Superjet build engine question

[SJ636]

Im in the process of building up a 02 R/N for freestyle. I have 2 options right now for the top end.
1. 61x stock bore with freestyle porting
or
2. 61x with big bore 760 sleeves no porting.

Which would be better for freeriding?

 

[Kennay]

Save a little longer to get the bigbore ported.

 

[Etheraldreamer]

sticking to strictly these two options without thinking of getting the bigbore ported i would use the ported stock bore.
good porting work is worth a lot more power than a couple of cc's on the stock ports.

 

[SJ636]

Well I want to get the 760 ported but its just a matter of time... Being from Saskatchewan canada we get 3 or 4 months to ride a year and as of now my ski is in pieces so im missing valuable riding time!. If I do get the 760 id plan to get it ported over winter.

Would there be a noticeable difference with these 2 options the way they sit?

 

[Etheraldreamer]

depending on the porting, absolutely.

 

[SJ636]

The 701 cylinders are stock 81mm and freestyle ported by judge motorsports. I think im leaning towards the 760 cylinders right now tho, then I can get them ported over off season. Any other suggestions, tips or pointers?

 

[SUPERTUNE]

The main problem with a re-sleeved 61X with 760 sleeves is WHAT brand of sleeve was used as some sleeve manufactures come way to aggressive port heights for a freestyle/freeride setup. They have port timing like the 'T' cylinder that is also like the 64X-760 cylinder.

 

[SJ636]

So after some research and figuring out, I think im going to just go with the ported 701. My 62T case is cut for 760 sleeves right now, will it be ok if I go back to a 701 and just drop in the cylinders or will I need a new case??

 

[SUPERTUNE]

Your fine with your cases... Just install your 701 cylinder. We always recommend to flycut the cases for big bore kit even when building a 701 based sleeve, this way when the customer want to upgrade to the 85mm big bore it will be a drop on and go with a cylinder kit w/pistons and a pair of new ADA domes matched for the big bore pistons.

 

[Cannibal]

The main problem with a re-sleeved 61X with 760 sleeves is WHAT brand of sleeve was used as some sleeve manufactures come way to aggressive port heights for a freestyle/freeride setup. They have port timing like the 'T' cylinder that is also like the 64X-760 cylinder.

Specifically, the NW Sleeve ones? I've considered going that route. Watcon has some too, I don't know who's they are. Do you guys offer an 84mm re-sleeve that could still be freestyle ported? You might save me an expensive 'whoops' next year.