OS Piston Pin

[Troy Newman]

Don't have to remove the piston from the wrist pin to get the piston, and con rod out for removal of the crank....Just takes a little patience....Its not like a YS.....it will come apart....Try going to bottom dead center and just slide the con rod back and off the crank pin....Viola its off....Goes back together the same way. Its a little tough but things are sized to allow for the removal of the piston and conrod as a unit. Just like a .46 or the .61's

Its cake after the first time.

I doubt you will ever get the wrist pin out of the motor via the exhaust port....But then again other guys have seemed to do some pretty weird stuff with motors....


  ----- Original Message ----- 
  From: Verne Koester 
  To: NSRCA 
  Sent: Tuesday, July 01, 2003 10:56 PM
  Subject: OS Piston Pin


  Anyone know how to get the piston pin out of an OS 1.4RX? Working through the exhaust port, I got the circlip out but the pin seems to be stuck pretty good. I thought I read where the id of the pin was threaded but it doesn't SEEM like it is. Can't see in there real well but the id feels pretty smooth. I want to replace the rear bearing before the Nats to avoid any possible problems.

  Thanks,
  Verne
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