10drum
New member
Greetings,
I took the cylinders from my ‘71 r75/5 to a bmw guy to check whether they need to be bored or just honing and rings. He thought they only needed to be honed and install new rings. He also told me that after he hones the cylinder, he rinses them in scalding hot water, blows the outside dry, let’s the cylinder wall develop a thin coating of of rust, then install the piston dry??? He said it’s the best way to get the rings to seat???
Has anyone ever heard of this method?
I was told by british bike guy to assemble the pistons dry with no oil, but never heard of rusting?
I took the cylinders from my ‘71 r75/5 to a bmw guy to check whether they need to be bored or just honing and rings. He thought they only needed to be honed and install new rings. He also told me that after he hones the cylinder, he rinses them in scalding hot water, blows the outside dry, let’s the cylinder wall develop a thin coating of of rust, then install the piston dry??? He said it’s the best way to get the rings to seat???
Has anyone ever heard of this method?
I was told by british bike guy to assemble the pistons dry with no oil, but never heard of rusting?