building a Mk 3 engine 150 from junk of several engines , I think I have a set of coniflex bevels ( crowned straight cut gears very hard to see) but can not be sure they all the same set as the friend I got them from may have used the clutch pinion on something else. The engine came with helical ( slight curve to form) gears but the clutch had jammed chipping the clutch bevel, crank bevel and damaging a tooth on the rear pinion and rear crown wheel no damage to the kickstart bevel
I have a set of straight cut mark 2 bevels. Does any one know what you can mix and match and any foolproof of way identifying coniflex gears.
Lots of engines are totally worn out when you strip them so makes buying engines for the bevels a bit of a lottery.
One thought from Steve J later comment; can worn coniflex gears resemble helical profile slightly? helical gears in other applications are very pronounced I am only going on the vague statement in the parts book which is not linked to engine numbers as far as I can see. I may well be looking at worn coniflex gears.
Contact pattern test seems a good idea in my case.