piston porting, widening ports

Fast Shag

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I just finished porting out my piston because I noticed that @ BDC my transfer ports and exhaust port were covered up a little by piston. I widened up the exhaust port a little as well.
I put everything back together correctly and it fired right up and ran for about 1/4 mile and it died! Didn't get to WOT Checked spark, good, fuel, good, air, I thought it was good. While inspecting magneto, fuel was in case. Checked seal, toasted! Time to change! Not impressed at 250 miles!:eek: Maybe that's why it always ran rough... Got one in the mail and a new magneto as well. PB270074.jpgPB270078.jpg
 
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So I ordered a new magneto and HD CDI. While waiting, I widened up the exhaust and intake ports, raised the exhaust 1mm and lowered intake .5mm. I can't wait to fire this thing up! When I took the pipe off, gas POURED out!!! Supper flooded!
 
Can those crankshaft seals be installed without splitting the cases?

Yes they can, but it is a very difficult process; requiring an extremely steady hand and a specially designed tool (such as a dentists pick) to carefully pry out the seal without either damaging the aluminium of the engine case halves or the crankshaft surface where the seal rubs up against.

All you need is the slightest scratch on the crankshaft surface, and it will act as a rough edged scraper; chewing out the crankshaft seal in a very short time.

From past experience, i no longer bother trying to pick out a crankshaft seal, for if it is leaking, i strip the thing down and reassemble it; replacing any parts as necessary.
 
Yes they can, but it is a very difficult process; requiring an extremely steady hand and a specially designed tool (such as a dentists pick) to carefully pry out the seal without either damaging the aluminium of the engine case halves or the crankshaft surface where the seal rubs up against.

All you need is the slightest scratch on the crankshaft surface, and it will act as a rough edged scraper; chewing out the crankshaft seal in a very short time.

From past experience, i no longer bother trying to pick out a crankshaft seal, for if it is leaking, i strip the thing down and reassemble it; replacing any parts as necessary.

Installing, not removing. I have the same question. Will they just press in around shaft?
 
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