This is what i would do if i bought another yfz450 and started from oem scratch. I want to share 5 of the best ways i can think of with you to make changes to a yfz450 for peak power across the whole rpm range.

The BEST 5 Ways to Modify Your Yamaha yfz450 Atv For MAX POWER! (Cheap, Free & Expensive!)

Where i buy ALOT of OEM & Aftermarket atv parts! - Rocky Mountain ATV - https://www.rockymountainatvmc.com/?r...

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00:00 Introduction
01:05 mod 1 (exhaust)
03:26 mod 2 ( airbox and tube)
04:49 mod 3 ( zip tie mod / carb/fuel injection power commander)
06:17 mod 4 ( dirtbike cam mod, hotcam , web cam)
07:16 mod 5 ( porting, bigger valves)
09:08 bonus mod!!!