piston rings

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r wheat
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Joined: Sat Sep 03, 2016 10:47 pm
Location: LINCOLNSHIRE UK

piston rings

Post by r wheat »

Hi i have very good barrel for a 350 matchless but require new set of rings unfortunately it appears on inspection to be 30 plus , i have never seen this size before, can any one tell if replacements do exit. cheers Richard
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Duncan
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Location: HAMPSHIRE UK

Re: piston rings

Post by Duncan »

Hi Richard, yes replacements are available, NOS at autojumbles and auction sites are often in the +0.010 increment intermediate sizes as the majority of pistons appear to be in the +0.020 increments. One of the piston ring suppliers like Cox and Turner should be able to help if you give them the details of the piston.
https://www.coxandturner.co.uk/piston-rings/
SPRIDDLER
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Location: WEST SUSSEX UK

Re: piston rings

Post by SPRIDDLER »

r wheat wrote: Sat Oct 09, 2021 9:27 pm Hi i have very good barrel for a 350 matchless but require new set of rings unfortunately it appears on inspection to be 30 plus , i have never seen this size before, can any one tell if replacements do exit. cheers Richard
Is +30 from your measurement of the cylinder bore or the stamping on the piston?
I poke badgers with spoons.....from 2 metres.
G15 Roy
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Location: ESSEX UK

Re: piston rings

Post by G15 Roy »

Duncan wrote: Sun Oct 10, 2021 11:45 am Hi Richard, yes replacements are available, NOS at autojumbles and auction sites are often in the +0.010 increment intermediate sizes as the majority of pistons appear to be in the +0.020 increments. One of the piston ring suppliers like Cox and Turner should be able to help if you give them the details of the piston.
https://www.coxandturner.co.uk/piston-rings/
I have just fitted a set (twin) plus 60 to my latest re build £84.00 that's the budget all gone for this bike :lol: very good service ordered late afternoon and arrive next day.
Roy
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Rob Harknett
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Joined: Mon Jan 01, 1990 12:00 am
Location: ESSEX UK

Re: piston rings

Post by Rob Harknett »

G15 Roy wrote: Sun Oct 10, 2021 1:07 pm
Duncan wrote: Sun Oct 10, 2021 11:45 am Hi Richard, yes replacements are available, NOS at autojumbles and auction sites are often in the +0.010 increment intermediate sizes as the majority of pistons appear to be in the +0.020 increments. One of the piston ring suppliers like Cox and Turner should be able to help if you give them the details of the piston.
https://www.coxandturner.co.uk/piston-rings/
I have just fitted a set (twin) plus 60 to my latest re build £84.00 that't the budget all gone for this bike :lol: very good service ordered late afternoon and arrive next day.
I've had + 60 in my 55 G3LS since 1986.
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Duncan
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Location: HAMPSHIRE UK

Re: piston rings

Post by Duncan »

G15 Roy wrote: Sun Oct 10, 2021 1:07 pm
Duncan wrote: Sun Oct 10, 2021 11:45 am Hi Richard, yes replacements are available, NOS at autojumbles and auction sites are often in the +0.010 increment intermediate sizes as the majority of pistons appear to be in the +0.020 increments. One of the piston ring suppliers like Cox and Turner should be able to help if you give them the details of the piston.
https://www.coxandturner.co.uk/piston-rings/
I have just fitted a set (twin) plus 60 to my latest re build £84.00 that's the budget all gone for this bike :lol: very good service ordered late afternoon and arrive next day.
So you've doubled the budget for this build then!
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clive
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Location: LONDON UK

Re: piston rings

Post by clive »

G15 Roy wrote: Sun Oct 10, 2021 1:07 pm
Duncan wrote: Sun Oct 10, 2021 11:45 am Hi Richard, yes replacements are available, NOS at autojumbles and auction sites are often in the +0.010 increment intermediate sizes as the majority of pistons appear to be in the +0.020 increments. One of the piston ring suppliers like Cox and Turner should be able to help if you give them the details of the piston.
https://www.coxandturner.co.uk/piston-rings/
I have just fitted a set (twin) plus 60 to my latest re build £84.00 that's the budget all gone for this bike :lol: very good service ordered late afternoon and arrive next day.
Did they pre rust the rings for you Roy?
clive
if it ain't broke don't fix
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