C90 High compression cylinder and piston kit 12V CDI engines

C90 High compression cylinder and piston kit 12V CDI engines
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£86.80 £72.33 ExVAT


Product Code: 5717

C90 race cylinder and piston kit 12V CDI engines

1 x Custom high comp piston kit with rings, pin and clips NOW WITH EXTRA VALVE CUT OUTS

1 x 47mm Cast iron stock cylinder graded to match piston.

1 x Top end gasket set 1.1mm composite head gasket

We have now modified these pistons to work directly with the stock 90 heads and E22 heads saves on the hassle with incorrect cam chain tension.

Piston to valve clearance we haven’t got to alter the pockets for the stock C90 and E22 heads so all good there for stock cams worth checking if you’re using over 7mm lifts.
At the moment piston to valve clearance at 12 degrees before and after is 4mm so safe; you can run them as close as 2mm but no less.
Closet point to the head .70mm using stock 1mm gaskets any less you are at risk with piston to head contact resulting in the top lan failing.

Sadly price is high as these have been air freighted from Japan and we have had to invest in setting up to machine them all.

This is the very last standard pistons we could get..

Product Code5717
ConditionNew
Weight2Kg

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