yfz's exact horsepower?

[Sparky416ex]

what is it does anyone know for sure....yamaha claims 50 i think...but thats not right cuz thats what teh dirtbiek had right?

and what does teh crf450 motor have?

[stupid driver]

im not sure for the yzf, but i heard that a crf quad will pump around 38 to 40 hp at the wheels. My sources may be wrong though

[Sparky416ex]

Originally posted by stupid driver
im not sure for the yzf, but i heard that a crf quad will pump around 38 to 40 hp at the wheels. My sources may be wrong though

whos your source?

[RiPPiNiTuP7]

i heard the yfz450 has around 40hp and the crf has mid 50s....

[Sparky416ex]

i heard they took out 6 horse when they detuned the yfz....they honda willl prolly be about the same

yamaha released there bike too soon to change it in time for ama...ama just changed it to a 450cc limit....honda will have an advantage with that...who else hopes they will have a 450 motor with 50 horse thats good for a quad?

[phatswinn]

i think everyone would like to see a 50hp stock quad

[hondafox440]

I would assume the YFZ is about 47bHP, so that should translate into just over 40HP at the wheels.

A CRF conversion should put closer to 43HP down, since the motor is not detuned.

[Sparky416ex]

Originally posted by hondafox440
I would assume the YFZ is about 47bHP, so that should translate into just over 40HP at the wheels.

A CRF conversion should put closer to 43HP down, since the motor is not detuned.

i love your icon

[XANDADA]

go to the gt thunder website. They have posted dyno runs with both stock and slight mods. With the new exhaust, airbox lid removed, rejetted & timing changed it was at 49hp with a very nice looking power curve I must admit.