97 GP 1200 Carb Question (Yes, Another)

[JandJ]

I have been reading this forum quite a bit lately to help me with carburetor questions. I realize there has been alot of questions that relate to the GP1200 but I couldn't quite find what I am looking for. After purchasing the waverunner last year, I drove it last summer and it ran bad. These problems included excessive gas and oil consumption, bogged acceleration, but good top end. The plugs show rich but did not fowl out at all last year. The modifications that were done before I purchased the waverunner were Riva F/A's and I think the head was decked and thats all, as far as I can tell.

After reading the forum I figured the carb's needed to be rebuilt, and I also wanted to see what kindof jets and needle and seat were in there. After disassembly I found the Pilot Jet to be 120, Main Jet to be 110, Needle and Seat 2.3, and not sure what the pop-off spring is.

I was wondering if you guys think these settings would cause the problems I am having? I think this maybe the problem and the guy that I bought it from didn't know what he was doing when he redid the carbs.

Also, should I go with the 100 Pilot Jet, 135 Main Jet, 1.5 n/s, and the 115g spring that has been suggested in the multiple other posts on here?

I was confused because the Mikuni manual has all different numbers for the BN44-40-8067, BN44-40-8052, BN44-40-43 carbs. I am not sure which one was used on the 97 GP 1200.

Thanks in advance for your input and advice.

[Technical Support]

Re: 97 GP 1200 Carb Question (Yes, Another)

http://www.sbtontheweb.com/forum/showthread.php?t=13992

[JandJ]

Re: 97 GP 1200 Carb Question (Yes, Another)

In the High Performance setup they use, 100 pilot, 120 Main, 2.3 N/S, 95g Spring

This post is what has me confused..
http://rivaforums.com/eve/ubb.x/a/tp...543#445109543S

Pistonwash says that 2.0 N/S is too much, and recommends 1.5 N/S. He also recommends staying close to the factory Pilot and Main Jets. Maybe I am confused because a 98 GP1200 uses different carb settings then a 97 GP1200?

So if my current setup that was in there is 2.3 on the N/S, would this cause the rich condition?

[Technical Support]

Re: 97 GP 1200 Carb Question (Yes, Another)

The list is what I run on my personal ski. Other people have their opinions, you'll have to ask them. I know what works, and that's what I do. The needle and seat has nothing to do with the mixture rate, it's simply used in conjuntion with the spring to set a pop-off pressure. I tried all those riva combos and you already read what I ended up with.