I'm going to get my pistons & con rods balanced as part of my 750 MC locost build. What tolerances should I look for in balancing?

Currently they look like:

Pistons
- lightest approx 640g
- no.2 +0.5g
- no.3 +0.75g
- no.4 +1.0g

Con rods
- lighest approx 660g
- no.2 +1.5g
- no.3 +3g
- no.4 +5g

cheers
RJ

See:

http://www.diynet.com/diy/ar_replica_car_kits/article/0,2021,DIY_13707_2272192,00.html

Check the regs properly first !! there is a max number of conrod and pistons that can be machined for balancing, I think it is three of each !! but I'm not too sure so have a good read !!

Jason

Thanks - I looked at the website, but didn't see any information on tolerances to look for when adjusting the weights to be the same. I was hoping to know if a +1g difference between pistons was within acceptable tolerance for a race x-flow 1300.

I assume +5g on a con rod isn't within tolerance, but don't know what would be.

Thanks also for the 750MC regs comment - absolutely right you're only allowed to balance 3 pistons and con rods, so I (or the engine builder to be more accurate) will pick the lightest and reduce the other 3 to the same weight.

RJ