who runs 62t jugs in there SJ?

[Crab]

For all the haters..........fine. Mine rips and does flatwater rolls with ease. (just not with me on it.)

 

[Kennay]

:sneaky:

 

[Officer Mike]

supplements aside......


right now i am thinking 62t cases(ported) 61x jugs (resleeved?) bored to 86mm. ported myself lightweight flywheel, big carbs drypipe etc

 

[Kennay]

That would be an ideal setup as most on here would say.

 

[Officer Mike]

should i resleeve?

 

[Kennay]

From what I gather, most aftermarket companies won't bore a 61x cylinder to 84mm let alone 86, so I'd say yes. Now if it were on 64x (760 with 62t timing) sleeves, I don't know about the max bore on those.

 

[Matt_E]

supplements aside......


right now i am thinking 62t cases(ported) 61x jugs (resleeved?) bored to 86mm. ported myself lightweight flywheel, big carbs drypipe etc

Even with BB sleeves, I wouldn't go to 86. You'd have only a bore or two left, and your head/dome options are limited.

 

[yamahammer]

For all the haters..........fine. Mine rips and does flatwater rolls with ease. (just not with me on it.)

^^^x2 mine too-- sad but true

 

[yamanube]

Even with BB sleeves, I wouldn't go to 86. You'd have only a bore or two left, and your head/dome options are limited.

^^what he said, go with 84mm

 

[Officer Mike]

with 84 mm, i would have to use any 701 head with 760 domes, correct? im not worried about not having any bores after 86, but if i needed domes i would need 760 domes (for 86) then have them machined? thanks

 

[Big Kahuna]

yes 84mm domes
81mm domes cover up to 83mm

 

[Matt_E]

with 84 mm, i would have to use any 701 head with 760 domes, correct? im not worried about not having any bores after 86, but if i needed domes i would need 760 domes (for 86) then have them machined? thanks

It's more complicated than that. Above 86mm, many domes don't have any sealing surface (room for O-Rings) left.

 

[Officer Mike]

but its ok t 86?

 

[Matt_E]

Yes. Without any overbores left.

What you gain by going from 84.5 or 85.0 to 86.0 is negligible. I wouldn't give up the ability to bore up for a few cc's.

 

[bad93blaster]

I would probably start by selling that dry pipe and going to a B-pipe then worry about the cylinder. In my opinion my bottom end ported 61x hit alot harder than the mildly ported 760 cylinder.

the cylinder isnt gonna make up the power difference he will lose by going to a b-pipe

 

[Officer Mike]

Yes. Without any overbores left.

What you gain by going from 84.5 or 85.0 to 86.0 is negligible. I wouldn't give up the ability to bore up for a few cc's.

i think you raise a good point. so if i choose, 61x jugs resleeve them, and if its 760 just bore then 1 over.

the cylinder isnt gonna make up the power difference he will lose by going to a b-pipe

what he said.