YAMAHA WR450F grey wire mod - free mods wr450 & wr250

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This is detailed video explaining what is grey wire mod and how to do grey wire mod on wr450 and wr250, this mod will allow your wr450f and wr250f to have YZ ignition timing which is essential for wider throttle openings. This is another free mod for your wr450 which you can do yourself for free.
Throttle stop video:    • Yamaha WR450F throttle stop removal m...  

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wr450f grey wire mod