Ok guy I am about to take my gsr apart to take to get bore out so I can fit my Srp pistons with eagle rods my question is if I have to balance the crank or not? I ask because I see a lot of build and the put pistons and rod with out balance the crank thanks for the help guys

 

Balancing involves more then balancing the crank to the bobweight.

A good shop will match the pistons and rods as well . . . it's absolutely worth the time to balance any rotating assembly, especially when it's mixed and matched sets from a catalog.

 

Thank you I would check with the local machine shop how much is

 

My impression is that honda cranks are rarely out of balance. That is probably why you don't see most balance them. Rods and pistons are should be balanced obviously since you are mixing and matching brands as previously stated.

 

get your clutch and flywheel balanced at the same time.My comp clutch 8.8 lbs flywheel was 14 gram out of balance.My oem crank was almost dead on on the machine.

 

I would get everything balances thanks guys

 

We balance cranks on all engines we build. They are close but never perfect and I would say we have to take weight off 98 out of 100 cranks to make them perfect. Pistons and rods are important to balance as well. a gram of weight spinning at 9000rpm makes a big difference. Be careful not to balance the clutch on the crankshaft because you will be stuck with the clutch for life or your engine will be out of balance.