UK
Valve Stem Seal Set of 4 CVSD-5.0 x 11.0 x 8.0 Solid Rubber
by CitomerxNew from:
£4.64
Shipping:
see website
Prices may incl. VAT *
Last refresh May/21/2019 03:51 PM
Last refresh May/21/2019 03:51 PM
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Can't get through the exhaust gas test with your bicycle It could be due to porous valve stem seals.
The valve stem seal basically has the function of covering the valve shafts with a sufficient lubrication. On the other hand, the engine burns uncleanly and the oil burst increases unnecessarily when oil enters the combustion chamber.
Thanks to a new manufacturing process
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