New yamaha 450 most powerfull 450 stock

[Ron Hamp]

This is a new yz450 with a fmf complete system on pump fuel and reprogramed

[TenCrows]

Wow.  Over 50 horsepower across a 4000 RPM spread? 

 

Damn!

[Ron Hamp]

_{not only the best power of anf 450 but also the best over rev of all of them  Yamaha built a real race engine im not sure if this bike will even want cam shafts @ a pro level good fuel a vortextuner so it can be dialed in better and some light port work and a piston would put it into the 60s for hp .}

[TenCrows]

When I first saw the way the intake ports were laid out on the latest YZ450, I knew they had potential, but to have this much power and to still have people say that they have good, non-peaky power, that's impressive.

 

The torque curve barely has a hump it it.  Remarkable. 

[Ron Hamp]

I take it your native or part native like me chipewa

[TenCrows]

My father was Blackfoot, and my mother is White & Crow.  He said he forgave her for both those things. ?

[grayracer513]

Funny stuff.  Your father sounds like my Grandfather, who used to joke about forgiving my Grandmother for being part French. ?

 

Ron, good work as usual.  56-57 real horsepower is a stunning amount for a production 450 MX bike that's rideable.

[gofaster450]

OK so here is a crazy question... so what are the differences that make the 14 that much stronger than the 10-13's? In addition, it sounds as if the 14 doesn't have nearly the dips and peaks throughout the curve that afflicted the 10-13's. I understand that valve size/cam profile have changed but what else?

 

From the sounds of it, the 14 would absolutely stomp my 12 in total and usable HP. What changes can be made to the 10-13's to mimic the power output and type of power the 14's are putting out?

[Ron Hamp]

air cleaner mods helped the 2010 drasticly porting and cams put the power where the current model is  Yamaha basicly built a very good race engine that needs very little to be competive on the national level.

[WYO522]

air cleaner mods helped the 2010 drasticly porting and cams put the power where the current model is  Yamaha basicly built a very good race engine that needs very little to be competive on the national level.

This is good to hear. I have a 2013 450 with a GYTR cnc ported head and cams, and wow what a difference! What air box mod do you recommend?

[Yzflier977]

It'd be interesting to see peak numbers charted out from the various years bikes starting with the 2006 through the current beast.  Just for comparisons sake so the rest of us without the 56 HP 2014 model would be envious

[drtrcr400]

Can you post the chart for the stock pipe so we can see the difference by chance?

[Ron Hamp]

Sorry I did not have the bike here with the stock pipe to dyno im thinking not much difference in top end.