Dyno comparison

[leoherrera]

does anyone have a dyno with stock 11.4:1 compression vs a12.5:1 for yfz 450

[Jeremy]

There isn't going to be a huge difference if thats the only change.

[leoherrera]

There isn't going to be a huge difference if thats the only change.

and a hot cam

[leoherrera]

and a hot cam

[leoherrera]

how about dynos with retard cam hot cam and cp piston andgytr pipe on a 450 yfz

[panici33]

You will feel a difference with the cam mod, not sure about the dyno though. You would probably be able to find some dyno numbers on yfzcentral forum or another forum, just have to do some searching.

[CADWELL]

Are you contemplating dropping a WR crank ?

The reason I ask because there are plenty of benefits of rebuilding with this crank. Not only will you gain a full point in compression, but you'll gain 10cc which will make it a true 450.

The YFZ cams are very hard to beat, in fact, they would be the very last mod I'd recommend on a YFZ, even on a full out race motor. Do the cam mod and be done with that.

Spend the money on a Fuel Customs intake instead, the power to cost ratio will be much greater then the Hot Cams.


With the said mods and given you have a good exhaust you should be high 40's with a good amount of torque gained over a 11.4:1 motor. Plus the reliability that comes with a WR crank is greater then the YFZ crank IMO.

The bottom line is you want to put the all the power to the ground, so gearing, tire selection and tire pressure will be key to feel it on the butt dyno.