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Yamaha MX & Off-Road Dirt Bikes
Help! I blew up two '06 Yamaha YZ125's this past weekend
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[QUOTE="BradC62, post: 1132416, member: 72619"] Motorob, Great choice on the Yamaha 2R @ 32to1. My friends and myself have been using it for 30 years, no problems. Clutch Saver has been very good to us also. The main jet & pilot jet is a whole nother issue with these bikes ( YZ 125 ' 05' 06' 07' ). They are to lean from the factory. Out door summer on a stock bike 430 or 450 , indoor 460 or maybe 470 . But there is also the pilot jet, & needle! My son & I are runing a 490 to 500 main out door summer (hot) and a 500 to 560 indoor (cold) the pilot jet is 37.5 it has never changed ( stock is 40 ). There is a very nice light coco brown on the plug. In order to run these larger mains you have to to some carb mods. What I have come across is the poor mans fuel injection. This bike flys.We have been doing this for 4 years racing even with the smaller bikes , by burning more fuel and oil efficintly it lubes every thing in it's path. The motor run's like a clock. We have done this set-up on a few bikes in the last 5 month's, the riders can not believe the difference. Alot of the bikes new vibrat, the cranks are not balanced that well from the factory, along with the fork seals that leak after only a short while, and also the stopper lever that disenagrates and wipes out the tran's. Keep your eyes open , and yes you are on the right path get that 410 main out! THANK's for the Comp. [/QUOTE]
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Yamaha MX & Off-Road Dirt Bikes
Help! I blew up two '06 Yamaha YZ125's this past weekend
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