If it ever had a rebuild it has not been very good... looks like the nicosil plating have come off in areas and even the head looks pretty bad!
Must have been very lean or not assemblied correct.
I know for a fact that the oil mix was good.
I'm aware that the MC21 engine won't fit, as the MC16 is mounted directly to the frame, but I will need at least one "new" cylinder and as far as I understand the cylinders will fit straight on the MC16 crankcase.
That will also be an performance upgrade I believe and already have a set of MC18 carbs to put on it.
I'm sure the engine was already bad when I picked it up, as I wrote tickover was not good and I had problems after no more than 30 miles.
Of course the damage are now much worse, but I had no other option than to drive it the 500 miles home...
I will be looking for spare cylinders (preferable MC18/MC21/MC28).
Will also go for premix and get rid of the oil pump!
Be aware that I'll be bidding on the MC21 engine on Ebay
