Apr 1, 2008 · Actually, I had a ported/milled Varner cylinder on my '01 YZ125. It was, hands-down, the fastest 125 I have ever ridden. I pulled good starts at Glen Helen on that bike …

Apr 20, 2014 · A mid/top port job will be exactly what you are looking for. Runs just as well as a stock motor but pulls further than stock with better over rev. That means less shifting!

Apr 13, 2015 · Has any one done any kind of porting or polishing to a 2 stroke cylinder themselves? I only have a Dremel and was wondering if I could do anything at all myself to my …

Nov 20, 2012 · Plan was to do DIY porting or at least match the cylinder to crank cases better. If you have any good advices I am thankful to hear. there below is some red marks what I am …

YZ125 144 Cylinder Conversion | $1250 Our yz144 has pushed the amount of power thought possible out of a yz125. We have hit 45 hp on some builds! Requires case clearance.-Cylinder …

Porting for the following models, according to the specs of Eric Gorr, can be read about in his book "Motocross & Off-Road Performance Handbook ": 1999 - 2004 Yamaha YZ 250 for more …

Dec 17, 2007 · I want to talk to the guy who is actually porting the cylinder. There is a difference because I have personally used or ridden the tuners bikes for comparison. Terry Varners work …

Jan 22, 2019 · Cylinder ports are cleaned, exhaust port is polished, polished cylinder head, cases and cylinder are matched (crank case with epoxy). I have swapped a carburetor to Keihin …

Dec 11, 2023 · Porting - what it actually does. Cylinder porting is where you can make or break the power-band on a 2 stroke engine. The YZ125 has pretty good ports from the factory, but …

Feb 15, 2009 · Don't have any business modifying a motor. They don't know how to jet, adjust timing, or run proper fuel. 2. Run the motor past it's intended service intervals. 3. Expect too …