I was wondering what makes a bike engine rev so fast? What mechanical parts help or allow the engine to rev at so high rpms? And if thos engines are so powerfull (like current figures on 1000cc around 170-180hp) why don't we see them on cars :lol: ? Is it the weight? Is there any way to make a car rev faster?!?! Just questions...if anyone has answers or ideeas pls replay....

Bike engines can rev pretty high because they are very light and compact, and they probably use special materials as well. That's why they are so expensive (a 1000cc supersport bike costs ~15k euros, and that price is mostly the engine). Apparently cost and size are the reasons they aren't put into cars.

Also most bike engines wouldn't last as long as car engines.

motorcycle engines rev so high because it's just really simple and don't have alot of parts.

Yeah you're both right.

wouldnt a bike engine have a lesser stroke too???
an engine compartment in a bike isnt that big...so mebbe there's little stroke...
and thats also probably why it makes so much hp...because it revs so high...
but then thats why you probably cant put it in a car...the higher the revving...the lower the torque...

well the main difference is that bike engines are dobule stroke (or two stroke, don't know how it is in english) and car engines are four stroke. This is something completely different then car engines. Bike engines are much lighter, have stronger materials, pretty low displacement but newes ducatti from super gp have about 225 hp...
I was wondering how it would be to put such an engine into a normal car and make it go to 15000 rev/minute... It would be a nice feature :twisted:

There are lots of minor differences but its not because they have less parts. They have the same parts just more compact. They rev high because most of them are oversquare (meaning bore is larger then stroke). With tiny little distances to cover on each stroke it makes it easy to rev em high. Also most motorcycles are not 2 stroke, they're 4 stroke. I wouldnt say the higher the revving the less the torque either. But yes in general bike engines have very little torque (CBR600F2 92hp 45ft lbs), but take it from someone whose been riding a LOOOONNNG time. There is nothing like blasting off 0-60 passes in 2.5 seconds, or racing some dumbass in pretty much any stock car and watching him go backwards in your mirror like he was shot out of a high powered rifle. :D

not pretty much every stock car. Every stock car you'd blow away. Kawasaki's $3,000 250R can out accelerate anything up to a 911 turbo. Even my dad's old suzuki 750, which was more of cruiser bike than sport bikes, totally pounced the corvettes of the day.

yeh thats pretty sad lol :lol: :lol: :lol:

I wouldn't say that bike engines have low torque. I mean comparatively. A 1000cc bike engine has more torque than a 1000cc car engine!
And anyway you don't really need much torque, best supersport bikes weight ~170kg. :P

boy thats a scary thought. Super bikes have the same power to weight ratio as like and F1 car with 100 more hp.

not pretty much every stock car. Every stock car you'd blow away. Kawasaki's $3,000 250R can out accelerate anything up to a 911 turbo. Even my dad's old suzuki 750, which was more of cruiser bike than sport bikes, totally pounced the corvettes of the day.

Thats not entirely true. We're talking bike engines in general not just sportbikes. Even then a 250R wont beat a stock viper in the 1/4, although the EX250 is a fun little bike and great for begginers. So no , not every stock car. Btw older GS750's and GS1000's (especially Wes Cooley editions) were awesome bikes. Same with CB900F's and KZ900/1000 's.