The Great

I went through the whole forum and couldn't get much proper info of how is the re-sleeving of the cylinder done. I tried searching on the internet too and got the basic knowledge that a new sleeve is fitted into the cylinder using the specialized lathe machine.

But in this specific (cylinder) thread i would love if someone who has done sleeving of the engine and throw some light on why it is or isn't recommended.

I have had mixed reactions from people saying that the re sleeved standard cylinder is not at par with the stock std cylinder, performance wise. But i am yet to understand why?

2 Stroke Guru's kindly share the info.

Thanks in advance, Cheers !!

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Noor

Thread approved

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Rxboy

i am also like you and i m not like our xbhp gurus,but i m telling what i had heared.re sleeving is done by putting a sheet of metal according to match the piston size,which you have to give to the lathe operator,so that there should be no even a mm gap between cylinder wall and piston.and that's true the resleeving by local operators cannot match the performance unlike the factory ones,but the difference can be minimum if lathe is handled by an expert and by using right tools.that's why many of us go for fresh cylinder kit.

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yamdoot

Sleeving is a specialised job requiring special machinary as you know. It has to be done in a precise manner to bring the cylinder liner back to company specs. However, we dont have such places who can bring out a quality job . [heck they cant even bore a cylinder properly!]

The new sleeve has to be pressed perfectly straight, the ports should be correctly matched and the sleeve quality should match the original liner. Im sure getting all of these done together is a tough job for an average Lathe guy.
I know just a handful of guys who can perform a good job in India but quality comes at a price.

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The Great

Thank you for approving this thread sir.

So basically if the sleeve is properly fitted then the engine would revert back to Standard? having again re-boring possibilities on the sleeve?

@ Yamdoot, sir since u are a veteran, Have u ever tested a good sleeved bike. What is the real difference in the performance. Is it marginal or substantial.

I believe this subject needs a lot more details since finding a new Cylinder is becoming tougher.

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yamdoot

Yes the difference is substantial. The bike only runs but doesnt run like it should. It overheats too. Have ridden RDs on sleeves and they ran real bad. Have ridden a few on a good sleeve job and they ran like new.

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1985 Yamaha RD350 HT
1989 Race winner Ki-Honda 110
1994 Suzuki Shogun Rally prep.
1997 Yamaha RXG stock
2008 Yamaha FZ

No Cams, No Valves, No Headaches.

The Great

So a good sleeve job is still a good choice given that its properly done?

How much does a good proper sleeve job cost here. An approx figure would confirm that its better to hunt for a new Cylinder kit or not.

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yamdoot

A sleeve job is the only choice if a new cylinder kit is not available or is insanely expensive!

Id say the cost depends but expect it to be about half the cost of a new cylinder.

P.S- If 'here' means Mumbai, then forget about it. They dont even have CNC machines to bore them.

__________________
1985 Yamaha RD350 HT
1989 Race winner Ki-Honda 110
1994 Suzuki Shogun Rally prep.
1997 Yamaha RXG stock
2008 Yamaha FZ

No Cams, No Valves, No Headaches.

The Great

Well if not the only choice i was trying to explore the good or bad side of sleeving.

Since you said its half the cost of a new cylinder, which now a days are indeed insanely priced. I don't want to start a price discussion here about the cylinders. Which is in case of all the parts now as people are starting to stock them and then quoting heavy prices. Anyways that's not the point here.

Still if anyone has done a re-sleeving job kindly share the knowledge here. That would be a great learning curve.

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BigBore

@ Vinay - Try and get hands on a used 1st OS or 2nd OS 4TL10 bore rather than re-sleeving the existing bore..

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