SXR 800 Engine with 44s Tuning Help

fischer550

fischer550

Location
Milton, Florida
I picked up an aftermarket gen 2 X2 with an SXR 800 engine with dual Mikuni SBN 44s. It also has a Factory B wet pipe.

Does anybody have tuning specs for the above setup? Looking for main jet, pilot jet, n/s and spring, screw settings. Having a hard time finding that info for the dual 44s.
 
S

sturat

Location
WA state
call wade chapin, tell em stu said hes the guru

941-928-4748

he opens at 10am

however 115/115 with a 2.0 and 95g spring to the best of my recollection ran really well, maybe a turn out each.
 
kevbo

kevbo

Location
dfw
You need to learn how to tune the top screw/main jet. Start rich then slowly lean, nobody can know exactly where it will end up.
 
WFO Speedracer

WFO Speedracer

A lifetime ban is like a lifetime warranty !
Location
Alabama
kevbo said:
You need to learn how to tune the top screw/main jet. Start rich then slowly lean, nobody can know exactly where it will end up.
Click to expand...
without the right jets and popoff you can twist the screws all you want but it ain't gonna happen for you.
 
kevbo

kevbo

Location
dfw
I can make the idle mixture perfect with plugged jets and any pop-off pressure since the bottom screw is the main control at that throttle position.. The top screw can generally add up to #20 to the main jet so those can be less than perfect. The main jet could be plugged if the top screw needle was enlarged slightly. SBN 44s are the easiest carbs to tune so he shouldnt have any problems. He just placed the cart in front of the horse.
 
Big Kahuna

Big Kahuna

Administrator
Location
Tuscaloosa, AL

Tuning tips for Rookies.

Tuning tips for Rookies. *** YOU must use the tachometer to tune *** Do not trust the peak RPM reading; you must watch the tach while riding. Start with the screws set at 1 turn out, and tune with the tachometer for peak Rpm, then stop there and count the number of turns on the high...
www.x-h2o.com
 
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