I am going to try a bit richer on the main & the pilot, also check the valves. What does the diaphragm on the side of the carb do? It appears to be some sort of a switch, one end of it connects down to the oil pump, and the other "Y" goes to in front of the butterfly. What does this control / accomplish? Also if you happened to know the valve clearances that would be great.
I have had many bikes, but this is my first true thumper, Currently also have an 85DR200, but I get up into the foothills and 7000 feet, and the little DR doesn't have much left up there. I had a 92 ZX11 but was doing more and more riding on the DR, so I got a straight across trade for the 98 XR650L but with the miss. The carb had some residue in it, but the problem is still there, the air idle cleaned up the miss on low end, so I figured richen up the main & pilot, see what happens, for the cost of a couple of jets. The bike "appears" to be in good shape, but after close examination, a few heli coils here and there, some one had welded on the frame, making me question the CDI (Quickest way to nuke a Ho2 sensor on a car), but I scoped that and it looks good.
|