SOHC.co.uk Forums > CB500/550

piston kits supplier help please

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Wookster:
Lovely, thanks for your help Trigger!, I have seen John Oldham might have the rings but like you say I need to check the size of the pistons as they are.  There are no markings on them as such ie +0.2 or anything, any idea what the std size piston diameter is and I can go from there, I'm thinking perhaps I could getaway with a hone and new rings as the pistons are pretty good.

Trigger:
There are two sizes listed: 70.50mm with part number 13103-375-003
                                          70.75mm  with part number 13104-375-003
You will have to work out from the engine number which is for your bike.
You said you had a engine builder on this. He/she should have all this information and be able to advise on what is required for a top end re-build.

paul G:
This guy is worth a shout I have had a few bits from them, great service.

http://www.imdpistons.com/

Wookster:
Thanks Trigger,

I did do some searching and came up with 70mm as std, problem is the engine builder if he can’t get hold of the pistons he leaves you to find them so I’m kind of doing this homework and he’ll rebore to suit.  I will have a look at the pistons to see what size they are as well, the engine code is cb500E XXXXXXX, but I’m hoping that I can getaway with just new rings.....well that is the plan anyway!.  I’ll give IMD a call and see what they can do, so thanks for that.

Trigger:
I have been on the Honda Twins forum and the lads say it is not that easy to get hold of piston's for the CB500T any more. Found these in he states:
http://www.ebay.co.uk/itm/1975-1976-Honda-CB500T-CB-500-T-CYLINDER-PISTONS-12100-375-000-13101-375-003/221374073632?_trksid=p2045573.c100033.m2042&_trkparms=aid%3D111000%26algo%3DREC.RVI%26ao%3D1%26asc%3D20131017132637%26meid%3D5971281608730668515%26pid%3D100033%26prg%3D20131017132637%26rk%3D3%26rkt%3D4%26sd%3D261384248410

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