Molotov256
Member
After moving what was once my stronger motor over to a different build for the umpteenth time, I noticed a significant power loss. The motor would idle fine, but it could barely pull me past 5mph or so, and it would lurch and shudder terribly. I ran through everything I could think to do on the exterior of the motor such as replacing gaskets and using RTV sealant or hose clamps anywhere I thought there could be an air leak. It passed the carb cleaner spray test fine - no change in idle speed.
Having exhausted my limited knowledge, I took apart the top end of the engine (thanks to AI.Fisherman's pictorial HT teardown album!), and things aren't looking so great inside. Still, I've never really looked at the inside of an ICE before, so maybe I'm over reacting... There seems to be some noteworthy scoring on the piston and cylinder walls as well as oil/fuel seeping around the head gasket. In retrospect, I remember replacing the head gasket with a metal one from SpookyTooth cycles a summer or two ago, and it looks as though I neglected to use gasket sealer with it... Shame on me. The motor ran like a champ for quite a while, though, so props to the cheap 2-stroke for holding up to the abuse.
Anyhow, pics are attached. I'm curious what the community consensus is regarding the most cost effective solution. Is it possible to repair existing parts? Am I better off replacing the piston and cylinder with new parts? Maybe this is a good opportunity to upgrade damaged parts with performance parts?
Thanks!
Having exhausted my limited knowledge, I took apart the top end of the engine (thanks to AI.Fisherman's pictorial HT teardown album!), and things aren't looking so great inside. Still, I've never really looked at the inside of an ICE before, so maybe I'm over reacting... There seems to be some noteworthy scoring on the piston and cylinder walls as well as oil/fuel seeping around the head gasket. In retrospect, I remember replacing the head gasket with a metal one from SpookyTooth cycles a summer or two ago, and it looks as though I neglected to use gasket sealer with it... Shame on me. The motor ran like a champ for quite a while, though, so props to the cheap 2-stroke for holding up to the abuse.
Anyhow, pics are attached. I'm curious what the community consensus is regarding the most cost effective solution. Is it possible to repair existing parts? Am I better off replacing the piston and cylinder with new parts? Maybe this is a good opportunity to upgrade damaged parts with performance parts?
Thanks!
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