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Piston Rings


cde050583
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Hi All,

Looking to finish the rebuild on my 175cc Bultaco Sherpa T and need some new piston rings. The piston is a MAHLE and is 60.8 in diameter. Measuring the bore a 61mm ring should work but I am struggling to find a UK outlet for such a thing. I have tried the usual In Motion and other specialists but they have nothing listed. 

Also as it has been a while since the strip down could anyone please remind me the correct orientation of the piston. From memory the longer skirt on the piston goes to the inlet side but any confirmation would be appreciated. 

Thanks in advance for any help.

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Try Classic Bultaco for some rings. www.classicbultaco.com. It is the longer piston skirt which goes towards the front of the barrel. On a Mahle there should be an arrow on the top of the piston which points towards the exhaust port.

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On 8/5/2021 at 11:23 AM, cde050583 said:

Hi All,

Looking to finish the rebuild on my 175cc Bultaco Sherpa T and need some new piston rings. The piston is a MAHLE and is 60.8 in diameter. Measuring the bore a 61mm ring should work but I am struggling to find a UK outlet for such a thing. I have tried the usual In Motion and other specialists but they have nothing listed. 

Also as it has been a while since the strip down could anyone please remind me the correct orientation of the piston. From memory the longer skirt on the piston goes to the inlet side but any confirmation would be appreciated. 

Thanks in advance for any help.

Pick up the phone and speak to Dave Renham, if he doesnt have them at in motion im sure he can either source or point you to a genuine ring.

Edited by nigel dabster
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