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Jubilee Pistons

Submitted by kevin_smith1 on Fri, 08/02/2019
Forums
Light Twins

Hi all.

Having no luck with finding a pair of +40 Jubilee pistons,but I do posses one,so if any of you could help me find another,even a bare one i would be most grateful.

 

Submitted by nicholas_clarke on Fri, 08/02/2019

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Hi Kev, Norvil list 40 thou Jubilee pistons at £194.60 a pair complete not sure if they are new old stock or JEP from Australia but a phone call we clarify!

Good luck

Nick 

Submitted by dennis_thompson on Sat, 09/02/2019

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I looked for several months for oversize pistons for my Jubilee without success. NOC shop sold standard pistons at that time, about a year ago, so I bought them and barrel liners and had the barrels re-sleeved and honed. I used a good engineers in Cambridge, Meridian Engine Services to do this. I got my barrel liners from NOC but Meridian said they could supply liners.

Dennis

Thanks for  all of your help will give Norvil a ring.. Also the relining is a option if no other type of piston could not be used, it seems a shame to reline with all that meat left in the cylinders,but if that's the only option,I will go down that route.

I once had a bsa 250 bored out from +60 to take a Triumph piston, and heard of someone using a old car piston when a original one was obsolete. Just a thought.

Kevin

 

 

Submitted by dan_field on Sun, 10/02/2019

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Funnily enough I could only get 1 +60 piston back in the 70s I wanted to rebore the engine after a +40 piston cracked. I ended up with one at 40 and one at 60. I still have the cracked piston!

Submitted by kevin_smith1 on Tue, 12/02/2019

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Dan.

I thought of running the +40 with a +20 if I get  desperate enough. when I bought the bike it only had the one +40. I did not realise the pistons in this size especially are so hard to find.

Cheers  Nick. Tried Norvil. They have +10 and +20s only in stock.

 

 

 

Submitted by nicholas_clarke on Wed, 13/02/2019

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Thanks Kevin, disappointing, and as Dan has found JEP don't seem to list Jubilee pistons anymore.   My only other suggestion is to try Thomas Hamlin Engineering in Bridgwater, Somerset - 01278 422452.   They are a fantastic classic and vintage engine specialists who might just be able to source a set.   Good luck!

Nick 

Submitted by michael_sullivan on Wed, 13/02/2019

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Kevin:

Can you provide the part number of the +040 pistons?

I will check my sources here in California

Mike

Submitted by dan_field on Thu, 14/02/2019

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Agreed Hamlins are very good, the other option is to research what (Triumph?) pistons could be machined to fit ? 

The other option is to phone Bantam john, I think he had a good selection of various pistons?

dan

Submitted by kevin_smith1 on Thu, 14/02/2019

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Thanks To Dan Mike,& Nick for all your suggestions and help. will try Hamlins.

The part no is..AE 15304 underneath this number is 474. that would be great if 

some could be found. I get the impression most over sizes where +10. +20 as listed

in my parts list from 1959.

Good idea about Bantam john as well, find him a bit odd ,but he could be my best bet.

Kevin

 

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