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TuningFork426

Yamaha
Raptor 700 horsepower ?

16 posts in this topic

:bonk: Some lunatic told my friend that the new raptor 700 has 75hp-stock,

is this the biggest pile of crap lie or what ?

Does anyone know the real numbers ?

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I would think, based on drag race results, that the Raptor 700 is about the same as YFZ450's in terms of HP. I think it is the extra weight that slows the Raptor down. Then again, the Raptor isn't a race quad and the YFZ is. :bonk:

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I thought it was atleast 50. I'm quite surprised by only 40hp, the Grizzly 700 is rated at 46.5 hp. There's no way the Grizz would have a stronger motor. It's not like the new Grizz has a completely different engine than the Raptor either, from what I know the Grizz has the Raptor engine, just detuned to be more friendly with the Ultra-Matic Transmission. I just can't see it being the extra weight that makes the Grizz so much slower than the Raptor, but yet it has even more hp, and torque I'd imagine.

Or is it that the Grizzly is measured from the crank and the Raptor at the RW?

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I thought it was atleast 50. I'm quite surprised by only 40hp, the Grizzly 700 is rated at 46.5 hp. There's no way the Grizz would have a stronger motor. It's not like the new Grizz has a completely different engine than the Raptor either, from what I know the Grizz has the Raptor engine, just detuned to be more friendly with the Ultra-Matic Transmission. I just can't see it being the extra weight that makes the Grizz so much slower than the Raptor, but yet it has even more hp, and torque I'd imagine.

Or is it that the Grizzly is measured from the crank and the Raptor at the RW?

i think 40 would be at the wheels

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The Raptor 700R is 40 hp stock. Anyone who thinks that its 75 hp is living in fantasy land.

One possible reason why the Grizz is rated at slightly more power is the tranny. The Grizz has a CVT, which is a much more efficient tranny than a manual tranny.

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"The Grizz has a CVT, which is a much more efficient tranny than a manual tranny."

How is a CVT more efficient than a manual? I would think if anything a CVT would slip a little on the dyno and would be lower if anything. One other question I have is where is the Grizz "Rated" at more HP, is Yamaha rating it? I have never seen any horsepower #'s on Yamaha's web site. Maybe i'm miss/uninformed. :bonk: 40 sounds about right.

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Simple. With a manual tranny the engine rpms going up and down all the time, but with a CVT when you hit it wide-open the clutches keep the engine in the heart of it's powerband.

Also, a CVT tranny always gives you the perfect gear ratio for the given situation. A lot of times with a manual tranny you are somewhat inbetween gears.

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I can only offer racing input and seat of the pants dyno input (I rode many Raptors).........

The 700 Raptor has one of the broadest powerbands of any ATV out there. It pulls well from idle to a decent top end. I think it has the HP and torque of a YFZ but since it carries a lot of extra weight, it's performance suffers. The Raptor's biggest gripe for me is the suspension. The new GYTR version has the reservoir shocks and that helps the ride and the landings.

The Raptor is a little top heavy too and I thing the GYTR suspension might help take away some of that 'tippy' feeling. Most people will be as fast on the trails on either a YFZ or Raptor. On the track, they don't compare and weren't meant to. :bonk:

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Simple. With a manual tranny the engine rpms going up and down all the time, but with a CVT when you hit it wide-open the clutches keep the engine in the heart of it's powerband.

Also, a CVT tranny always gives you the perfect gear ratio for the given situation. A lot of times with a manual tranny you are somewhat inbetween gears.

I don't think this would affect peak hp numbers it may make a better average hp if what you say is true, but peak hp would not be affected by this.

If all your looking at is the peak it doesn't matter if the tranny keeps it in the heart of the powerband longer cause your only looking at a small window where the peak occurs.

My friends Raptor really woke up with exhaust , intake, and tuner.

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Actually the raptor 700 has more HP than the yfz but the trannys are a lot different. The raptor has longer gears than the yfz making the yfz faster on the start. If you pin both quads, in the end the raptor will be about 1 to 2 lengths faster. And the griz and the rap have totally differnt engines. The griz has very low gears to be rugged and climb rocks that the only reason it has more HP. And plus more horse power doesn't actually mean more speed.

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