bigger carbs?

[mattdedes]

Ok this is what I am currently putting on my 97 SPX: Factory Spec II exhaust, ADA head 175lbs, XO prop, 85/88 nozzle, and fly FA's

Now the question is, Do you guys recommend that I go with bigger carbs, say 44's or would I be fine just rejetting my stock 40's?? Thanks.

[Hash]

Re: bigger carbs?

Now the question is, Do you guys recommend that I go with bigger carbs, say 44's or would I be fine just rejetting my stock 40's?? Thanks.

You won't realize the full potential of what you've done unless you do. And it's a small amount of money in comparison with what you've already spent.
With the SPEC-2, that engine could utilize up to 46's or possibly 48's.

[Bill O'Neal2]

Re: bigger carbs?

Your choice.
Rejet the stock carbs ( they have a 42mm inner venturi bore ) or you can install 46mm Mikuni's.

The rejetted stock carbs can work fairly well, but for maximum power and speed, the 46's are even better.

[mattdedes]

Re: bigger carbs?

This might be a dumb question but could I use a set of 46mm carbs off a 98 GSX ltd. on my SPX, would they bolt right on? sorry Im not too inclined in the carb department.

[Technical Support]

Re: bigger carbs?

No, the bolt pattern is different.

[frankey01]

Re: bigger carbs?

As long as your bolt patterns match up you are fine.

[Bill O'Neal2]

Re: bigger carbs?

Franky, They don't and they are not even close.

[frankey01]

Re: bigger carbs?

Bill,
What I was trying to say was for him to check his bolt patterns and if they match then he could use them if they dont then he can not use them. It would only make sense to check if they bolt on or not to see if you can use them or not. I have learned that much so far.:)

[Bill O'Neal2]

Re: bigger carbs?

Yes that's fine Frankey, but chances are he hasn't bought them yet, so I'd hate to see him buy something that doesn't fit.

[mattdedes]

Re: bigger carbs?

Thanks guys, guess i wont be buying those... :) so what should I be looking for, do they make specific 46mm carbs for the 785 motor then?

[frankey01]

Re: bigger carbs?

Bill you are right about that I didnt think of that I read the question as saying he had another ski with them on it and was asking if they fit.

[Minnatonka4Me]

Re: bigger carbs?

I am using a rossier pipe so I have a little different setup, but I had the stock carbs bored to a true 42mm and felt alot for 180 bux. I've heard that big carbs take some extra tweakin that I have not experenced but I am using a different pipe. But hey if your not spinning super high rpms with race gas and 200lbs compression you might not need 48's. Tech support knows their stuff though....just throwing thoughts out

[Bill O'Neal2]

Re: bigger carbs?

To swap over to dual 44's or 46's you need an intake manifold and the carbs.

I could set you up with a very nice Novi 44 setup on an R&D intake for about $695.00, they cost $1150 new.