ltr back fire and shoots fire

[fmfrida07]

i have a 07 ltr 450 and it back fires and shoots fire when at high rpms. i have tride many different thing but none have worked. helppp

[Baracudaaa]

Sounds like you have an exhaust valve hanging up at high RPM's????? Maybe need new springs, valve, and valve guide???? Just my best guess.

[quadbod]

I hope mine spits flames when I get that R6 fired up.

Can't help with your problem though! :blah:

[panici33]

Running a little too rich maybe? Did you just do some mods?

[fmfrida07]

Engine is completely stock.