2006年10月1日 · This is a common issue with YZ125's after they get 80-100hrs on them. The PV pin boss fatigues and the press fit is lost. I take the PV's out and drill/tap a 4mm x .07mm hole for a set screw. I grind a small flat on the pin and I tighten the set screw to hold the pin in place.

2018年7月4日 · Many folks are familiar with John Mitchell's exceptional grinding skills when it comes to engines mods!! He did my 2003 YZ125 flat top motor that I podiumed the 1st moto in the 50+ on at LL17 and Clayton Miller 2005 YZ125 that I've ridden for the last 2 years at LL23/ 24 with several top 10 motos and overalls!!

2008年4月1日 · 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 against 250s and 450s. (Well, 426es.) Judging by all the issues that guy has had recently though, I wouldn't send my stuff to him.

2024 Yamaha YZ125 50th Anniversary Edition Bike. Price: $7,299.00. Compare. 2025 KTM 85 SX 17/14 Bike.

2011年1月2日 · TL/DR: Putting a PWK with STIC on a newer YZ125 is not a quick bolt and go proposition. If that is what you desire you may find yourself very frustrated. Long version: Finding a well fitting PWK is no longer a struggle as Keihin now sells the PWK-AG (Air Guide) as an aftermarket carb.

2014年1月5日 · In the final stages of restoring my 97 YZ125. The slide in the carb is pretty worn to the point the majority of the chrome is flaked off the sides. The part is NLA from Yamaha, dosen’t cross reference with any other brands and Carb Parts Warehouse and Sudco said I’m SOL, so it looks like it’s time for a replacement.

2006年9月14日 · I'm looking for the "safe psi range" for both the 2012 YZ125 and 2012 YZ250 compression. I'd like to base my rebuilds on how the compression reads if that's a smart thing to do. Any info/insight is greatly appreciated. Thanks!

2012年10月5日 · Going over the bike today and noticed there was a bit of play in both the front and rear wheels of my 18 YZ125. Anyone know the bearing sizes for both wheels? Plan to get the bearings through my place of work at a considerable discount.

2020年6月29日 · 38mm Keihin carb & STIC Metering block. This will do more than any other mod. I run them on all our two strokes & have a good buddy who tried them on his YZ125. The stock YZ125 with STIC was so much better than his big bore 144 he bought another.....We have had same results on our TC125's stock with carb vs fully built.....

2006年8月17日 · Seeing I have 2 spare sets of wheels for my current old YZ250F, it’s a positive for buying a YZ125 (New, or almost) I was just trying to confirm that the YZ125 hadn’t upgraded to the bigger axles Just a slow old guy trying to have some fun. (They have a 125cc class at my club, so I could double my days racing! - “Vets” and “125 C”.)