DT125R FORUM

Thanks everyone! That's very useful information for me.

@MadGyver so does that mean 3MB will possibly work on 3BN engine with shorter stroke?
Perhaps the difference on the stroke comes from the connecting rod? Could that 0.7mm difference in stroke cause a significant performance drop?

My barrel still has some life in it although it has been resleeved and sleeve quality doesn't look that good. But I want to buy another one for spare and to play with
It seems it's quite difficult to find a 3BN one.

@SpookDog @markus-w The engine/frame number is 3DD000350, I think it's a Swiss import. Both cylinder and the head are 3BN

Thank you very much for the advice.
So that means I can't simply install a 3MB cylinder on a 3BN engine and I would rather need to replace the crankshaft, connecting rod, cylinder and the head.
Is the piston size same for both 3MB and 3BN?

Hi everyone.
I'm a new DT-R owner and not so knowledged on the topic.
I was wondering whether a 4BL (possibly 3MB0?) cylinder will work on a 88' DTR with 3BN cylinder head and 3BN engine?

The seller says it's 4BL cylinder from '97 bike. Are those cylinders nikasil plated?

I've been offered one at a reasonable price and i'm considering buying it.