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Old 06-25-2009 | 07:56 PM
  #7489  
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RETRO RC
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Joined: Jan 2007
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From: AUCKLAND NEW ZEALAND
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Originally Posted by 2fst2c
Grizz, here's some pics. The pin that is worn came out of the P/S/R set that blew the clip and has under a Gallon on it. I mistakenly said it was a TIN pin but it is not. The other one that blew was but I think I pitched it. I'll look for it and hopefully I can find it. The other pics show a TIN Pin I just took out of my 7 Port that I just finished breaking in. It has about a gallon on it. Changed it out with an OS pin and clips to try and change my luck. It is worn a little but not like the first one. Also the coating comes off as you can see.
Hey 2fst2c,

I really can't understand how they're wearing so quickly I've just measured the wrist pin out of a 3 year old 50+ ltr 7port i just had rebuilt and it only varies by .03 of a mm from 1 side to the other (3.99 to 3.96)

there must be a problem somewhere in the building of the engine or 1 other thing that hasn't been mentioned is the fuel you run.

Also I'm not a hugh fan of ceramic bearings due to the different components having different expansion rates Ie the steel casings expand more that the ceramic balls ...end result a sloppy bearing right from the start

Like I've said before maybe you need to send it to someone to look at for you

Adrian
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