Question about Yamaha YZ 125 Motorcycles
Generally this is what i do. warm up engine. shut down and count the number of turns to gently seat the mixture screw. jot that info down. Then remove the mixture screw and spring. spray carb cleaner in the hole for the mixture screw, using the straw that comes with the can. this will ensure you have a clear circuit. Replace the mixture screw and spring and set back to original setting. Start engine. now you can adjust mixture. turn in or out to achieve maximum RPMs. blip throttle to make sure there is no flat spot at that setting. if it sounds good then back out the screw 1/8 more to have a slightly rich mixture. That should do it
Posted on Sep 16, 2010
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Posted on Jan 02, 2017
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