scored piston kawasaki ke125

No.

 

You evil man. We should have told him to use an angle grinder.....

 

Perhaps a belt sander, with 36-grit.

 

Roughly-remembered letter to Trail&Track (1976 or so):

"Dear Sirs;
My friends call me a fuckwit but we still go riding together.
I was trying to increase the power of my <2-stroke trail bike> and my
friends told me that to increase the transfer of mixture from the
crankcase to the cylinder I should bore a hole in the top of the piston.
I did this, but now it won't run at atll. What did I do wrong?"

A: "Your friends are right!"

--
Ivan Reid, Electronic & Computer Engineering, ___ CMS Collaboration,
Brunel University. Ivan.Reid@[brunel.ac.uk|cern.ch] Room 40-1-B12, CERN
GSX600F, RG250WD, DT175MX "You Porsche. Me pass!" DoD #484 JKLO# 003, 005
WP7# 3000 LC Unit #2368 (tinlc) UKMC#00009 BOTAFOT#16 UKRMMA#7 (Hon)
KotPT -- "for stupidity above and beyond the call of duty".

 

Have you never heard of a cylinder hone?

Have you actually measured the your "new" used cylinder with an
internal micrometer to see what the bore diameter is, and measured the
'C' piston to see what its skirt diameter is?

Cylinders will usually come in a standard bore size, but I can see
where production honing tolerances would result in cylinders that were
half a thousandth of an inch undersized, half a thousandth oversize and
nominal bore diameter, and those cylinders might be identified by
letters, and a mechanic would try to select pistons with matching
letters...

Maybe the cylinder you have can just be honed to fit the the piston.

This assumes, of course, that your cylinder has an iron liner. You
can't hone out a cylinder with a chrome or Nikasil bore that is only
PLATED onto the aluminum...

 

I recently purchased my first bike (a total rebuild project ) and the
cylinder and piston are scored. I have found a replacement for the
cylinder, but I noticed that the piston the guy had in there was a 'C'
size where the cylinder was 'A' since this piston is too large for the
cylinder would I be able to sand the scored cylinder down smooth again
with some ultrafine sandpaper, as long as I make it uniform and within
the bore tolerance of the 'A' cylinder?

thx,
I'll probably just lurk on ebay till I find a proper piston anyways, but
just curious

 

<snip>

Krusty, krusty, my old pal.....

Brevity is the soul of wit. A simple "no" would suffice. ;-))

 

I case you haven't figured it out bt now, your friends are your enemy. I
suggest that you drop them and makes some new friends. Other than ruining
the piston, there is no real damage done enless you let the shavings fall
into the engine.

Your friends are your enemy.

rj