Jetting Help Needed 650 SX With A 750 SX Engine In It.

[dbrutherford]

The title says it. Here is the goods:

Head: R&D 27 cc domes
Cylinder 1992 750 SX Stock Porting Bored .5 mm over
Pistons: Wiseco
Exhaust Manifold: Coffman's 650
Exhaust Pipe: Coffman's 650
Water Box: Coffman's 650
Coffman Inline Silencer
Jetinetics 650 Aluminum Flywheel
Dales Badd Attitude 650 Rev Limterless CDI Box
650 Electrics Elsewhere
R&D Case Stuffers
R&D Rad Valves
R&D Single Carb 750 Intake Manifold
Mikuni Silver Series SBN 44mm Carb
Tau Ceti Cone Stainless Flame Arrestor
Prop: Jet Sports 650 16 deg Pitch Stainless
Grate: Jet Dynamics 650 Top Loader
Plate: Jet Sports Extended
Nozzle: Ocean Pro 650 Bored

Neddle 2.5 80 gram spring
Main a 160
Low a 130
Hig Screw 2.0 turns out
Low Screw 1.5 turns out

On wide open runs it dies and sputters. Then you have to baby it until it gets going again at about 1/2 throttle. On low end it was prety crisp and ran good. But then I played with the screws and messed it up. So if anyone has a good base line to go with, please let me know.

Check out these threads:

http://www.pwctoday.com/viewtopic.php?t=15069&highlight=

http://www.pwctoday.com/viewtopic.php?t=37108&highlight=

Thanks, David

[dbrutherford]

Re: Jetting Help Needed 650 SX With A 750 SX Engine In It.

Bump

[dbrutherford]

Re: Jetting Help Needed 650 SX With A 750 SX Engine In It.

Anyone? A little Help?