ninjette.org - View Single Post - 66mm Big Bore + rods. Do I need to rebalance the Crank?

Fred659 · August 23rd, 2023, 11:46 AM

Hi,

Is it necessary to rebalance the 300 crankshaft if I put big pistons (66mm) and Carrillo rods as the crank is 180°?

I guess it would be better, but I try to understand how balancing a 180° crank works.

I can try to match the weights the best I can on the rod ends and pistons.

Can somebody who understand this help me?

Also, Wiseco 66mm piston, rings and pin + clips = 204g and I weighted a 250 one at 168g The Wiseco pins are massive...

does anybody know how much the 300 piston piston, rings and pin + clips weigh?

Can I put the 66mm pistons on the stock connecting rods?

Thanks you.

August 23rd, 2023, 11:46 AM	#1
Fred659 ninjette.org member Name: Frederic Location: Quebec City Join Date: Jan 2020 Motorcycle(s): 08 Race Prepped ZX-10r, 09 Race Prepped Ninja 250 (300 motor). 74 Norton Commando 850 (Project) Posts: 56	66mm Big Bore + rods. Do I need to rebalance the Crank? Hi, Is it necessary to rebalance the 300 crankshaft if I put big pistons (66mm) and Carrillo rods as the crank is 180°? I guess it would be better, but I try to understand how balancing a 180° crank works. I can try to match the weights the best I can on the rod ends and pistons. Can somebody who understand this help me? Also, Wiseco 66mm piston, rings and pin + clips = 204g and I weighted a 250 one at 168g The Wiseco pins are massive... does anybody know how much the 300 piston piston, rings and pin + clips weigh? Can I put the 66mm pistons on the stock connecting rods? Thanks you. Last futzed with by Fred659; August 23rd, 2023 at 02:11 PM. Reason: questions and info added.