Yamaha R1 Forum: YZF-R1 Forums banner
1 - 8 of 8 Posts

· Registered
12 Posts
Discussion Starter · #1 ·
Just installed my factory pro jet kit. The kit came with #20 pilot jets, are they too big?

The bike runs great above 4k but hesitates from 1200-4000 rpm are the pilot jets causing this? Should I put the #15's back in?
1 - 8 of 8 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.