Thread: KTM rebuild
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Old 05-16-2008, 08:44 AM   #5
bondo
Short Shifter
 
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Join Date: Dec 2005
Location: wrong island, ny
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Quote:
Originally Posted by NYCSTRIPES View Post
What controls the power valve?

The head gasket design is very similar to the TZ50 I have. Personally I wish it was something more substantal than these little o-rings.

Hey Ken,
Centrifugal force and 3 different springs with a screw adjuster. You can adjust the power/exhaust valve to operate any way you'd like. Tune the power so it's just right.

O-rings are simple and it's all you need with relatively low cylinder pressure/heat. I like 'em! If it was a turbo I-4 drag bike, then some nice copper/bronze head gaskets with metal o-rings machined into the block are necessary.
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