SOHC.co.uk Forums > CB500/550
Crankcases assembled but can't select gears
Sesman:
Is that correct? My original and unmolested 550 F2 had cement that I removed with acetone. Just the merest suggestion of goo, just like on the crank case surfaces, but it was there all the same!
Nurse Julie:
--- Quote from: MrDavo on May 30, 2022, 03:39:30 PM ---
--- Quote ---Do you apply gasket sealant to the big end-bearing joint faces? The ones that house 2, 3 and 4 main bearings?
--- End quote ---
No they should be dry and clean, that's all. My CB750 crank was completely ruined by a previous owner painting the cases all over, including behind the shells. The tolerances are very fine, after painting they were zero or less, ruining the crank and shells.
--- End quote ---
I think you are referring to the outcome of something else Dave. He was asking if he should put Hondabond on all the machined mating surfaces of the crank cases, not just around the main edges of the crank cases.
Nurse Julie:
--- Quote from: Sesman on May 30, 2022, 04:01:59 PM ---Is that correct? My original and unmolested 550 F2 had cement that I removed with acetone. Just the merest suggestion of goo, just like on the crank case surfaces, but it was there all the same!
--- End quote ---
Yes, you are correct.
ebmbiker:
So Hondabond on all mating surfaces?
Cheers, JB
Oddjob:
Before you put the case together have you checked you can select all the gears? And does the cutout in the drum now mate up with the roller on the positive selection mechanism when it's in neutral? It should do or there's something else wrong somewhere.
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