Hi Everyone,
I’ve got myself a R4J Rothmans it’s totally original it even has the Japanese labels inside all the fairings.
The thing is I was doing a top end rebuild with the engine in the frame (got all the parts from CMS – very good – all genuine Honda), but the STUPID nut on the rear cylinder (the one by the RC valve) would not undo and the nut was rounding off so I decided to drop the engine to make life easier.
Anyway the thing is I’ve also got an MC21 engine. The MC18 has 26 km and the MC21 has about 12km. Now I know the bearings & cranks on the MC18 are near on impossible to get and rebuild – so do I put (for peace of mind) the MC21 engine in instead.
I know I will have to change the flywheel and pickups on to the MC21 but because I haven’t got a flywheel puller I’ll probably send the bike and spare engine down to Andy to have the flywheels changed over and have the bike set up and any other issues dealt with before I put it on the road.
So I’m now getting myself in a stew – Do I put the MC18 engine back in & keep it all original and hope the crank & bearings last out or put the MC21 engine in.
What would you chaps do??????? All suggestions considered.
Many thanks.