Horsepower ratings?

[Crasherfromwayback]

Cant really compare an old yz250 with his mega $$$ factory 450 tho.... be something seriously wrong if the 250 felt just as fast.

Can't actually compare any 250 stroker to a 450 mate.

[raglanash]

You nutbars will like this. http://www.bikeexif.com/honda-cr500#ixzz1l5TQCsls
Licence wouldn't last long I recon

[SMOKEU]

Can't actually compare any 250 stroker to a 450 mate.

I thought top end power was similar.

[Crasherfromwayback]

I thought top end power was similar.

Not even close.

[Jay GTI]

Not even close.

The '12 Kato 250SX makes approx 50hp peak, the '12 450SX-F makes approx. 53hp peak, so they aren't miles from each other.

But generally, it's around the 50 mark for 250 2Ts, around the 55 mark for 450 4Ts, give or take a model year or two.

[Crasherfromwayback]

The '12 Kato 250SX makes approx 50hp peak, the '12 450SX-F makes approx. 53hp peak, so they aren't miles from each other.

But generally, it's around the 50 mark for 250 2Ts, around the 55 mark for 450 4Ts, give or take a model year or two.

Maybe so...but the numbers are kind to the 250 in the way they feel. As JS said...you think you're flying on the 250, but you're not.

A 450 tapped in the dirt is a near terrifying thing to be on.

[motor_mayhem]

I think with the 2t / 4t debate there are a couple of important points re which is faster

Assuming you're not just wanting to be a straight line warrior..

1. As the weight goes over a point it becomes much less manageable no matter how much more power you're getting.

2. As the engine gets bigger it requires a bigger frame to accommodate it which can also make it harder to ride.


For the 2T fans, IMO the 450 is round about optimum size for 4T for a pro racer (probably closer to 350 for an amateur), being as much power as possible without a weight that's too hard to handle, what would the optimum size cc 2T be (existing measures or otherwise)?

[ktm84mxc]

At the height of the 500 MX GP's in the mid 80's a factory 500 would make 65+ horse power , very few riders were capable of riding these monsters to there limits, Joel Smets 570 KTM wud produce similar power same prob not many could ride it esp a 40 min moto.

[Crasherfromwayback]

esp a 40 min moto.

I can't ride any dirtbike for 40 mins!

[ktm84mxc]

Yes Crasher the term Rock Ape cud apply to the riders of those mighty 500's , the likes of Caroli etc wud just be a flag hanging on to one. Bobrashev and a few of the Belgium riders wud b of similar build to those Gp heroes.
Carlquist was the ultimate rock ape he just beat the bike and track into submission.

[Jay GTI]

Yes Crasher the term Rock Ape cud apply to the riders of those mighty 500's , the likes of Caroli etc wud just be a flag hanging on to one. Bobrashev and a few of the Belgium riders wud b of similar build to those Gp heroes.
Carlquist was the ultimate rock ape he just beat the bike and track into submission.

I remember reading and hearing stories about the huge rocks and crap that the old 500s would chew up and spit out over any poor sap silly enough to follow one closely. Apparently racing them was as much as about being able to handle being beaten up by the roost of the guy in front as much as handling the bike...

[green machine]

Since the topic is horsepower,do you think this one would smoke a 450?,hahahahaha

[Pornstar]

I remember reading and hearing stories about the huge rocks and crap that the old 500s would chew up and spit out over any poor sap silly enough to follow one closely. Apparently racing them was as much as about being able to handle being beaten up by the roost of the guy in front as much as handling the bike...

I have experianced this to a degree, years ago circa 1990 a cr 500 went flying past me on a trail ride,, the rock it launched at me hit my scott lexan lens goggles and smacked the bridge of my nose hard, lexans pretty tough stuff. Respek

[Pornstar]

Since the topic is horsepower,do you think this one would smoke a 450?,hahahahaha

Who? and Why?, really.

[green machine]

Who? and Why?, really.

I don't know,found it on another site.....come on Pornstar where's ya sense of humour.....i thought it was a bit of a laugh...