Almost none. It raises the rev limiter and thats it. I had a dynaFS on mine for a while because in the newer 400s with reverse it removes the reverse rev limiter which is set factory at like 1000 rpms. But after fighting with tuning the quad and having comstant idle issues and cold and hot start issues i use it as a paper weight now.
1 - 2 of 2 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.
We’re a forum community dedicated to Honda ATV owners & enthusiasts. Come join the discussion about upgrades and reliability for your Rancher, Foreman, Recon, FourTrax, Pioneer, and more!