Kawi2strokes.com Forum

Here it is, the Higgspeed dyno curve.

They are really great "touringpipes" with great power in mid range AND they produce 103,8 hp at LOW 7800 rpm.

I love my Higgspeed!!

Below is the jollymoto vs Higgspeed vs stock pipes

Jørgen

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72 H2, 72 H1B, 74 H2, 74 H2 Cafê Racer, 71 F8 Bison

Jorgen,
Wow; 30 HP gain from stock to Jolly Moto.
I'm assuming all things equal for the 3 pipes shown.
How far from stock was the motor?

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There are only two types of motor sport racing:
Nitro and everything else
(Sometimes referred to as fast and slow)

Everything is equal exept jolly had 1 turn on powerjet, Higgspeed 3/4 turn and stock 1/2 turn. That means, only the jollymoto was dialed in incl ignition timings.

Extremely far from stock. Gained 50% from stock cylinders, (they gave 60 rwhp with stock air box incl silencer) and then 50% more again when putting on Jollymoto. What I like the best, is that all this portwork did not mess up mid and low end power using same stock pipes.

38 carbs with powerjet, zeel, ported everything I know of, incl crankcase.

But still have stock heads, so more to gain when John Aylor is finished with my toroidal heads.

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72 H2, 72 H1B, 74 H2, 74 H2 Cafê Racer, 71 F8 Bison

If you like, you can borrow my Lakeland Dencos to test with as well.

That would be great Sverre!

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If it surges, that's normal, upshift.

Very impressive Jorgen!! I'm sertenly not a pro at reading dynosheet's.. But flatspot with the jollys don't look to bad at all?? What's your secret?

Jim and Sverre:

I would really like testing Jims pipes. We'll be in touch Sverre!

And yes, the mid range with Jolly isn't that bad, but it really sucks compared to stock and Higgspeed. But then again, the power produced from the Jollymoto when ON pipe is truly amazing beeing a street pipe. They hit VERY hard.

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72 H2, 72 H1B, 74 H2, 74 H2 Cafê Racer, 71 F8 Bison

Awesome work

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69 H1, 77 KH400, 72 S3, 72 S2, 71 F6, 72 H2, 73 H2, 72 H1, 73, H1, 74 H1, 70 A1, 75 KH250 (2) 73 S2 (2)