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# Stock XR600R Horse Power???

## 13 posts in this topic

Does anybody know what the stock horsepower is on an XR600R?

I read that it gets its peak power around 6500 rpm.

And that it produces 35 lbs/ft of torque.

The formula for Horse Power is.....

hp=rpm x torque divided by 5252

So if you do... 6500 x 35 divided by 5252

That = hp=43

That seems like a logical calculation.

Correct me if I'm wrong.

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Yep,seems like youre on it since the torque and h.p. curves in a dyno should always meet or cross at 5200 rpm.go figure.

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so how much does a stock XRL make? and think of this... the 1972 XL250 (4 valve head , SOHC design like today and 248cc) made 18 HP, the 1974 XL-350, 28.

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So your saying that the 600 makes its max torque and horse power at 5200 rpm?

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where do you get your bikes on the dyno? most xr's make peak hp at 5200 i think

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i didnt do mine like that i went to the drag strip and ran mine then used that formula from my time to get mine and it was somewhere around 40 also if i remember right may have been 38 was a while ago and many ago

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HP for a stock/derestricted XR6 was around the 32-33 mark at the rear wheel. Sounds like very little when compared to the 650R, which makes around 46, but there you go.

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I had mine dynoed by a local shop when I first bought it. At the time it was stock, except for the Husky muffler. The dyno came back with 46hp at 6000rpm's. I have opened it up a bit since and now I am at 49hp at 5800rpm's. Not bad for a bike that weighs 282.

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So you had your 600 dynoed and it was 46 hp stock.

Except for a less restrictive muffler it was stock.

Then you dynoed it again and it was 49 hp.

What after-market changes did you make on your bike to make it go from 46hp stock to 49hp?

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So you had your 600 dynoed and it was 46 hp stock.

Except for a less restrictive muffler it was stock.

Then you dynoed it again and it was 49 hp.

What after-market changes did you make on your bike to make it go from 46hp stock to 49hp?

K&N Filter, pulled out the snorkel to the airbox, and rejetted. I cannot say that the muffler is less restrictive because it is stock on another bike. Tried a buddies aftermarket for one ride to see what I thought, but, didn't like the sound, so I went back to the Husky.

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Thanks for the Info.

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SONODROOPY,

Is there any chance you could send me a dyno chart(s) of when you had your XR600 dynoed stock.

Much aprecciated,

Thanks

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I'm only gettin about 40 but (like me) its old and tierd lol