Did I just buy a Bigbore 61x ?!?!

[douglee25]

It looks like an aftermarket sleeve to me. I thought the 760 sleeves get thinner where they go in to the cases.

That's what I'm seeing as well??:dunno:

 

[1550]

i thought that 760 sleeve is 90mm all the way up? Except the upper part where it is like 92 or 94...


Have anybody specsheet with sizes for those bigbore sleeves?

 

[yamaslut]

definately stock :cool2:


this is a big bore... notice the thickness of the aluminum around the sleeve

 

[douglee25]

I don't believe you can go by the top diameter because in your case, the cylinder has been clearanced for the sleeve. The physical sleeve is not that thick all the way from the top to the bottom. There is a recess at the top of the cylinder where the sleeve rests. You're better off looking at the thickness in the port area to compare.

Doug

 

[yamaslut]

I don't believe you can go by the top diameter because in your case, the cylinder has been clearanced for the sleeve. The physical sleeve is not that thick all the way from the top to the bottom. There is a recess at the top of the cylinder where the sleeve rests. You're better off looking at the thickness in the port area to compare.

Doug

woudn't it still be thinner????

 

[1550]

yamaslut:what size this is bored?


Nobody doesnt have 2d drawing for bigbore sleeve and for 760 stock sleeve?

 

[BombThreat]

so... what should i do with this thing guys? I measured the bottom OD and its still 90+mm(little bit higher) and the ID is 85.5-mm(little bit under)

 

[yamaslut]

yamaslut:what size this is bored?


Nobody doesnt have 2d drawing for bigbore sleeve and for 760 stock sleeve?

94mm

 

[douglee25]

woudn't it still be thinner????

I think you've confused me:cool2: Maybe I confused myself? urr:

Doug

 

[Matt_E]

The casting has to be bored in order to get bb sleeves into a 61X cylinder. The top should be thinner - I think. The sleeve has a lip on the top. I imagine that lip is bigger on the BB sleeves compared to STD sleeves.