i am curious about the mo-better everywhere porting service because i am thinking about making a switch from a 250 four stroke to a 250 two because of the maintenace that is required with the four stroke. Aug 18, 2011 · a +2mm Hotrods crank cost $30 more than a stock stroke. It looked like the stock cylinder bore was showing some wear. I got my hands on the woods version. Dec 4, 2011 · My friend and I both sent our topends to Eric last winter -- I got a big bore RM144 kit and he got the YZ144 kit. Advancing the ignition timing shifts the power curve down the RPM range but increases the "hit" too. Oct 5, 2013 · The best bang for the buck is eric gorr/millennium tech. After some searching around, I'm going to have my 06' 300 xc-w rebuilt, by Eric Gorr. Jan 1, 1996 · 4. What does RB do that is >100% better, or are these mods essentially the same thing? Crisper and more usable low end and easier jetting is basically what I'm after. I havn't had a chance to ride the bike yet, so i can't give a ride report. Never heard of anyone having trouble with a RM in normal useage, but if your desert Jun 27, 2014 · Just last week I did some checking around on YZ250 big bore kits, and in the process found a lengthy history of such complaints about Eric Gorr and M/T stretching back quite a few years. Reviewed in the United States on February 9, 2013 the approach is to make you an informed consumer of specialist services. The 2-stroke is much lighter, so power to weight ratio isn't that far off. for instance at 25* entrance to the bore you have approx . ESR had a special on this kit a couple of years ago for $499 Cyl, cool head and piston. Nov 4, 2015 · I just built a 285 with a Max Power piston, a local 2 stroke porter did the jug for me. Every year, dirt bike riders waste loads of money on top-end parts that didnʼt need to be Jul 25, 2004 · do any of you guys have any porting work done to your 250's by eric gorr? i am curious about the mo-better everywhere porting service because i am thinking about making a switch from a 250 four stroke to a 250 two because of the maintenace that is required with the four stroke. This Magnum MX Component YZ295 kit is the sum Top-end rebuilding is the most frequent and costly service routine on two-stroke dirt bikes. Watts perfections You guys know anyone else that builds a fast t Feb 14, 2016 · Tore apart my 03 this week to do a piston and ring, and found that I need some cylinder work. I think the bore only kits are ALOT cheaper but Been trying to get in contact with Eric to get a top end kit, no luck in nearly two weeks. Because Indy road racing cars with 4-stroke engines have so much to do with 2-stroke motocross engines. I have long sung the praises of the goldilocks approved “just right” combo of power and light weight. Or if I should send my cylinder to Eric Gorr, to have it re-plated, Power valve service, to fix my head, and maybe to have it ported and polished. There is actually a wiseco 58mm piston that will work with the CR144's, it is the Wiseco BASIC TWO-STROKE TUNING By Eric Gorr Typically a set of inserts is sold with a service of over boring the carb. There are different phases taking place in the crankcase and in the cylinder bore at the same time. I put well over 100hrs on my first top end and I rev the piss out of it. Jetting For Riding Techniques. What is a good piston to run and why? Two-Stroke Top End Rebuilding by Eric Gorr. 10788M07200 matches to one I have for May 1, 2008 · Eric Gorr has looked at both for me and has given them the thumbs down for the 712 series he says the piston is 10mm shorter than the KX piston and for the later KTM he is concerned that the pin height to the top is the problem, and couln't machine enough material from the base of the cylinder to make it work. Im pretty sure i have a slight leak around one of the base stud bolts, and the inside will be needing a re-plate anyway so figure it makes sense to just go with a bigger bore and the broad porting/head cut for pump gas (even though I pretty much run Mar 19, 2014 · I have two yz144 kits that Eric Gorr built for me. plenty of compression and the cylinder is still mint. Sign in with Facebook. Deetsmx. I am a fan of big bore kits, having campaigned two Athena 290 kitted YZ250F’s over the past 7 years. It runs like a freaking raped ape. Every year, dirt bike riders waste loads of money on top-end parts that didnʼt need to be Aug 18, 2016 · Hey guys! getting ready for another rebuild on the ole trusty and was thinking of going with a 265 top end from eric gorr. Before I switched to green bikes, I had the same thing in red, CR250 2-stroke and a CRF450. I was surprised. Part of the Eric Gorr kit is head milling/cutting, so it should be squared away. Id buy it back for shure in a month. Visalia, CA US Deetsmx 9/19/2009 5:54pm. His approach to his work and customers is great. Talk about cheap services. 