- Sun Sep 11, 2016 6:42 pm
#6690
In an effort to address my bullets warm starting problems I removed the carb yesterday and gave it a good looking at. I blew through every accessible orifice and sprayed wd40 through the remainder. All seemed clear, with the exception of the tiny horizontal passageway, visible from the air intake end at the bottom of the bore. I managed to clear this by blowing through the main jet whilst blocking all other holes with my fingers.( A bit like playing the recorder!) Pilot and main jets were removed and inspected, and found to be clear, as was the float needle valve. Finally the carb (Micarb) was re-assembled and put back on the bike (500 iron barrel). After a few kicks the engine started but ran rough and wouldn't respond to either mixture adjustment of the pilot air screw ,nor throttle stop screw. The cold start/choke lever made no difference either. I ventured for a short ride around the block. Awful. After an overnight rest I had another look at the carb (off the bike) and couldn't find anything obviously amiss, except the float height was only measuring 19mm from bottom to carb body when in the closed position. I kept this in mind, but left things alone as I was careful not to handle the mechanism roughly during the previous days attempt. With carb back on I started the engine (four or five kicks) and found no improvement, but did notice black smoke from the exhaust. Aha! Mixture excessively rich, I thought, and set about adjusting the float height to the recommended 24/26mm. You've guessed it, Now it won't start at all. I obviously did something wrong during the initial cleaning/re-assembly exercise. Any ideas gentlemen.
