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Quote from: Nurse Julie on June 29, 2018, 08:12:30 AMQuote from: Doom64 on June 29, 2018, 12:38:21 AMWhen you first started the bike after the rebuild did it have any rattles? When the revs drop the rattle gets worse does this point to the primary chain?I would of replaced the primary chain while it was apart but because it was quiter before the rebuild I thought it was OK, wasn't expecting it to go loud. Would the higher compression make a rattle louder or would it make no difference?Nope, first start up after rebuild it didn't have any rattles at all. My old primary chain had about 5k life left in it but only had a very minimal chain rattle at low revs. No idea if higher compression would make the chain rattle louder but logic tells me it shouldn't make a difference.Hard to equate your engine with his though Julie, yours was a full engine apart strip with all the chains etc replaced IIRC, his has reused all the chains and that's where most if not all of the noise comes from.Higher compression shouldn't alter the engine BUT if the engine wasn't running well on the old bores then fixing that problem would mean the engine balance would change, so carbs etc would be out, causing more noise as it's now unbalanced.
Quote from: Doom64 on June 29, 2018, 12:38:21 AMWhen you first started the bike after the rebuild did it have any rattles? When the revs drop the rattle gets worse does this point to the primary chain?I would of replaced the primary chain while it was apart but because it was quiter before the rebuild I thought it was OK, wasn't expecting it to go loud. Would the higher compression make a rattle louder or would it make no difference?Nope, first start up after rebuild it didn't have any rattles at all. My old primary chain had about 5k life left in it but only had a very minimal chain rattle at low revs. No idea if higher compression would make the chain rattle louder but logic tells me it shouldn't make a difference.
When you first started the bike after the rebuild did it have any rattles? When the revs drop the rattle gets worse does this point to the primary chain?I would of replaced the primary chain while it was apart but because it was quiter before the rebuild I thought it was OK, wasn't expecting it to go loud. Would the higher compression make a rattle louder or would it make no difference?
I dyno tested it before I put the big bore kit in it. Everything was standard apart from a shorter silencer and electronic ignition.
Someone else done it before and said it was within spec. I balanced the carbs again today, took it for a spin and it does seem a lot quiter than it was before, it's back to how it was with the standard kit in it thankfully. I will probably strip it down again winter time and do the bottom end, this was the first engine work I have done and the bottom end is a bit trickier isn't it?