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Old 03-31-2011, 08:47 PM
Big Maico 393's Avatar
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Default Engine builders

     

You all know that I have a Maico 490 & support about 10 other guy's with Maico's.

So here's my question. I'm getting my cylinder to 4th over & I only have 5th left after this one. a new oem sleeve is about $250, but then I'll have to go trough the same thing by re-boring the sleeve every time it gets worn.

There is only .003 allowed ware & it doesn't take long it seems.

Is there way that I can slow down the ware process? maybe a aluminum sleeve & have it plated or some type of coating on the piston or sleeve?

I was speaking with the guy that bores my cylinders & he is experimenting with type of silicon-carbide impregnation of the bore, but he said that you have to run an old piston first so you don't ware out the race piston?

Let hear you ideas for making my top end last more then one to one & a half seasons.
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Old 03-31-2011, 08:51 PM
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if you have an option to get an aluminum sleeve and get it plated, and have the $$$ to do so, DO IT. plating lasts a long time and will deffinatly slow down the wear process unlike the regular steel sleeve does. also, what kinda piston are you running? wiseco? prox?
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Old 04-01-2011, 04:43 AM
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Quote:
Originally Posted by supercr125 View Post
if you have an option to get an aluminum sleeve and get it plated, and have the $$$ to do so, DO IT. plating lasts a long time and will deffinatly slow down the wear process unlike the regular steel sleeve does. also, what kinda piston are you running? wiseco? prox?
Unfortunately I have to run a Wiseco right now as they are the only piston that you can get over 2nd over, If I get the cylinder sleeved I will run a Standard size Wossner.

It's just that Wossner doesn't make anything over 2nd over & I'm on a 4th over.
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Old 04-01-2011, 06:02 AM
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Plated is the only way to go. But you can get your piston teflon coated. It helps with having less friction.
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Old 04-01-2011, 08:02 AM
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I'd run a plated bore. Nikasil or chrome - my preference would be Nikasil. It's more wear resistant from what I've seen.

The coated pistons do help.

Lukes Racing Engines, Nikasil cylinder replating, Nikasil cylinder re-plating, Nikasil replating, Nikasil re-plating, nikisil cylinder re-plating, nikisil cylinder replating

Scott
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Old 04-01-2011, 04:29 PM
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You can get a custom Aluminum sleeve from Advanced:
Advanced Sleeve: Cylinder Sleeve Supplier, Mentor, Ohio
After it's installed and the port work is done, send it to
Millinneum Technologies:
Cylinder Repair, Head Repair, Cylinder Replating Services by Millennium Technologies
for Nikasil plating.

This is how I am sleeving down my 78 CR125 to 100cc.

You can go back to stock bore and also, the Aluminum will
transfer heat to the fins much better than a steel sleeve.
Wiseco pistons work great with the Nikasil and you won't
have to worry about boring anymore unless you blow one up.

dogger
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Old 04-01-2011, 05:29 PM
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Quote:
Originally Posted by dogger315 View Post
You can get a custom Aluminum sleeve from Advanced:
Advanced Sleeve: Cylinder Sleeve Supplier, Mentor, Ohio
After it's installed and the port work is done, send it to
Millinneum Technologies:
Cylinder Repair, Head Repair, Cylinder Replating Services by Millennium Technologies
for Nikasil plating.

This is how I am sleeving down my 78 CR125 to 100cc.

You can go back to stock bore and also, the Aluminum will
transfer heat to the fins much better than a steel sleeve.
Wiseco pistons work great with the Nikasil and you won't
have to worry about boring anymore unless you blow one up.

dogger


Don,

That's what I was looking for! Now I just have to figure out how much $$ it's going to take.
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Old 04-01-2011, 08:52 PM
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Since the aluminum is now available reasonably I would go with that for my next build on a cast iron cylinder. If you have some porting you want to save it is worth it to plate what you have. Otherwise with the weight savings and more consisten running, I would go for the alluminun sleeve.
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