Crank shaft part codes?
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@spookdog sure, but to find pistons that fit my bore you have to buy pre 88 pistons, standard pistons don't fit as the sizes don't match ofcourse you could get the cylinder bored to match the later pistons though If someone is using an early bore size they're likely using an early crank size that's my reasoning anyway
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You see what I’m saying? Your 3mb barrel started of life as a 56mm bore, not a 56.5 (3bn standard bore) the 3mb barrel needs the later 50.7mm crank. Not an early 3bn one...
The crank matches the barrel, not the piston. I just wanted you to get that right
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@spookdog yeah I understand what you're saying but to be truthful I have no idea what crank I've ordered it was literally the cheapest one on eBay that's in working condition so I'll throw it in the cases and if it fits the bearings okay I'll check the squish and see what stroke it is and act accordingly
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Crank came not long ago and test fitted without the engine innards and the play is exactly the same there must be some sort of defect with my main bearings despite them being genuine and only 4 minutes old I can't feel any play in the bearings with the crank out though it's proving to be a tad frustrating
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Removed the crank seal so I can see exactly where the play is coming from its the the crank surface where it presses into the race (as suspected) but the crank fits very tightly into the race has to be pressed in its almost like the race is tapered and I've got it reversed, main bearings aren't tapered at the race are they?
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@markus-w I'm sure it's possible but I'm just not gonna go to the hassle I think either a new crank or just forget about it gambling on used cranks just isn't ideal I gave it a try atleast, gonna get my other bikes built and sorted then I'll circle back round and finish the dt off maybe winter
