ALLY KURWA
L Plate Warrior
Joined: 10 Nov 2009
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Ariel Badger
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Renault 5 Driver
Joined: 18 Feb 2008
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stevo as b4
World Chat Champion
Joined: 17 Jul 2003
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Blue_SV650S
World Chat Champion
Joined: 27 Nov 2008
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 Posted: 16:42 - 10 Nov 2009  Post subject: |
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| stevo as b4 wrote: | Your post is unclear tbh! Do you mean that your cylinder barrel was fitted with a sleeve or liner to replace the damaged Nikasil coating of the original bore surface? |
Yep, presuming what he said, I think you might find 'they all do that sir'.
I was thinking of getting this as a solution to my scored Nikasil, but the bike shop I went to said he has had a couple of these done now and have exactly the problem you are describing. He admitted he might have had an unlucky pair, but also said he wont get any more done now (lets face it, that is understandable). He said he wasn't 100% sure why it was having problems, but suspected it was something to do with the heat transfer of piston and liner. Perhaps that the piston is designed to expand at the same rate as a Nikiasil bore, you put a sleeved liner in there and it has a different expansion rate. Obviously if this is slower .... NIP!!! 
As others have said, check the ports look to be correctly tapered, and it is the correct size piston/ring, but sadly you may well have found a 3rd example to add to this mechanics/shops growing list of 'it just does it' jobs!!  
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