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Author Topic: Kawasaki "Speed Kit" for the F-5?  (Read 1921 times)

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Offline Tahitian_Red

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Kawasaki "Speed Kit" for the F-5?
« on: June 07, 2012, 10:01:06 AM »
Anyone ever install one or race an F-5 with this kit installed?
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The "Factory Novice"
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Offline farmer58za

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Re: Kawasaki "Speed Kit" for the F-5?
« Reply #1 on: June 09, 2012, 06:30:47 AM »
Have you got one??


Quote from: Tahitian_Red on June 07, 2012, 10:01:06 AM
Anyone ever install one or race an F-5 with this kit installed?
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Offline Tahitian_Red

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Re: Kawasaki "Speed Kit" for the F-5?
« Reply #2 on: June 09, 2012, 07:20:03 AM »
No, but I just read a small article on them and wanted to know more.  I've heard of Yamaha GYT Kits and Suzuki Hop-Up Kits, but never anything for Kawasakis.
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The "Factory Novice"
California, USA

'74 Suzuki TM100, '75 Bultaco 250 Pursang, '77 Honda XR75, '77 Suzuki RM125B, '77 Yamaha YZ400D, '79 Honda CR250RZ Moto-X Fox Replica, '83 Honda ME480RD Mugen

Offline JC

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Re: Kawasaki "Speed Kit" for the F-5?
« Reply #3 on: June 09, 2012, 10:06:58 AM »
The only thing I've read about them was in Dirt Bike on their project 350. They reckon it didn't make any/much diff to the power.

Methinks the F5/F9 is actually strangled at the point of inlet to the carb so no matter how much you port it, it doesn't make much diff, at least to top-end. I had an F81M engine for a while & there's not a lot of distance between the carb mouth & the carb cover on those engines, where the air has to do 180deg. Just putting a spacer behind the carb cover may well un-strangle them somewhat, but I never got to try it.

R'race guys get plenty of power without the cover
« Last Edit: June 11, 2012, 08:51:02 AM by JC »
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Offline Lozza

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Re: Kawasaki "Speed Kit" for the F-5?
« Reply #4 on: June 09, 2012, 09:18:03 PM »
The carb only needs 10-20mm clearence, what it does need is access to a large volume of air. The Big Horn should pull a really wide spread of power and still have top end. That more comes from the pipe design.
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Offline farmer58za

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Re: Kawasaki "Speed Kit" for the F-5?
« Reply #5 on: June 10, 2012, 12:05:42 AM »

I have the F5 "Speed kit" manual and an article on hop up of the F5. Send me a email and I'll return email them to you.
Regards
David

Quote from: Tahitian_Red on June 09, 2012, 07:20:03 AM
No, but I just read a small article on them and wanted to know more.  I've heard of Yamaha GYT Kits and Suzuki Hop-Up Kits, but never anything for Kawasakis.

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Dave's not here man
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