I decided see which simple mods could help this Yamaha YZ two stroke the most in order to get him some extra ponies. Aden needed to graduate from an 85 up to a bigger machine, but needed a bike that is easy to handle yet be fast enough to pull him around. Here are six very simple mods that we have done to the YZ in order to get more horsepower, but also keep reliability as well as some money in my bank account. I like that the FMF pipe comes with o-rings already installed and is ready to put on.
will yz 85 cylinder fit on yz 80 engine? | Yahoo Answers
Top 6 Mods To The Yamaha YZ125
Matt Fisher. My son has had little opportunity to ride the YZ he got for his birthday in November, but it's always had a very, very slight bog when snapping the throttle open. The temp had gone up a bit since he first rode it, and the bog got worse as the day wore on. Took the YZ to the track a week later in 90 degree weather, and the bog is much worse. When rolling on the throttle slowly, it will pull fine all the way through the top end.
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