380M rebuild

karl pa · Post by **karl pa** » Sun Apr 16, 2023 5:46 pm

The 380 and the 550 has the same part number for the smaller center muffler baffles, but the larger outer muffler baffles have different numbers.

vulcanman · Post by **vulcanman** » Mon Apr 17, 2023 10:35 am

Many thank .looks like homemade baffles be the option or modified after market ones.

vulcanman · Post by **vulcanman** » Mon May 08, 2023 12:50 pm

Pete has bottom end together with refurbed crank but now has decided on a rebore and new top end set.the exhausts are now near mint and have been well cleaned out with caustic soda.tons of mouse crap and carcasses ! Has no baffles so planning on making them.any chance anyone has dimensions for top and bottom pipes baffles? Many thanks Bob

vulcanman · Post by **vulcanman** » Sat May 20, 2023 2:58 pm

Eve all.Petes barrels came back today for the 380 bored to +.5 but the centre one is cracked top to bottom and another smaller crack 2 inches over.is it scrap ? Is it possible to put a new liner in or better bet buy another barrel ? The place who did the work have a superb reputation so he will phone them Mon as he at work.cant believe they didnt notice it.is it poss it was already hairline cracked ? Any guidance be appreciated

Craig380 · Post by **Craig380** » Thu May 25, 2023 4:20 am

It probably is scrap unfortunately. Can't believe that was missed during the process of chamfering the ports after the bore job.

About 12 years ago I visited PJME in Wolverhampton and asked them about re-lining a damaged 380 cylinder. They said they wouldn't do it, I don't know if that was because they don't have the facilities, or couldn't be arsed. I suppose turning up a new liner and matching all the ports etc is quite an involved job.

Back then it was still relatively easy to source used barrels so I found a decent one and used that. I think that's your best bet.

vulcanman · Post by **vulcanman** » Mon May 29, 2023 10:35 am

Thanks Craig.looks like thats the way then.

dollydog · Post by **dollydog** » Tue May 30, 2023 6:45 am

i did p.m. you about barrels, but no reply

cheers, dd.

vulcanman · Post by **vulcanman** » Fri Jun 02, 2023 3:18 pm

Thanks Ddog and Craig.Pete went back to Boretech .fella who did the boring insisted it wasnt a crack but a mark he made.he said he been doing them for 50 years and a ring would not pick up on it.Pete said he wasnt happy and the fella reluctantly re honed the bore.the crack/mark has all but gone and Pete is happy now.wish i could show you the photos of the bore but cant put them on here.the re build continues

380M rebuild

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