Mar 16, 2007
471
0
ok so I just got a xr 50 with a 88cc kit on it. i took it out riding yesterday and everything was fine. Today i took it out and the bike idles but if i gas it....it dies. if i roll the throttle on smoothly its ok but if i punch it...it dies. any ideas whats wrong? :whoa:
 
Mar 16, 2007
471
0
cool, what do you think would cause it to do that? it was fine one day than the next its not running properly. im not too sure where the pilot screw is. im going to take a pic with my digi cam and post it in there so you guys could tell me where it is. thanks!
 
Mar 16, 2007
471
0
ok guys where is the pilot screw? is it next to the choke? sorry the one picture is so blurry, theres a screw next to the choke but theres no way to turn it with a screwdriver its this screw that sticks out and has a small hole on one side of it. and the other pic is upside down. i played with the idle screw and the screw next to that. it didnt do anything though.



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76GMC1500

Uhhh...
Oct 19, 2006
2,142
1
Pilot screw is top right in second picture. Make 1/4 to 1/2 turn adjustments. In this case, probably out. I usually start by running it in until it bottoms out and counting the turns so I can return it to its original position if I'm not satisfied with the changes. Your pilot jet may also be plugged which would explain the sudden change.
 

IndyMX

Crash Test Dummy
~SPONSOR~
Jul 18, 2006
5,548
2
Amo, IN
In the future, try backing up a bit.. Those point & shoot cameras need about 3 feet between subject and lens to focus properly...

Hard to really see much in that shot.
 

hot125mod

Member
Jan 14, 2007
501
0
on the xr it would lean out if you turn it out just like a two-stroke. MX and performance off-road 4-strokes with accelerator pumps have a fuel screw meaning by turning it out allows more fuel. it is the opposite.
 
Last edited:
Mar 16, 2007
471
0
when i turn it out, the bike doesnt idle anymore. I than increased the idle speed or rate or whatever and the bike idled fine but it still bogs and dies when i punch the throttle.
 

76GMC1500

Uhhh...
Oct 19, 2006
2,142
1
Well, if turning it out makes it worse, try turning it in. Make sure it's the right screw, the idle speed adjusting screw is in the middle of the carburetor and in the middle of the 2nd picture. The pilot air screw is in the upper right corner of the 2nd picture.
 

helio lucas

~SPONSOR~
Jun 20, 2007
1,020
0
have you clean the carb? sounds like dirty carb...
 
Mar 16, 2007
471
0
yeah, well i took off the bottom part which is the float bowl right? so i put the carb back to its stock settings, gave it a full tank of gas and the bike runs ok. the bog is still there when i punch it but not as bad.
 
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