cc to Hp

Ghanem · Apr 15, 2011

I have 125cc quad how much it is in Hp ???

DCProductions · Apr 15, 2011

12 hp maybe? There isn't a direct correlation between cc and hp, but I think there is a common 125cc engine in most quads that puts out about that much.

slideways · Apr 15, 2011

Most utility engines that size are 3.5-4.5hp. The difference is having a transmission attached to it of some kind to utilize the power.

Briggs 3.5hp Flathead=148cc
Clone 6.5hp OHV=196cc
Honda 13hp GX390=390cc

sideways · Apr 15, 2011

There is no correlation between cc and horse power.

I would suggest your engine would have between 9-14 HP.

More on the subject here.

sideways · Apr 15, 2011

slideways said:
Most utility engines that size are 3.5-4.5hp. The difference is having a transmission attached to it of some kind to utilize the power.

Briggs 3.5hp Flathead=148cc
Clone 6.5hp OHV=196cc
Honda 13hp GX390=390cc

It's a motorbike engine. Much more power than an equivalently sized industrial engine.

Ghanem · Apr 15, 2011

Yes it is a Yamaha grizzly 125 automatic

slideways · Apr 15, 2011

Not sure how it has "much more power" than an industrial engine. The way the power is transmitted to the axle/ground is where all of your comparison will lie.

Cam · Apr 15, 2011

If you didnt have your grizzley, were would ya be!

http://www.youtube.com/watch?v=lXrcEz2vh0I

sideways · Apr 15, 2011

slideways said:
Not sure how it has "much more power" than an industrial engine. The way the power is transmitted to the axle/ground is where all of your comparison will lie.

It has much more power because the engine is a WAY better design, even "advanced" industrial engines like the Honda GX series use technology that was out dated 40 years before Honda started selling it.

For example, a Honda CT200 (which is a old, very unadvanced, slow, gutless, motorbike, probably the least powerful 200cc bike made in recent history) makes 13.5HP compared to a GX200 which makes 6.5HP. I would expect a modern 200cc 4 stroke motorbike to have about twice the CT200s power output.

Cam, you guys have the best ads ever! :roflol:

Bluethunder3320 · Apr 15, 2011

yeah and if cc's related to HP,

how come stock gx200's make 6.5hp,

and add some thick valve springs, take the governor out, blah blah blah and you now have 20 HP WITHOUT CHANGING the cc's.

anderkart · Apr 16, 2011

Ghanem said:
Yes it is a Yamaha grizzly 125 automatic

I searched the net for quite awhile and only learned that Yamaha doesn't publish the H/P rating for this engine. I have no idea why not, but you could try calling/emailing a Yamaha dealer/service-center and asking them.