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Enthusiasts from around the world dedicated to the preservation and ritual flogging of the infamous Kawasaki 2-stroke Triples
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PostPosted: Tue Mar 06, 2012 3:31 pm 
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Joined: Tue Jun 07, 2011 6:37 am
Posts: 10460
Location: Rio Rancho, New Mexico
Here is the "poop" on the RIK/Mitaka pistons. I just got a set in from Reproductiondecals, first over 400.

They came with Riken rings.
The wrist pin is 14 mm instead of the stock 15, but comes with a bearing to make up the difference.
The clips are a strange "G" type.
I haven't checked the rings in the grooves yet.
No directional arrow
The piston edge is approximately 1mm lower than stock.
This takes the compression from 6.5:1 to 6.32:1
Compression goes from stock 143 to 139psi
This adds about 4.4 degrees to the exhaust timing
It adds about 5.5 degrees to the transfer timing

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Twist the throttle, tilt the horizon, and have a great time. What triples are all about...........


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PostPosted: Tue Mar 06, 2012 4:36 pm 

Joined: Wed Jun 22, 2011 1:13 pm
Posts: 49
I thought you wanted forged pistons?


John


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PostPosted: Tue Mar 06, 2012 4:58 pm 
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Joined: Tue Jun 07, 2011 6:37 am
Posts: 10460
Location: Rio Rancho, New Mexico
Wossner Pistons wrote:
I thought you wanted forged pistons?


John


This is for a customers engine......

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Twist the throttle, tilt the horizon, and have a great time. What triples are all about...........


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PostPosted: Tue Mar 06, 2012 9:35 pm 

Joined: Sat Jun 11, 2011 12:32 am
Posts: 215
Location: Melbourne, Australia
Quote:
The clips are a strange "G" type


There are cheap Honda pistons on e-Bay that also have that type of clip. They should be easier to install...

Trevor


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