Maintenance & Technical > KX500 Original
KX-500 Compression Release Mod! Easy Starting!!!
Brett:
Why rebuild already, 200 miles is stuff all only 4 or 5 rides. Did you check the ring gap of the old rings. Thinking about it though the wiseco pistons are s**t and collapse readily. You should also measure the piston with a mic as i bet it is now oval the wrong way. Forged pistons of this size have no structural strength compared to a casting. I was even squeesed my old one in a vice to put back into original shape but it was too late though cos i had allready baught a new piston. Don't mean to bag ya but i just will not be convinced. I have to admit though it is good to see the lining hasn't flaked at all, any chance of a photo of piston on side where release valve is?
gowen:
Hmmm. Wiseco is my brand and has been for 15 years and no problems in every bike I've owned. :-)
Kawadougie:
You didn't read my previous post. :o I've been running this piston and ring set for two years now. I ran the compression release for about 200 miles with the old piston before a rebuild. :lol:
Torch654:
Did you realy put a smaller kicker on it? Evertone would think you were superman with a 125 kicker on it hehe.
IridiumRed:
--- Quote from: Brett --- Thinking about it though the wiseco pistons are s**t and collapse readily. You should also measure the piston with a mic as i bet it is now oval the wrong way. Forged pistons of this size have no structural strength compared to a casting.
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Hey, this might be a big piston for a motorcycle, but remember, this would be a SMALL piston for a good sized american V8 (the small block chevy 350 was 4.00x3.48" Bore/stroke - about 100mm by 87mm, if i remember correctly!) And IF you have a motor that will be leaned on hard - raced, nitrous, lots of blower pressure, etc - you should run forged pistons
Its one thing to say that wiseco pistons are crap quality. That may or may not be true, but I dont think you can say that a forged piston of this size has no strength. That doesn't make sense to me. There are forged pistons a lot bigger, they're tough as hell, and there are smaller forged pistons, also tough as hell........
Maybe i'm missing something, but i dont see what would make an 86mm dia forged piston weak - at least by design??
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