103 piston problem ?

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Jul 15, 2012 | 10:04 AM

#11

sporacer

Road Master

Joined: May 2008

Posts: 1,196

Likes: 14

From: connecticut

Could be the piston pin loose in the rod bushing. They make more noise when warm then cold.

Jul 15, 2012 | 04:00 PM

#12

62pan

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Joined: Jan 2010

Posts: 81

Likes: 1

From: SE. Michigan

I will be checking all the sizes when I pull it apart, I don't have the tapered end rods, they put the heavier (wider) ends on the forged crank witch is what I have and it's welded at the crank pin too. run-out at the shafts was .0003 pinion side and .0007 primary side. I know that has nothing to do with my noise, just thought I would put that out there. I really took my time and pre checked every component before I assembled it.

Jul 15, 2012 | 04:11 PM

#13

Gliden

Club Member

Joined: Jun 2009

Posts: 5,323

Likes: 37

From: NJ

Bring her in. The clip that holds the piston to the rod could have come off which will then cause that pin to work it's way out and cause a real knocking and slapping sound. Not good if that's what happened. Good luck.