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piston rings
Posted: Sat Oct 09, 2021 9:27 pm
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
Re: piston rings
Posted: Sun Oct 10, 2021 11:45 am
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/
Re: piston rings
Posted: Sun Oct 10, 2021 12:56 pm
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?
Re: piston rings
Posted: Sun Oct 10, 2021 1:07 pm
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
very good service ordered late afternoon and arrive next day.
Re: piston rings
Posted: Sun Oct 10, 2021 1:41 pm
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
very good service ordered late afternoon and arrive next day.
I've had + 60 in my 55 G3LS since 1986.
Re: piston rings
Posted: Sun Oct 10, 2021 2:10 pm
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
very good service ordered late afternoon and arrive next day.
So you've doubled the budget for this build then!
Re: piston rings
Posted: Sat Oct 16, 2021 8:52 am
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
very good service ordered late afternoon and arrive next day.
Did they pre rust the rings for you Roy?