SOHC.co.uk Forums > Project Board

1971 CB500K0 Resto 3/71 VIN 1000896

<< < (49/54) > >>

AshimotoK0:
On my barrels (no fin damage) One bore  is worn, the other three are OK. There is a slight ridge at the top of the bore (definitely not hard carbon deposit) but its not only at the front (thrust) side but 90° to that too. It's been suggested that I examine the con-rod, wrist (gudgeon) pin  and piston to see if there is evidence of a slightly bent con-rod but I can't detect anything untoward on any of these components. One possibility is that the bore with damage had a broken ring and may have run with it in that state for some time if it did. Any ideas? I am going to measure the ring grooves in the offending piston tonight.

Already got +0.25 piston kits but unsure if it may need more than that now .. the reboring company is investigating.

Anyone got a spare 500 liner that's standard bore either decent or re-borable to +0.25 I can buy, if I end up needing one?

BTW if anyone ever wants a similar 750 liner I have quite a few.

UK Pete:
Ash do you have liners for k0 barrels?
pete

AshimotoK0:

--- Quote from: UK Pete on September 07, 2016, 09:56:19 PM ---Ash do you have liners for k0 barrels?
pete

--- End quote ---

yes the ones that were originally  in my K0

AshimotoK0:
Someone posted this in not so good English on the USA site:-

have you got a hydro Lock..or overfloted cylender at any time.?
..a Loose jet can drovn one cylender ,and vash all lube aut..so it vear faster then the rest
...lean running can do somthing like..and give a blocked piston..vho overloadet the rod(sleigtly bend)..but not broke it/...

My re-traslation of this bit :  A Loose jet can drovn???  one cylinder ,and Wash all lube out ..so it wears faster then the rest.  drovn??  = possibly drain/drown

There may be something in that as the dome on the head and the top of the piston had whitish deposits on them. The other three were normal appearance for a 21k miler.

Looked at piston ring grooves last night and not excessively worn

 Unfortunately, I never got the original carbs with the bike to examine the jets. James ?  any comments?

JamesH:
Ash - have a feeling the carbs were completely gummed up / full of shyte, which is why I supplied a better set to you. Sadly no way to correlate the two. Did you get my message re the 0.75 NOS pistons and rings I have ? Give me a call as I'm at home with Will who's poorly today.

Navigation

[0] Message Index

[#] Next page

[*] Previous page