[buff]

If someone out ther has a manuel for this bike, please look to see if there is a idle air/fuel mixture adjusting screw on the rear carb. The spark plug is white and the front cylinder plug is perfect. The rear cylinder backfires at idle. Please help?????

 

[DrBob]

mixture screw

The adjustment screw for the rear carb is on the right side of the bike, just behind the throttle assembly at the carb. It has an ‘O’-shaped brass plug covering it, so if you want to adjust the screw you will need to use a drill and drill bit to enlarge the hole in the plug to access the screw. Don’t drill too deep, or you’ll damage the screw. Screw a large sheet metal screw into the brass plug as tight as you can, and them pull it off with some pliers, thus removing the plug. You can then adjust the mixture screw underneath it.