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Dirt Bike Brands - Other
250f Throttle response
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[QUOTE="Bandit9, post: 671753, member: 33016"] I know the new FCR type carbs can seem intimidating. Really, I know. I actually have never even touched a carb until about a month ago. I just starting reading and researching this bog issue on this site, www.thumperfaq.com, and thumpertalk.com. Seems like just about every single 250F has this off idle bog. I read posts from 2 years back. I read my manual and got familiar with the terminology and stuff. Once you understand what the leak jet is and what it does, you will see that it is no big deal. Totally reversable too. Basically what it does is control the amount of "extra fuel" that the AP squirts into the carb when you twist the throttle. Larger # leak jets leak less fuel hence the smaller diameter hole in the jet. Smaller # leak jets leak more fuel, hence the larger diameter hole in the jet. That is all it does. What is wrong with the 250F is that most of the AP squirts aren't producing enought fuel when we wack the throttle. The #70 isn't big enough and Yamaha doesn't go any lower the that. Just do yourself a favor, go down to your local scooter shop and purchase an $8 #70 leak jet and screw it in the same hole as the stock one you took out. Do not test on the stand. Go ride it for about 10 minutes. Continued below in new post [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
250f Throttle response
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