Back to stock pipe from Riva red, Jetting?

[EB18]

Hey folks, I have a bit of a unique situation. And am hoping to draw an opinion from people with way more experience since I only really know my setup.

Looking for a decent place to start regarding jetting.

Going from red pipe back to stock exhaust.

Jetting with the red pipe: single stock 44 carb, 2.0ns, 120/150 jets 95g spring at sea level, primer, stock electronics

Engine: Cyls are ported, thin head gasket ~160psi, bored up a couple sizes ~735cc

I also have a stinger for the stock exhaust that I’m thinking I’ll put in.

Am I good to run the cab setup as-is or should I drop it down to 120/140 or 120/137.5?

Thanks lads, trying to get this girl back in the water asap!

 

[EB18]

Nobody else running ported 61x cyls on a single 44mikuni and stock exhaust with a stinger? LOL.

Plan at the moment is to step down to 140 main, keep the 120 pilot and 2.0n/s with 95g spring. I'll report back after I get time to head to the lake for some tuning.

 

[kevbo]

The top screw adds fuel so you can adjust the mixture. A 150 main will probably be okay with the screw closed. If not then install a smaller jet and retune. Either way you must learn how to tune your carb since every engine has different needs.

 

[WFO Speedracer]

Nobody else running ported 61x cyls on a single 44mikuni and stock exhaust with a stinger? LOL.

Plan at the moment is to step down to 140 main, keep the 120 pilot and 2.0n/s with 95g spring. I'll report back after I get time to head to the lake for some tuning.

Take a look in here there might be something there , but yeah your setup is not that common on a Superjet , maybe on a Waverunner lll or a VXR .

Carburetor (specs) Database: SuperJet and Blaster 1

The SuperJet and B1 Carburetor Database I'm in the process of putting a pair of 46mm Mikuni's on my SJ to see if I like them and have been thinking of how I plan to jet them. I then though how helpful it would be if we all had a large database list of what others run with their given setup...

www.x-h2o.com

 

[EB18]

Take a look in here there might be something there , but yeah your setup is not that common on a Superjet , maybe on a Waverunner lll or a VXR .

Carburetor (specs) Database: SuperJet and Blaster 1

The SuperJet and B1 Carburetor Database I'm in the process of putting a pair of 46mm Mikuni's on my SJ to see if I like them and have been thinking of how I plan to jet them. I then though how helpful it would be if we all had a large database list of what others run with their given setup...

www.x-h2o.com

Ya I went through all 26 pages of the database and couldn't find anything ported/ stock pipe. I'll fiddle with it next lake day and add to the database what I come up with.

 

[fastgtfairlane]

120p 140m sounds like a good starting point. Won't know till you put it in the water and run it

 

[WFO Speedracer]

Ya I went through all 26 pages of the database and couldn't find anything ported/ stock pipe. I'll fiddle with it next lake day and add to the database what I come up with.

Anything added to that thread would be a good thing for future reference.