Supercharger upgraded gears - Kawasaki Ninja H2 Forum
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post #1 of 104 Old 08-15-2015, 12:39 AM Thread Starter
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Supercharger upgraded gears

Ok, who is interested in having our h2's make a few more pounds of boost to increase the fun factor?


I spoke with Don Guhl and inquired about supercharger gearing for more boost.
He said he was looking into it but wasn't sure what interest he would get.


Please post up if your interested.


1. mralbuquerque
2. Somefun
3. Edinir
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post #2 of 104 Old 08-15-2015, 03:38 AM
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I'm interested
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post #3 of 104 Old 08-15-2015, 04:53 AM
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gears seems like a expensive way to upgrade ( i may be entirely wrong but any time i wanted gears cut it was never cheap or simple)
what about fitting a bigger compressor wheel and machining the housing to fit or casting a bigger housing
its a common upgrade on supercharged water craft
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post #4 of 104 Old 08-15-2015, 06:26 AM
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The problem should be if you have more pressure you need more air like the H2r. The top of the engine it s completly different any it have more boost but also more possibility to get the air
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post #5 of 104 Old 08-15-2015, 09:04 AM
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Interested, but with concerns. How much faster will the impeller need to turn to have meaningful gain in boost and will it be reasonably reliable? But yes, interested. Appreciate very much what Don has already done to help us achieve our performance goals.
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post #6 of 104 Old 08-15-2015, 11:53 AM
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I actually did talk to a gear manufacturer about this. And I have new spare gears, chain, and tensioner, for development work. Just a little low on the funds to get it done right now. But if there is enough interest, I might move forward. The more units made, the cheaper it gets.

The big advantage is in the low-mid rpm, imo. Building boost more quickly for critical street/drag operating ranges.
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Last edited by Warp12; 08-15-2015 at 12:00 PM.
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post #7 of 104 Old 08-15-2015, 12:44 PM
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LOL...I think I'll leave mine as is...it's quite 'exciting' right nowYou might,maybe,have airflow issues with just the one intake operating.With that headlamp assembly right there,opening up both ports may be a problem?



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post #8 of 104 Old 08-15-2015, 12:51 PM
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Originally Posted by SilverbirdH2 View Post
LOL...I think I'll leave mine as is...it's quite 'exciting' right nowYou might,maybe,have airflow issues with just the one intake operating.With that headlamp assembly right there,opening up both ports may be a problem?
It's been shown you can spin them to near 14k on the stock gears. So, really, for most street use, all you are doing is bringing up the boost earlier. The time you spend at 13.5k+ is minor, but more boost at lower rpm...you can use that on every ride. Imo.

RPM is cycles of wear. If you can make the same boost/power at 13k as you would at 14k, there is actually a longevity improvement.
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post #9 of 104 Old 08-15-2015, 01:03 PM
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So you mean I'll have to put my KTRC on 3?That's no fun'2' is iffy enough.

Set mine on '2'+...that ruined everything wheelywise.Tried '2'-that wasn't any different than 'KTRC OFF'...WTF?2 seems pretty good...but she still doesn't come back to earth very quickly...she still wants to throw me off.This is not good




Last edited by SilverbirdH2; 08-15-2015 at 01:06 PM.
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post #10 of 104 Old 08-15-2015, 01:08 PM
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"AT BEST collapse your filter"...well,my DNA won't collapse...pretty sure about that.That paper thingy...I could see that?



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