Carburetor (specs) Database: SuperJet and Blaster 1

[ISeeWetPeople]

but pop off do i go with stock 55psi or should i lower it?

 

[Neno]

Lowest pilot jet for 84 piston is 110 and 175 compression. Piston seizure is best friend with bad carb setting. I tell you because i repair over 500 engines

 

[Neno]

With smaller jets you have better low end but seizure will come in first tank

 

[ISeeWetPeople]

wow two totally different version=) should i go to middle or?

 

[jetx]

wow two totally different version=) should i go to middle or?

Sounds like you have been given advice for a stock single 44 with the 120/150 suggestion and dual 44's with the 110 pilot suggestion...you said you had dual 38's on x cases...i'd start with what quinc suggested.

 

[Neno]

I am sorry didnt see it is pair of 38. 90/140 is great combination with choke body delete and 1 turn low and high. Stock pop off need a primer for this setting

 

[cookn]

Tuning info from Jetmaniac ,the ski now rips.

Brand = MIKUNI
Model = A/M SBN new
Size =44
Quantity = 2
Main Jet = 110
Pilot Jet = 125
Needle/Seat = 2.3
Spring = 95gr, 19 psi popoff
Pilot screw = 3/4
Main Screw = 1
- - - - - -
Gas Octane = 98
Altitude = SEA LEVEL
Main type of riding = FREE RIDE SURF JUMPING
Would it pass the 10 second WOT test = YES ALWAYS
Powerband = ?????
Motor type/setup =84 mm BB NW SLEEVES,PROX PISTONS,HOTROD CRANK, 61X CYL, 62T CASE BOTH PORTED,ADA HEAD 38mm DOMES, FP LIMITED PIPE, LIGHTEND FLYWHEEL,MSD CDI AND COIL,BOYESSEN INTAKE WITH RAD VALVES,RIVA CONE F/A[/QUOTE]

Thought I would Bump this one. I used this setup on a fully ported 718 as an upgrade from 38's. I didn't have to touch a thing and the ski ran great. Great starting point for a small bore freestyle ski running dual 44

 

[newbee]

Dose anyone have jetting for a 760. With a b pipe and dual 44s ? Or a good staring point.

 

[cookn]

Start with what I posted. your cc is not far off and same pipe and carbs. I know people who have jumped 70-100cc with the rest of the setup the same as before and only had to tweak screws on the carbs to dial them in.

 

[x2steve]

Hi guys im struggling with the set up in my b1
The spec is as follows

Stock 61x case and barrels
Apt girdled head with 33cc domes
+1mm pistons (82mm)
Riva manifold and pipe
Wetjet inlet with built in stuffers
Tau ceti arrestor
48mm annular carb
150 main
125 pilot
2.3 ns
Unknown pop off (guage coming soon)
Cdi with Rev removed
My question is where should I start with jetting please?
Does this look close or a mile off?
Thankyou in advance for any advice
I'm a bit stuck

 

[cam_lg]

Hi guys im struggling with the set up in my b1
The spec is as follows

Stock 61x case and barrels
Apt girdled head with 33cc domes
+1mm pistons (82mm)
Riva manifold and pipe
Wetjet inlet with built in stuffers
Tau ceti arrestor
48mm annular carb
150 main
125 pilot
2.3 ns
Unknown pop off (guage coming soon)
Cdi with Rev removed
My question is where should I start with jetting please?
Does this look close or a mile off?
Thankyou in advance for any advice
I'm a bit stuck

What kind of gas are you running? 1 over with 33cc domes is near race gas territory

Sent from my SAMSUNG-SM-N915A using Tapatalk

 

[Quinc]

Hi guys im struggling with the set up in my b1
The spec is as follows

Stock 61x case and barrels
Apt girdled head with 33cc domes
+1mm pistons (82mm)
Riva manifold and pipe
Wetjet inlet with built in stuffers
Tau ceti arrestor
48mm annular carb
150 main
125 pilot
2.3 ns
Unknown pop off (guage coming soon)
Cdi with Rev removed
My question is where should I start with jetting please?
Does this look close or a mile off?
Thankyou in advance for any advice
I'm a bit stuck

Looks close. I would start at 160 / 130 to be safe though.

 

[x2steve]

I'm getting 175psi

 

[x2steve]

And uk pump fuel at 95

 

[cam_lg]

I'm getting 175psi

I'm no expert but that seems pretty low for 33cc domes. Ada recommends 100 Murican octane for them. And that's without a bore.

Sent from my SAMSUNG-SM-N915A using Tapatalk

 

[Fro Diesel]

I'm no expert but that seems pretty low for 33cc domes. Ada recommends 100 Murican octane for them. And that's without a bore.

Sent from my SAMSUNG-SM-N915A using Tapatalk

Compression psi changes with elevation. If you are not at sea level you will get different results.

 

[N3vrSat1sfied]

Just jetted my PHP760 with OEM 44's thought id share:
Brand = Mikuni
Model = Retail
Size = 44mm
Quantity = 2
Pilot Jet = 117.5
Main Jet = 115
Needle/Seat = 2.0
Spring = 80g
Pilot screw = 1-1/4
Main Screw = 1-1/4

ProK flame arrestors.

 

[Adidasandy]

Brand = Mikuni
Model = Dual SBN
Size = 44mm
Quantity = 2
Main Jet = 130
Pilot Jet = 115
Needle/Seat = 2.0
Spring = 22psi pop off (gauged used)
Pilot screw = 1
Main Screw = 3/4
- - - - - -
Gas Octane = 97 (super)
Main type of riding = Freeride / surf
Would it pass the 10 second WOT test = Never tried nor will I ever
Powerband = Low (lower than a snakes belly)
Motor type/setup = 61x/62t, AM head (160psi), Factory B pipe, TDR water box, Riva inlet manny, Carbon reeds.

 

[billglass]

Anyone have jetting specs from a taper bored 38"s. I went through the whole list and didn't see any?

 

[billglass]

NO one with taper bored 38's here so I'll start this If anyone is still watching this thread? Does this sound too rich? Engine Jetmaniacs 718cc stage 2 ported engine with ADA 185 head. lightened flywheel, vforce reeds, R&D flame arrestors, TAPER bored group K 38's carbs, Msd enhancer, Riva red pipe.
LSJ 90
HSJ 150
pop-off 25
low screw 3/4
high screw 1 1/2
I figure I'll start here and go from there. ANy input? FYI the taper bore carbs are fuel hungry in my setup and required me to jet up to remove the hesitation.