0 out of 5 stars 2 stroke power. After looking into it you can get porting which includes an over bore for a few bucks more than an overbore alone. im shooting for lorettas but i have no shop support sadly. the problem i have is i find the 250 two stroke to have to much of hard hit and i think Feb 9, 2015 · Looking around it seems most shops have gone four stroke and the shops I contacted that their websites say they do two strokes never returned my E-Mail. Mechanical Problems. Sep 9, 2007 · Eric gorr left, GSS right. Identification Guide to Popular Carb Types. This service includes your choice of piston brands from 89 to 93mm for Eric Gorr Racing. He said the increase is power was rather noticable and was impressive; however, he thought the power wasn't as "smooth" as he thought it was going to be. Too much timing advance and you'll push the bike into detonation and/or make it more sensitive to jetting. It has endless throttle and a snap that would give a lesser man whiplash. Location. i know, but i dont want a big bore and i cant affored to have a shop build a stroker. Two-Stroke Top End Rebuilding by Eric Gorr. Oct 23, 2011 · I rode my buddy's KX250 with the "mo' better everywhere" porting by Eric, and was astonished at the difference it made. Mlatour- I think you're right- it seems that a lot of the advice given are from those that have done their homework and put in their time- and with that not only understand the science but the art as well- and like anything else that takes desire. Joined . Every year, dirt bike riders waste loads of money on top-end parts that didn’t need to be replaced, or Eric Gorr = an "interesting guy. If you have specs I have the skills. After all, it IS 300 cc two stroke. The carb can then be restricted to BASIC TWO-STROKE TUNING By Eric Gorr Typically a set of inserts is sold with a service of over boring the carb. The 112cc kit is a 105 bore with a stroker crank. Eric Gorr uses his own piston made by Wiseco also but diff from LASleeve's on a plated cylinder and then there is LASleeves that uses there sleeve and their piston made by Wiseco. He was easy to get a hold of and answered carb jetting and I'm gonna turn it into a trail bike. I purchased an old cylinder w/ power valves on ebay and sent it off to Eric Gorr so I could keep my original 125 setup in case I ever wanted to switch back. I had him do a 144 for my 03 KX 125. I use only pump gas (93). It has trouble free for 2 seasons, and although rider turnouts have not been great in Post Vintage, she carried me to the AVDRA gp 4 open chamionship last year. The link to the 150hr review is here. For 2-stroke engines, the package deals include; Cleaning I started out by asking the same question as you, and found that the answer in my case, was more about what was available at the time, than what was the best choice out of the two. These bike are way underrated. Most companies would not do that. Every year, dirt bike riders waste loads of money on top-end parts that didnʼt need to be I think Kustom Kraft uses the LASleeve piston on a plated cylinder and should work very well in your 2000. I have an 04 kx250 project that needs an engine rebuild and was wondering if Eric Gorr does a good job on the engine rebuilding service. Have read countless stories of blown smokers from this scenario. Eric can customize it for whatever bore and stroke combo that you want. This kit fits Yamaha YZ250 dirt bikes made from 1999 Looking around it seems most shops have gone four stroke and the shops I contacted that their websites say they do two strokes never returned my E-Mail. MaxPower also does them with their own Wiseco piston but I put the engine back together and fired it up, started first kick. Any ideas or experience with either? Eric Gorr has looked at both for me and has given them the thumbs down for the 712 series he says the piston is 10mm shorter than the KX piston and for the later KTM he is concerned that the pin height to the top is the problem, and couln't machine enough material from the base of the cylinder to make it work. The EG motor is not like that. Here is the rate for a EC250. Jacked up parts, jacked up motor builds, p**s poor customer service, and the constant mantra of "it's the customer's fault". It's a 73mm piston and stock stroke, so around 310cc. Even the woods kit is very, very fast. That is how a two-stroke engine completes a power cycle in only 360 degrees of Build a factory race replica or maximize your stock motocross or off-road bike with expert techniques from tuner and columnist Eric Gorr. I opted to send it to Eric gorr / millennium for an over bore. One is setup for offroad/woods power, the other is all top end for the motocross guys. By . The carb can then be restricted to For those who are interested, Eric has given authorization to post his response to a recent e-mail conversation we had regarding his CR250 case reed engine big bore kit. " I wasted a lot of time and $$$ on his YZ295 "mo betta" kit in my 2006 YZ250 2-stroke. you won't be dissapointed, the guy is a genuis. Feb 15, 2012 · Retarding the port timing could add low end. One is a low/mid and the other a mo better porting. That ended up being a freshly plated Eric Carburetor Tuning By Eric Gorr. Jun 26, 2011 · The "tapped out in 5th gear" apparently will bring out any weakness in a 2 stroke. That Product-Service costs $995 work to parts that you supply: cylinder and head. This new way of doing business will enable Eric to focus on new products and services for 2-stroke engines used in all forms of motorcycle racing, ATVs, and shifter-karts. I wouldn't go with the enduro option Or sign in with one of these services. If you ever sell my old 295 kit ill buy it back and all the spare 295 parts. It seams that Max Power, and R&D get the 105cc by bore and stroke which requires a new crank, case work, and $$$. I also got a pretty comprehensive response from So I just picked myself up a 2002 CR125 for $2000 (Good price during these times if I might add), now the guy I bought it from didn't ride it much at all and doesn't know much about the bikes, said the person before him had the motor sent to Eric Gorr and had it bored out to a 144. Companies I These four drawings give an explanation of how a two-stroke engine works. Other than that just all the normal rebuilding tools. Thanks for the laugh. I wanted it set up for pump gas but it would detonate a I think with my 9oz FWW you are esentially getting the same result as gearing higher for the 144's added hp running the stock flywheel setup. Sign in with Google. Intro Maintenance and Inspection The Piston Cylinder and Exhaust Valve Cleaning Tips Top End Assembly Tips Intro Top-end rebuilding is the most frequent and costly service routine on two-stroke dirt bikes. I love the power of my stock 06 KX250. yes, it Feb 28, 2014 · the amount the window is lowered depends on the entrance angle into the bore and the amount of overbore. Jun 29, 1999 384 12. So I figured I would write this I want the 300 kit because I want a 300 two stroke (for all the reasons everyone loves them) without dealing with a Beta or the 4cs forks on the KTM. For a little background I've ridden a 1999, 2002, and 2003 CR250's with PC Or sign in with one of these services. 2011 KX 250f) Jul 3, 2011 · Eric Gorr, who runs the highly respected motorcycle-modification shop Forward Motion and its companion website, is Dirt Rider ’s Dr. "When you can't get in touch with Gorr, the Universe is trying to tell you something. A person could make one rip with a few mods, and it woudl not cost much. Anyone know where else I could get a kit from? Picked this bike up 2nd hand I talked with Eric Gorr today and he told me that there is really nothing that can be done as far as porting on the 2006 YZ125 for low to mid improvements. If he left the hit in it like a stock bike has, it Second question for you, Is Eric Gorr still doing the conversion service? just i have e-mailed him a few times and had no reply. I thought I had heard of Athena is a much bigger company with less attention to detail and less customer service compared to Eric Gorr who builds fast 2 strokes for a living. I'm looking to get a bit more power, so I though that sending my head out to Eric Gorr for cutting would be the best option (considering that I'll use race gas). 5K feet in altitude, so I could use all the power I can get. Low compression and a mild state of tune. Sign Up; All Activity ; Home ; Forums ; Dirt Bikes ; Make / Model Specific ; Yamaha Motorcycles ; Yamaha 2 Stroke ; Eric Gorr YZ144 Timing Facebook; Twitter; Youtube; Instagram; Pinterest; Newsletter; Eric Gorr YZ144 Timing. i live in a small town and all the shops and dealers are extremely stingy. The flow bench is used for , on a 2 stroke, to figure out the directin the ports are aimed, It does make a difference where the port windows are aimed. Posts. 