herbilious
New Member
Hi, I just bought this carb (https://www.amazon.com/gp/product/B07JWFTKHN/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 ) in hopes of improving performance further. I already have an expansion chamber and high compression head, so this seemed like the next best upgrade. After installing it, the bike would run super lean, it had a high idle even when the screw was all the way out, and it would take a long time before it would return to idle from revving. It had a worse low end than the stock carb did but didn't seem too terrible in the mid to high end, but I didn't feel a performance boost. (I checked for air leaks and I'm pretty sure it's not that). I upped the jet to 80, and that solved the high idle and long return times but it didn't end my issues. On any larger jets I tried (80, 85) the bike would be about the same as the stock carb at the low end, but my top speed would be like 10 mph less than before, and the engine would stop accelerating way earlier along with having a lot less mid power and torque. I'm pretty sure this is a lack of fuel, but I have no larger jets. I checked my fuel line and it's straight, always pointing down into the carb, and I removed the out of tank fuel filter to see if it was the problem but it wasn't. Any ideas?
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