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Holes in Pistons Anyone?

  • Thread starter Thread starter Skateguy50
  • Start date Start date
S

Skateguy50

Guest
So he didnt start a thread here yet so thought I would pick your brains while Chris tries to see what he can.

http://www.thegsresources.com/_forum/showthread.php?t=147547&page=32

IMGP6812.JPG
 
Pick our brains how? You have to ask a question to get an answer. :)
 
Yea I had one of those on the 550.

For me I was holding the throttle wide open but I had a faulty
petcock which caused the bike to run lean under load.

I cleaned out the sump, replaced the piston and it runs.
I also replaced the petcock.

In my case the cylinder was also lightly scored but I didn't
bother honing it. I should've looked at getting a new set
of low mileage cylinders on e-bay.

The result is that a little oil gets into that cylinder and slowly
fouls it. Not a big deal. Maybe after another 20-30k more miles I'll
strip it down again and replace the cylinders.
 
Yup, I had one like that on a 1000s that had been laid up and not cleaned the carbs properly, but in my case i continued on to my destination another 50 miles (before mobile phones) then put a new piston/rings, cleaned the sump & carbs. bores were fine on mine.
 
last time I saw that, was a 74 RD250 with a kid who didnt know how to set his ignition timing, and also screwed up his fuel mix. showed up at my place, we popped the heads off, BAM there it was. looked just like that one too.
 
RD's are a completly different bag of worms, I knew, still know how to set the timing and I still used to pop a piston every week! NGK didn't do a B10 ES
Every couple of months We would weld a row of them up at work.
Nostalga ain't what it used to be thank God.
I remember the man in the bike shop trying to be helpful telling me that a B8 was a softer plug but if you were a hard rider you would need a B9 My reply was that I would take a B10 fell on deaf ears.
 
I've had a couple snowmobile pistons look like that over the years :)
 
chef1366 said:
There was a Uhaul not too far away. THAT was expensive.
Click to expand...
I know that feeling only too well. :(

We had to rent a U-Haul van in Durango, Colorado to get my wife's bike back to oHIo, back in '04.

To add insult to injury, halfway across Kansas, my Voyager broke, too, so we had to squeeze TWO bikes into that 10' van. :-\\\

.
 
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