2000 gtx di

[Snowmachine]

I’m rebuilding a 2000 seadoo gtx di
951cc
I have a question
The air compressor sleeve appears to have an o-ring #28 in between the case and the sleeve ….. is this correct ? Does it need to be replaced?

Thanks for the help

 

[etemplet]

It is a good idea to replace it. If you don't have a new o-ring and are concerned you can put a little 518 on it and assemble the compressor.

 

[WaarrEagle]

The picture is slightly misleading. The o-ring does not go between the sleeve and the crankcase. It goes between the top of the sleeve and the air compressor head (#26). And yes, I would replace it if you have the compressor head off due to how important air pressure is to a DI.

 

[Snowmachine]

Thank You

 

[Snowmachine]

Another quick question….
About Piston and bore size
I purchased a cylinder from sbt
they sent me standard pistons
When installed there is a lot of room between the piston and the cylinder walls
How much oversized should the cylinder diameter be ? ( I know the rings take up some room)
What diameter should the piston be and what size should the cylinder be ?
Thank for your help

 

[etemplet]

Bore size should be around .004" to .005" roughly, .008" is the max limit on stock pistons. Bore size recommendations change with piston manufacturer. Check your piston ring gap also.