SOHC.co.uk Forums > CB500/550
Piston Rings
Bryanj:
Ken, if yours is a later 500 the 550 cylinders may go straight on, or cheat and bore the 500 to 550 pistons
AshimotoK0:
--- Quote from: Oddjob on June 11, 2020, 11:33:13 PM ---I’ll take them Ash if that’s ok, just add them to the cover for when I pop over. Not knowing what state my barrel liners are after 30 years I was thinking it may finally need a rebore, either that or fit some 550 barrels but that involves widening the crankcase opening IIRC
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Yea that's fine Ken.....I ended the listing.
I also checked out some 3-piece oil ring ---383--- rings and apart from a later style of spring/separator ring as on the CX500 .. they are the same as 500's. They fit the 330 pistons which also fit a 500/4
https://www.ebay.co.uk/itm/143570835008?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649
My friend also has these on eBay.
https://www.ebay.co.uk/itm/Honda-CB500-4-NOS-piston-rings-13021-323-013-first-oversize/153864850256
Trigger:
--- Quote from: Bryanj on June 12, 2020, 05:30:41 AM ---Ken, if yours is a later 500 the 550 cylinders may go straight on, or cheat and bore the 500 to 550 pistons
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By the time you have gone to all that trouble, you may as well put a 550 engine in, if the bike is that far away from std ;)
Bryanj:
Its the 605(592) that standard 500 liners wont do Ken, 61mm nominaly
AshimotoK0:
--- Quote from: Oddjob on June 12, 2020, 03:46:55 PM ---I don't like the 550 engine in a 500 frame Graham. The bigger clutch housing interfered with the rear brake lever, tried it before, didn't like it so went back to the 500. It's far away from standard yes but it's all that era Honda parts, I just prefer to upgrade the stuff Honda should have got right in the beginning ;D ;D
Always thought the 500 liners wouldn't bore out to a 550 piston Bryan. Well not safely anyway. My engine number begins 20249** not exactly sure how that sits in the engine number range.
Not sure if first over will be enough Ash, most likely would be before buying I'd prefer to see and check first, at 3rd over your pretty safe it will clear at that.
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Yes agreed .. I just got away with +0.25
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