Author Topic: NOS Invader "High Performance Mod Kit"  (Read 258 times)

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gixxer6

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NOS Invader "High Performance Mod Kit"
« on: August 16, 2021, 10:47:39 AM »
After searching for years and years I FINALLY found some Invader cylinders that I am certain were actually ported by Kawasaki as part of the kit.  They came with NOS kit pipes  8).  I haven't taken the time to measure them, but at first glance the porting appears to be "light". 

mswyka

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Re: NOS Invader "High Performance Mod Kit"
« Reply #1 on: August 16, 2021, 04:36:37 PM »
Impressive find.  Keep us posted.
Intruders:  1978, 1979, 1981 Custom (Pink)
Invaders:  1980 440, 1980 440 TOC Custom (Green)
Projects:  1980 Invader 340, 1981 Invader 440, 1982 Intruder 440

Interceptor398

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Re: NOS Invader "High Performance Mod Kit"
« Reply #2 on: August 17, 2021, 08:15:05 AM »
Great find!  It will be fun to hear what the results are.

Ameritude

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Re: NOS Invader "High Performance Mod Kit"
« Reply #3 on: August 30, 2021, 01:19:09 PM »
Would be interested in knowing the numbers that those produce compared to the underwhelming aaen numbers

gixxer6

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Re: NOS Invader "High Performance Mod Kit"
« Reply #4 on: August 31, 2021, 09:44:47 AM »
I'm currently running a set on my 81' Invader, I don't have any dyno numbers but I can tell you that my butt dyno says that it's faster.  I suspect it would be very similar to the power a stock 4/6 makes. 

The 81 with the kit pipes and Polaris clutches is noticeably faster than the 4/6 with Aaen pipes I had a few years back.  This had more to do with the clutches than the pipes though.  The Aaen pipes had an extremely narrow power band, that in combination with the stock Kawi clutches and their known issues made it nearly impossible to tune. 

 

Vader

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Re: NOS Invader "High Performance Mod Kit"
« Reply #5 on: October 21, 2021, 04:00:21 PM »
"...the stock Kawi clutches and their known issues..."

Could you enlighten me on those issues so I'll know what to look for when I go through them?
67 Snow Cruiser 207E
79 Invader 440
81 Invader 440
95 EXT 580 Mountain Cat
96 Wildcat 700 Touring
97 Grand Touring SE 700 triple
98 Formula III 600 triple
00 Indy Triumph 600 triple

gixxer6

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Re: NOS Invader "High Performance Mod Kit"
« Reply #6 on: October 21, 2021, 06:54:32 PM »
Itís a relatively poor design, nothing you can do to fix it.  The Kaw clutches work good on a stock sled, but anything more than that they show their weakness.  The Aaen clutch tuning book explains the design.