Mods only for drag racing factors. You can see mine on my signature I'm 150lb with 10psi. 04yfz450 rider 180lb 19" mxr4 rear tires 10psi quad works stage 2 without the outerwear on filter (he says he can feel da difference with it on) lid off had a full big gun exhaust but header had a big hole so he is running with stock headers. Ltr rider 185lb 18" mxr6 rear tires 8psi yosh cherry bomb (lid off no baffle)

The yfz n ltr was power shifting on all races
Yfz hooked up real good in any lane with the 19"

First race me n ltr he messed but I was gone
Next yfz I was on the junk lane n it was up n up all da way n would pass the finish line but in da middle of 5th I would pull away
I was on the good lane I would win by a nose
Good lane again but now I power shifted n pulled on every gear!!!
Went on bad lane n I power shifted but couldn't decide who won
Raced ltr again I was on the bad lane n I power shifted n would pull on all gears no chance next race was the same.

Had good races with the yfz but if the race was longer I would pull away easy

Good to hear the old R giving a beat down.