Suggestion on throttle body&cam - Page 2 - Yamaha Raptor Forum
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post #11 of 11 (permalink) Old 05-13-2019, 11:42 AM
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Originally Posted by Wko78ms View Post
Sounds like everyone has tried a 50. What specifically was the issue?
If you’ve got a 70hp bike on a 47, you may gain a little bit by going to a 50. But at that point, you’de likely gain more from a 54.

Really the only point of a 50 is to push what you can do on stock valve port, which the 47 already does a great job.

2015 700Rse
Fci, PC5F/I, monster exhaust, +2 Cuervo head, HDD5150, 54mm throttle body, 105.5 14:1, +8 swingarm.
08 yfz450se
Sparks big core, k&n no lid, yz needle, yz timing mod, +4 swingarm.
Cuervo 870, lectron, msd, monster megs, single a-arm lightened chasis, +14 swingarm.
Cuervo 930, lectron, msd, db fab titanium chasis.
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