240 sleeve

[veryfast518]

can i put a 240 sleeve in a stock cylinder

 

[scotj77]

yes. la sleeve is a good place to look better than vitos. Make sure your machinist is good though. Lot's of people here like ken Oconnor, flotec, wildcard, and a few others i cant think of right now

 

[craigz9876]

I've heard the sleeve can spin so it's recommended to get it pinned whilst it's being installed. I'm also looking into this

 

[Painthehouse]

One thing I still cant understand, can someone tell me how a measurement of 240cc's can fit into a cylinder of roughly 205cc's max. Adding a sleeve would make the inside diameter and measure smaller?

 

[sicivicdude]

The replacement 240 sleeve is thicker at the top where the combustion chamber is and then thinner at the bottom where the sleeve sits down into the cases.

 

[Painthehouse]

Isn't it the combustion chamber thats the decider? Bigger combustion chamber, more power?

 

[GIXER7502006]

I think i understand what he is asking or maybe im wrong, but how does a sleeve fit and you cant, say bore it to a 250

 

[sicivicdude]

200 cc is what's called the swept volume. That's the volume of the cylinder which is forced clear or "displaced" each stroke.

With a big bore kit, the bore size is increased by putting a bigger piston in the engine. The total swept volume or displacement is increased to 240cc's.

The stock sleeve starts getting thin when the piston size increases from 66mm (stock) to 68.25 (maximum overbore for the stock cylinder).

The big bore sleeve is larger around, OD, to allow up to a 73mm piston to fit inside of it.

 

[Awk08]

is ken oconnor the only one "pinning" these sleeves to the cylinder ???

 

[Whitty21]

One thing I still cant understand, can someone tell me how a measurement of 240cc's can fit into a cylinder of roughly 205cc's max. Adding a sleeve would make the inside diameter and measure smaller?

i understand what u are asking, the old sleeve is removed, the housing bored bigger, and it is re-sleaved, that should answer your question

 

[Blazed405]

how do you say thank you...

i understand what u are asking, the old sleeve is removed, the housing bored bigger, and it is re-sleaved, that should answer your question

Finally
So... the new sleeve is bigger than the old sleeve~ outer diameter,
If i have a press, an old cylinder, and a BigBore sleeve, i aint gunna get it done
The new sleeve dont fit the hole of the old sleeve without help
You cant bore a stock cylinder for a 240 piston it aint big enough

and in conclusion
a 240 sleeve DONT FIT a unmodified stock cylinder jug without the cylinder in it...



so you could break out of the box find any damn cylinder sleeve and make it fit just as easy, say a unported rz350 cylinder sleeve??

NOW THEN
PORTING..

I know theres a few different names
When the sleeve finally gets fitted can you look through the intake and see cylinder sleeve, like read the name printed on the outside of the sleeve???

is there cylinder "jug" material blocking the ports cut in the sleeve and the other way around, if so how would you fix that youd grind down the intake runners to remove, but how would you "ADD" i quess some jb weld or tig it in??

other than really sh*tty port flow would it cause any damage to the sleeve without any support behind it to absorb heat??

 

[sicivicdude]

other than really sh*tty port flow would it cause any damage to the sleeve without any support behind it to absorb heat??

The short answer is yes, it's more likely to cause a siezure if there isn't aluminum behind the steel to absorb the heat the engine is creating.

The long answer is this:

YAMAHA 200 BLASTER VITOS VITO'S 240 240CC BIG BORE KIT | eBay

Big bore kit in a box if you can have someone install the sleeve and port match it. No need to fit a RZ350 sleeve or anything... The vito's sleeve SHOULD match the ports well enough to have a simple port match done and voila, Big Bore Kit.

The trouble is, getting a sleeve installed and ports matched runs as much (or perhaps more) than simply buying a vito's big bore kit cylinder (and the vito's comes with a redesigned cylinder head). If you know someone who can press in a cylinder sleeve and then you have the tools to port the cylinder, you can come out less expensive in the long run (but with a LOT more time involved and no possibility of falling back on your stock bore cylinder in the event something happens to the Big Bore Kit.