Fitting new piston rings...

[andym]

... I want to try fitting new piston ring(s) on my 50cc scooter, but I've never stripped an engine down, but since it is a 2 stroke there shouldn't be anything in there that can cause too many problems is there?

The question is do I need to buy piston rings specific for my scooter or are they just a standard size? It seems that everything for this scooter is strange sizes and there is only one place in the UK I've found that sells parts.

Is there anything I should watch out for? How long should it realistically take? Any advice would be appreciated.

[JackDaniels]

What bike is it ?
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THEORY TEST - PASSED! - 02-08-11 CBT Passed - 09-08-10 MOD 1 - 09-08-2011 - MOD 2 - 28-09-2011
2006 Yamaha JOGRR>2010 Yamaha Ybr>1995 Honda CB400 Superfour >2005 Honda hornet>1999 Suzuki Bandit 1200 > 2002 BMW R1150GS > 2013 Tiger Sport 1050 > 2007 GSXR 1000 > 2005 GS500E

[GREENI3]

Tbh it would help if you told us what ped you've got

[andym]

sorry, I thought they would be standard on a 50cc

it's a Moto Roma Wasp, when I went to get a new exhaust I was told it was a minarelli vert engine?

[JackDaniels]

I just did a rebuild on my 2006 Yamaha Jog it was quite simple just remove the head and barrel, then carefully remove the circlip ensuring it dosent drop inside the engine, new piston on (arrow facing exhaust port) gudgeon pin in circlips in, piston rings on, slowly lower barrel back onto bike ensureing the gaskets line up, put a bit of oil in and rub around with your finger, head back on (with gasket) JOB DONE!

I normally rasie my float needle slightly after a rebuild so it runs a little richer whilsting being run in.
____________________
THEORY TEST - PASSED! - 02-08-11 CBT Passed - 09-08-10 MOD 1 - 09-08-2011 - MOD 2 - 28-09-2011
2006 Yamaha JOGRR>2010 Yamaha Ybr>1995 Honda CB400 Superfour >2005 Honda hornet>1999 Suzuki Bandit 1200 > 2002 BMW R1150GS > 2013 Tiger Sport 1050 > 2007 GSXR 1000 > 2005 GS500E

[hmmmnz]

not all 50cc engines are the same,
they can vary the bore and stroke quite alot,
so you can't just buy a set of 50cc rings and assume it would fit,
also there is a couple of methods of stopping the rings from spinning,
the difference to the ring is difference, and then there is the thickness of the rings as well


ask this guy on ebay
or this guy

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