edstein
New member
I just had my carbs cleaned on my 2000 sxr 700 and my kid was running it all last season.I used it toward the end of the season and said why is this thing stumbling around 20 to 25 miles per hour. I called the dealer and he said it is probably the gas and I said you just cleaned the carbs. I put a can of seafoam in it over the summer. It started up fine this fall and idles fine but when you bring the rpms up past engagement it kind of bogs and then clears out fine when you are running say over 30 mph. what should I have him look at to eliminate this .My kid must have rode this machine all last season like this, but it annoys me that I paid to have the machine serviced and it is not crisp on the low end
any help always appreciated
any help always appreciated
cajones2
Member
Could it be a lean bog? Try raising your needles by lowering the clip one position at a time. I had a similiar issue and this fixed it. Perhaps they didn't restore the clips to the previous setting. I am assuming you have one washer above and below the clip too. Hope this helps. - Craig
jwiedmayer
New member
Or back the pilots out a bit. It does sound like a lean bog.
mopar1rules
Active member
jwiedmayer said:
you mean back out fuel screws?
jwiedmayer
New member
Yes you worded it proper. Richen the pilot circuit buy backing out the fuel screws.
mopar1rules said:
mopar1rules
Active member
i figured that's what you meant....lol.
mopar1rules
Active member
jwiedmayer, don't you have a hyperlite on that 600sx in your avatar? if so, how do you like it? i bought one for my rev this year.
daman
New member
do you have a idle hang???
edstein
New member
carb adjustment
What is idle hang???
I figured out where the fuel screws are 1 and a quarter turns out.?? people seem to think I am running lean,Can I correct that condition by moving the screws out??? are there 3 screws , one on each carb?? do I move all 3 screws or does 1 screw control all 3 carbs.
What is idle hang???
I figured out where the fuel screws are 1 and a quarter turns out.?? people seem to think I am running lean,Can I correct that condition by moving the screws out??? are there 3 screws , one on each carb?? do I move all 3 screws or does 1 screw control all 3 carbs.
FUEL SCREW:
(TM 33) This screw is located at the bottom of the float bowl, the screw meters fuel and opening the screw (counter-clockwise) out results in a richer mixture.
AIR JET, PILOT JET, FUEL SCREW, AND SLIDE CUTAWAY:
Keep in mind that the fuel screw gives a good indication of a properly sized Air Jet and Pilot Jet. The Air Jet and Pilot Jet calibrate the mixture from both the idle bypass and the idle orifice. If the idle screw is properly adjusted, but the engine does not have good response when the throttle is snapped wide-open, it is usually a sign of a lean mixture and the Air Jet/Pilot Jet will need to be replaced with one size (richer) and the fuel screw re-adjusted. Consequently, if the throttle is only partially opened, such as in a trail riding situation, and the sled loads up (slow to build rpm) when the throttle is returned to wide-open, it is usually a sign of a rich Air Jet/Pilot jet. If the Air Jet or Pilot Jet does not clean up this part of the circuit, the slide can be substituted for one with a different cutaway (not recommended). The higher the number, the larger the cutaway will be, allowing more air to the nozzle leaning the mixture and, conversely, a smaller cutaway will richen the mixture with a greater effect up to 1/4 throttle.
Idle hang is when you come to a stop let off the throttle and the RPMs hang for awhile then drops down.
If you adjusting, you need to adjust the fuel screw on all 3 carbs.
Head to the "Tech Section" and surf around up "Engine/Jetting" everything you need to know
(TM 33) This screw is located at the bottom of the float bowl, the screw meters fuel and opening the screw (counter-clockwise) out results in a richer mixture.
AIR JET, PILOT JET, FUEL SCREW, AND SLIDE CUTAWAY:
Keep in mind that the fuel screw gives a good indication of a properly sized Air Jet and Pilot Jet. The Air Jet and Pilot Jet calibrate the mixture from both the idle bypass and the idle orifice. If the idle screw is properly adjusted, but the engine does not have good response when the throttle is snapped wide-open, it is usually a sign of a lean mixture and the Air Jet/Pilot Jet will need to be replaced with one size (richer) and the fuel screw re-adjusted. Consequently, if the throttle is only partially opened, such as in a trail riding situation, and the sled loads up (slow to build rpm) when the throttle is returned to wide-open, it is usually a sign of a rich Air Jet/Pilot jet. If the Air Jet or Pilot Jet does not clean up this part of the circuit, the slide can be substituted for one with a different cutaway (not recommended). The higher the number, the larger the cutaway will be, allowing more air to the nozzle leaning the mixture and, conversely, a smaller cutaway will richen the mixture with a greater effect up to 1/4 throttle.
Idle hang is when you come to a stop let off the throttle and the RPMs hang for awhile then drops down.
If you adjusting, you need to adjust the fuel screw on all 3 carbs.
Head to the "Tech Section" and surf around up "Engine/Jetting" everything you need to know