For the early aircooled model. Anybody got any ideas as to where there might be some. I can get hold of 50mm (standard) and other sizes, but not 51mm...... must be good quality, Wiseco, Prox et cetera...... Thanks.

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Spencer Racing... www.spencerracing.co.uk

These might be able to help you, helped me in the past.

http://www.boretech.co.uk/index7afb.html?PageID=159

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Farang Bah

Many thanks, will call them later...... I can get any size except the ones I need.....

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Spencer Racing... www.spencerracing.co.uk

Can't you just buy 52's and file them down a bit?

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In a purple fug

Thought about machining them down, but it would take a lot of strength from the ring land.....

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Spencer Racing... www.spencerracing.co.uk

I can get a forged 51 mm piston kit for a rm80, not sure if its only the stroke thats different.
the 80 has a 42mm stroke ?

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Do you want it right or right now ?

80cc 50x42
100cc (99cc) 50x50
Could be the same crown height, peg gap or position,pin size will find out more if you need me to ?

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Do you want it right or right now ?

Thanks Tubbs, the RM80 piston is the same except it has a 12mm gudgeon pin and the RM100/T200 has a 14mm....... I appreciate your thought though.

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Spencer Racing... www.spencerracing.co.uk

Drill?

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08 Specialized Langster

Not possible due to the cast shape of the piston...... all avenues explored.

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Spencer Racing... www.spencerracing.co.uk

Hmm, have you tried:

http://www.govnorsbridge.co.uk (01827 712906)
http://www.granbymotors.net
http://www.robinsonsfoundry.co.uk
http://www.crooks-suzuki.com/index.php?p=1k
http://www.hvccycle.com
http://www.classic-motorcycles.co.uk
http://www.pistonbroke.uk.com (0117 941 2300 - tell Steve his website doesn't work)

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08 Specialized Langster

Most people sell pistons, these are OK for road use, but the race bike revs to 13,000 and the pistons readily available are Taiwanese 'Linsey Doyle and Chork' brand and can't stand the rigours of Terry 'Lack-Lustre' Brocklehurst's right wrist..........

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Spencer Racing... www.spencerracing.co.uk

I called at Thorntons in Shrewsbury yesterday (a proper old fashioned shop where the the counter staff still wear brown coats with a vernier stuck in the top pocket
They have every oversize piston and ring for my 1947 JAP motor (although it has a modified VW Golf piston in it ) but unfortunately nothing that could help you

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If your dreams don't scare you, they are not big enough.

old chap told me if he could not get the next oversize piston he would put a hot piston in a sleeve and bead blast it to size
Not for me i think
454M05100 is the wiseco piston kit part number for 51mm rm100 if you can find stock

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Do you want it right or right now ?

Try http://www.funkmotorsports.com are showing stock

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Do you want it right or right now ?