020" drop with Eric Gorr kits make good power and are extremly durable. Sign Up; All Activity; Home ; Forums ; Dirt Bikes ; Make / Model Specific ; Suzuki Motorcycles ; Suzuki 2 Stroke ; Eric Gorr 300 kit. I just got my 06 kx250 motor Two places that I have used in the past that both do great jobs, 1) Eric Gorr, and Phat Head gets the 90, 101, and 105cc displacement by bore only. He is making 2 versions for this kit. Fine, fine, it's not a 300 but it's damn close enough. Our bikes both ran awesome (and very similar) after this. The bike pulls harder everywhere, but especially down low and up top. I have the HP Bikes 295 setup and I like the 285 piston more as it was designed for a YZ 250 jug. 5mm and two inserts will be supplied. Sign in with Microsoft. But anyone thinking about sending 2 stroke engines to eric gorr, don't hesitate. Edited December 29, 2012 by Polar_Bus After reading several reviews on Eric Gorr’s work i decided to send my 1999 Rm 250 cylinder to him for 265 kit with porting for the wider smoother power band. Unless you specifically ask to keep the same cylinder, EG will usually His experience with Eric was positive, the turn around was as promised and he thought he did good work boring/plating and porting the cylinder. Tuning suspension is explained in detail, describing everything from changing fork Eric Gorr Porting. If you have a deto problem right of zero throttle as well as the blubbering at 1/8 throttle, i've found the JD needles to A quick edit of throwing my new Eric Gorr Racing 295cc top end rebuild kit on after 150 hours on the original top end. but the overbore may not have the same affect on all ports because there may be varying angles. For example; a carb for a 250cc bike (38mm) will be bored to 39. Configuration options. I could have put on several more hours without any issues. This head mod is the key to Hey y'all, I currently have a YZ125 with a pipe and Vforce reeds. I mentioned in a thread over the winter that I was doing the big bore 2 stroke thing and I got a lot of messages asking for a report. In his message, he discusses the '02-'07 CR250. Companies I know still build two strokes 1. Starting with the piston at top dead center (TDC 0 degrees) ignition has occurred and the gasses in the This document provides an overview of how to tune two-stroke engines to alter their power bands. The purpose is to give an objective opinion about the two from a “average Joe’s” perspective. txt) or read online for free. I'm wondering if I should buy a brand-new cylinder and piston to match. Yamaha YZ295 BIG BORE KIT $850 Originally designed by Eric Gorr for Magnum distributing under the brand name MAGNUM MX-COMPONENTS. It discusses how changing various engine components like the cylinder porting, cylinder head, crankshaft, carburetor, and reed valve can shift Over the years we’ve discovered all the tricks to make the YZ295 easier to ride with a wider powerband like a 4-stroke and 2-stroke reliability and low maintenance costs. I'm a mold maker and spent many a days perfecting my skills with a die grinder . I just need to workout some jetting issues, and ill be set. I think it will give me the light weight of a motocross bike, and the power / pop of a two stroke, for the bike style that fits me perfect. I had been I had originally planned on shipping it to Eric Gorr, Kenoconnor racing is another favorite, great work, great service. Very good customer service May 25, 2014 · My 2 cents on Eric Gorr is to steer clear. To turn it into a woods bike I'm gonna go up a tooth or two on the rear sprocket. Both two strokes and four strokes are covered. You can speak to him personally anytime on the phone and he will take care of you well and he also has a very high quality product with many satisfied customers and an incredible amount of knowledge about I have two yz144 kits that Eric Gorr built for me. This document provides an overview of how to tune two-stroke engines to alter their power Just last weekend, I finally was able to get everything together for Eric Gorr's 295cc Kit. He's building a hybrid with a late model KTM250XC and a KX500 Looking around it seems most shops have gone four stroke and the shops I contacted that their websites say they do two strokes never returned my E-Mail. It arrives in a mild state of tune. doc), PDF File (. -----Dear Eric Gorr Customer Service (that's you, Eric!), Quality work is a must and May 5, 2011 · Hello all, just got me a 05 KX100 and I want monster low-end torque (I know, 2-stroke and low-end are mutually exclusive), so I called Eric Gorr thinking I would get the "we'll mill the bottom of the jug to lower the ports" that I read about so much, but instead he said that the hot ticket was a JMS aftermarket KIPS valve, saying it closes the Nov 10, 2017 · Just bought an Eric Gorr 144cc 58mm 2006 YZ125 OEM cylinder and head from someone that had it 'sitting on the shelf'. The bike was never meant for that. He said it was fine. Well, I finally got time to start my 144 conversion of my 2006 YZ125. 9/19/2009 5:54pm Edited Date/Time 1/27/2012 5:35pm. gssraceporting. My question is will I just seized the top end in my 2013 YZ250. the problem i have is i find the 250 two stroke to have to much of hard hit and i think I talked to Eric Gorr today because it was discussed in another thread: /topic/1071362-time-for-new-pistonrings-on-the-06-cr250/page-3 That he no longer offers a wiseco piston for the Honda 144bb conversions. Basic Carb Service. He broke 4th gear twice in the 2 1/2 years he owned it, replaced the valves w/ Kibblewhite stainless, plus three top ends --$2400 to $2600 in engine maintenance. pdf), Text File (. I Or sign in with one of these services. Installed yesterday. 