Question about Yamaha Motorcycles
They have only ever made 2 sizes and any one working on motors should own both
Posted on Aug 19, 2019
SOURCE: Front sprocket
Hi ........... One tooth less will give you more top speed (if you can pull top revs) but will reduce accelleration. If you go for one tooth less you'll need to tighten the chain and/or remove a link. It's a trade off ............ decide what you want the bike to do.
Posted on Dec 24, 2008
SOURCE: yamaha ybr 125 top speed
Not much to start with here unfortunatly mate. A free flow muffler will help top end speed, change the factory airbox to a K&N style pod air filter, other than that, hugging the tank at top speed :) If you do change these parts, you may also need to increase the main jet size to richen up the mixture for better tuning of the motor with the better flowing parts. This bike has a top speed of 100kmp and produces 10 hp, so you may only expect to get at best less than 1 extra neddy, and perhaps another 5 km/hr.... I suggest upgrading to a bigger machine of you feel the need for speed :)
If its 125's you are into, test drive a Honda CBR 125R 6 speed fuel injected 13.4 horsepower, and good for 120km/hr
Posted on Jul 10, 2009
Both Ronnies and MRCycles have online microfiche available where you can get the part numbers, even order the part. They are both dot coms, so you don't have to look up on Google.
Posted on Sep 14, 2009
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