Unkle Crusty
XS400 Enthusiast
At first I was going to say it is a good idea to lightly hone the cylinders. But if the hatching pattern is still visible and there is no lip at the top, there may be no need to do so. Other engine builders will also have something to say.
On my my 15hp Yanmar 2 cylinder diesel engine, a set of rings was way too much money. I bought a set for a Volkswagen 4 cylinder engine, for a fraction of the cost.
Others may know of places to buy new rings at less money than Yamaha.
I am riding my 400 often. Still have a WOT issue at 8150 revs, but the bike is quite serviceable and nice to ride.
Unkle Crusty*
On my my 15hp Yanmar 2 cylinder diesel engine, a set of rings was way too much money. I bought a set for a Volkswagen 4 cylinder engine, for a fraction of the cost.
Others may know of places to buy new rings at less money than Yamaha.
I am riding my 400 often. Still have a WOT issue at 8150 revs, but the bike is quite serviceable and nice to ride.
Unkle Crusty*