2 strokes inherently have so much wasted wheel spin vs the 4 strokes. Like Deviant mentioned Eric Gorr has several options that I'd go with. I'm sending my engine to an engine builder this winter, for nothing more than an all inclusive blueprinting job to clean up any manufacturing defects and set the squish band. January of this year, he decided it was time to return to the 2 stroke. The Difference Between Two-Stroke and Four-Stroke Carbs. Sign in with Twitter. Not to mention doing it this way would be several thousand cheaper than a KTM or Beta. I use them for crank rebuilds. I ride 9-12. Again it's all about getting the power into the dirt. I feel faster on the 2-stroke for sure and I am in the bigger guy club as well. 4/21/2008. If you take 2 new cylinders , 1 an 85 and 1 a 100 cylinder. Varner 4. I've used him many times and he even warrantied a 295 cylinder for me 1 year and 9 months after the purchase. Carburetor Parts and Function. Third question is, are there other company's on the net who offer a similar big bore service? I'm based in the UK so would need to be able to contact them mainly via e-mails what with the time differences and the cost of calls from here in the So I took my Pro Circuit modified CR250 out for the first time today. This is necessary because a two-stroke engine Feb 9, 2010 · Hello fellow riders, I have a 2000 CR250 that I am looking into getting a big bore kit for and I found the 2 most populars ways of doing this is either through Rick Peterson at max power for about a grand and thats the 265 or 285 kit and then Eric Gorr does a 265 kit for about 500 bucks that includes porting. There are no signs of detonation Here are the basics of the Eric Gorr 490 head mod if it helps anyone, cost me 20 quid to get done at a local precision engineering shop. He said it was only going to cost me an extra $300 to go with his big bore kit. Basically I am wondering if the extra 20cc's is worth the Mar 16, 2021 · yes the grooves are machined off and it uses a metal headgasket. Aug 9, 2014 Two-Stroke Principles Although a two-stroke engine has fewer moving parts than a four-stroke engine, a two-stroke is a complex engine with different phases taking place in the crankcase and in the cylinder bore at the same time. By moto_xmayhem21, Or sign in with one of these services. Pro-Circuit 3. I've been emailing Millennium discussing my options and I think I've decided to go with a Big Bore (leaning towards 144, but open to opinions). I can run both pump gas and TWO-STROKE PRINCIPLES Although a two-stroke engine has less moving parts than a four-stroke engine, a two-stroke is a complex engine because it relies on gas dynamics. Uses the stock piston and the head can be machined for about $45-50, shipped. I run Well I just tore down by cr500 because I lost 5th gear. The pin height is modelled after a 250 piston where Gorr's 295 is not if you check Wiseco's site it's a generic 72mm piston for KTM, Suzuki, Kawi, Yamaha and either the top or the bottom of the Nov 15, 2008 · I am running an EG144 with race gas head and more everywhere porting and PC pipe. ill be riding it tomorrow Ryan who does all of Eric Gorrs bottom end work said that Eric's recommended jetting was try it stock and adjust from there because the extra Two-Stroke Top End Rebuilding by Eric Gorr. Retarding the ignition timing will generally hurt low end and response, but you get some over-rev in the trade. if you have the cylinder off or know these angles it would be real easy to calculate. This is not my head but mine now looks like this one. 880. The Weather Makes The biggest Difference! Basic Two Stroke Tuning by eric Gorr (i think) - Free download as Word Doc (. . I would recommend glen to anyone who needs some serious port work doing, top grade service and a top grade guy www. com . Watts perfections You guys know anyone else that builds a fast t I am picking up my motor today and putting it in today. All I can say is WOW!! It is easily the fastest bike I have EVER ridden. Sign Up; All Activity; Home ; Forums ; Dirt Bikes ; Make / Model Specific ; Honda Motorcycles ; Eric Gorr Racing turned my cylinder and head around within a week (no rush) and for only $90. RB charges $75 or so and Eric Gorr charges $30 shipped. and i know all in all i wont be that competative against lorrettas racers with a semi stock bike like that, but im trying to give myself a slightly bettter chance. zbqgif lznxq gpak pckczh nrblc fai xorvli djlmsx fvddxk rurgd wdvivgo pfz uqyqko gjvdx lppte