Question about 1985 Honda VT 500 C Shadow
Hello I have a 1986 honda shadow vt500c I am nearly at my wits end with this thing. as long as I baby the throttle it's fine but while in neutral if you crank the throttle with any force theres a hesitation and then a dramatic pick up. if you go quickly from none to full throttle it bogs and turns off. carb mounts seem to be good as I sprayed them with electrical contact cleaner and there was no rpm increase. could leaks in the airbox cause this?
If your bike has carbs and not fuel injection, ( difficult to remember back 23 years ago ), then remove the carb slides and move the clip on the jet needle down one notch. This will richen the low end mix and provide it sooner. You may need to go two notches but start with one notch. Also, sync the carbs such that the slides on both carbs move at the same exact instant when the throttle is slowly turned from idle speed < engine off. Clean the carbs when you get a chance.
Please rate this solution. Thanks Cindi!
Posted on Apr 30, 2009
I had a similar issue with my 85, I hope this helps , first do you have excess oil in the bottom of your airbox , mine did and it runed the air filter , are you draining the blow off tank ? I put in a new airfilter and used a tin of carb clean to clean out the carbs , when the bike is running crankcase blow off from the botton of the airbox blow excess oil up in the intake .. I cut a piece of plasitc about 2 in square and bent one end at at 45% and expoxed into the airbox SO THAT THE OIL WITH NOT HIT THE AIRFILTER DO NOT SEAL OFF THE HOLE . while you are cleaning the carbs with the cleaner open the choke a bit to clean the choke jets a bit as well , also check a plug from each cylinder are they black and sooty , this would be an indication of two rich as a result of bad airflow casued by pluggged airfilter ....
Posted on May 07, 2009
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