600 jet issue i think

8 replies to this topic
  • brad4001

Posted March 18, 2008 - 07:34 PM


Ok guys my brother picked up a 87xr600. It wasnt running but I found out the stator was bad so I rewraped it. Well now when we ride the bike it cuts out then it come back and then out, if you roll on the gas just a 1/4 of the way it runs smooth but as soon as you go further it cuts in and out. I cleaned the carbs but there wasnt anything there but I did notice that the jets seemed lean. The main is 122, pilot is 45, and the air screw is 1 turn out from the bottom. The only thing the bike has done to it is a white brothers slip on disk muffler.
Any ideas would be great

  • Kenzo

Posted March 19, 2008 - 05:21 AM


seems under-jetted, some great info can be found here...


i did a lot of research on XR's before i found a gud deal and bought an "L"


  • Motosprtman

Posted March 19, 2008 - 12:29 PM


Dynojet still sells a re-jet kit for the XR/XL600R.

  • KJG15

Posted March 19, 2008 - 05:59 PM


this is brad on my bros account. so you guys think that would cause what is happing?

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  • resurrection

Posted March 19, 2008 - 06:53 PM


Don't overlook spark isues

  • HeadTrauma

Posted March 19, 2008 - 09:53 PM


At least 50% of carburetor problems are caused by the ignition system. :confused:

  • KJG15

Posted March 20, 2008 - 04:10 PM


ok thanks guys ill look in to the spark and see. what size jets do you guys think well need? im in CA at sea level.

  • resurrection

Posted March 20, 2008 - 09:46 PM


I've seen alot of wolod out wire ends cut it off after unscrewing it and srew it back on tight

  • Motosprtman

Posted March 21, 2008 - 10:51 AM


The DJ kit that I am installin now in a XL600R comes with a 128 main in the left carb and a 132 in the right and the needles with the e-clip in the top groove, go with a 65 pilot (stock is 62 although some hgad 65's in em) and run the air fuel screw 2 turns out. Make sure the air box is clean and opened up and the filter is also clean. If you get into raising the needles a notch - make not of the position of the return spring, because you will have to reset it into the same position. NOT fun. I am still in work on mine...

I am hoping this rejet on my XL600R makes as much difference as it does when you uncork an XR650L.

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