2009 crf 450 w/ vp u4.2

[madore 127]

2009 crf 450 w/ u4.2

does anyone run it in there 09 does it mess anything up? pump or anything please let me no thanks

[vpmx]

2009 crf 450 w/ u4.2

does anyone run it in there 09 does it mess anything up? pump or anything please let me no thanks

That is all I have ever run in my '09. Runs great and no problems at all. Definitely improves the overall powerband. It is addicting.

As one extra step, I do seal the vents after each ride on the gas cap to keep the remaining fuel fresh instead of draining.

[madore 127]

if fine w/ the pump an stuff? nothing gets sticky

[455]

I wouldn't let it sit in the tank for a long time. If allowed to evaporate the gum could foul the fuel pump.

[vpmx]

if fine w/ the pump an stuff? nothing gets sticky

Never had a problem with the pump or anything getting sticky. VP corrected that issue with 4.2 as the original stuff was nasty on my '07.