Yamaha con-rod weights - (photos added)

Pete_Muller

Moderator
I happened to have some Yamaha con-rods in my shop: some NOS early "lightweight" rods, as well as the current configuration rod (which I would call "medium").

I thought I'd post these weights here in case anyone once to do some math on balance factor.

Obviously, we still need the weights of a lot of other pieces (all the upper end parts, plus the b/e bearing parts). I'll add those onto this thread as I weigh them.
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Medium rod
overall weight: 109.7 grams
big end weight: 66.0 grams
small end weight: 43.7 grams
_______

Early/light rod
overall weight: 91.5 grams
big end weight: 56.3 grams
small end weight: 35.2 grams
_______

Crank pin plugs: 6.0 grams each

Big end cage + 14 rollers + 2 thrust washers: 24.1 grams (for bottom-located con-rod setup)

Wrist pin: 29.7 grams


Will still add circlips, upper end rod bearing, piston and ring soon. That should be the parts required to calculate balance factor.

PM
 
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