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The TTR250 FAQ web pages -> TTR250 -> Modifications -> cylinder sleeve OD
Post Info TOPIC: cylinder sleeve OD
petenz


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cylinder sleeve OD
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just picked up TTR250 cylinder with no sleeve....

Dose anyone know the dia of the sleeve where it goes in the crank case ?

I have a old nissan sleeve that may have enough metal in it to machine to fit.. 72mm ID / 86mm OD

would like to go as big in bore as I can with out having to pull the motor

down to bore the cases..



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petenz


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TTRfan wrote:
petenz wrote:

Does anyone know the dia of the sleeve where it goes in the crank case ?

The standard sleeve is 78mm

The outside diameter of the Thumper 325 barrel is 86mm

Brian

 Thanks...

So anything bigger than a 75mm bore is pushing yer luck...

Was hopeing to get close to 300cc.... but not with out boreing the cases...

Brian....Yer not got a set of crank cases have yer ?

 

edit...

just found 2 sets on E-bay in the UK... asked for shiping prises...bleh

 



-- Edited by petenz on Saturday 21st of September 2013 09:20:59 PM



-- Edited by petenz on Saturday 21st of September 2013 09:39:10 PM

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TTRfan


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petenz wrote:

Does anyone know the dia of the sleeve where it goes in the crank case ?

The standard sleeve is 78mm

The outside diameter of the Thumper 325 barrel is 86mm

Brian



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TTRfan


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petenz wrote:
Brian....Yer not got a set of crank cases have yer ?

Hi Pete

I got a pair of standard crankcases (£40) and also a pair already bored out to take the Thumper oversize sleeve (£95).

The killer will be the shipping cost to NZ but if you are interested then I will see what the best price is.

Brian 



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petenz


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TTRfan wrote:
petenz wrote:
Brian....Yer not got a set of crank cases have yer ?

Hi Pete

I got a pair of standard crankcases (£40) and also a pair already bored out to take the Thumper oversize sleeve (£95).

The killer will be the shipping cost to NZ but if you are interested then I will see what the best price is.

Brian 

 ok..see what the shiping cost is.... If I can build a motor for around a 1000nz it's not to bad...

prob be the un-bored cases.... as I can bore them myself to what ever size I go to..



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TTRfan


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Bad news Pete - the best quote I can get for shipping is over £60 no

You may be able to get the cases much cheaper locally.

Brian



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petenz


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Thats $190NZ all up..isn't as bad as it seems...

If I could fined a set of useable cases here 

I most lightly could get them any cheaper..

 

I will look around..but I think I will be back to yer...



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