Oh dear.. please enlighten this twin novice.
Have I done a novice error???
I had started to remove primary/clutch/gearbox on my 1957 BSA A10 GF.
In the middle of this I decided to put it together without removing the gearbox.
In the process I swapped to a 4-spring clutch I had on the shelf.
After tighten it all together except for the outer primary cover I decided to start it and test ride it with the used 4-spring clutch that only has 4 friction plates (for a smaller cc Triumph or a 350cc B31). The intention was to see if it takes the force from this 650cc.
This is now when the strange thing occurred suddenly I could not turn the engine around.
I thought it might be the clutch that could be to tight but after removing the cush drive and primary chain I noticed its the engine.
I can turn the engine either a bit forward or backward but it suddenly says "Clunk" and dead stops, I did try to move the bike when assembled back and fourth so obviasly I have put it under a good Manual
The engine ran without trouble before disambling as it was the gearbox that behaved a bit strange as i had difficult to put in neutral when I rode it.
OK when disambling I moved the engine crank shaft back and forward manually and also felt the end play which seems ok but I have not actually meassured it.
Doing that could I have gotten the pushrods to jump out off its position? is it bad to turn the crankshaft backwards???
somehow i feels like the camshaft is getting stuck HOWEVER I'm not sure.
It could be anything else but this is what I experience right now.
Please enlighten me if you can.