Runs and starts good but only runs 65 to 70mph with throttle wide open
You have to clean carbs, the main jet is clogged..
SOURCE: honda 1300c backfire through carb at wide open
Try balancing ans syncronising the carbs.
BALANCE THE CARBS
Turn the throttle screw on the LEFT carb one half turn inward. Now start the engine and get it warmed up. With the engine running, remove the RIGHT spark plug wire. Adjust the idle speed on the left carb to the point where the engine just can't quite stay running and dies. Now put the loose spark plug wire back into place.
Now turn the throttle screw on the RIGHT carb one half turn inward. Restart and rev the engine. Next, remove the LEFT spark plug wire. Adjust the idle speed on the right carb to the point where the engine just can't quite stay running and dies. Now put the loose spark plug wire back into place.
Turn the idle screw on each carb EXACTLY ONE QUARTER turn outward and restart the engine. The engine will be probably be idling very fast. Adjust both the idle screws equally from this point to get to the desired idle speed.
SYNCHRONIZE THE CARBS
Remove the air filter and rubber fittings to allow you to see into the throat of both carbs. You may need a mirror to see inside. You need to be able to see the slides go up and down when you twist the throttle. Now turn the fitting where the cable goes into each carb such that there is just a bit of slack in the cable, 1/16" is plenty. Lock ONE of the cable adjusters down tight. All further adjustments will be made on the other carb.
With the motor turned off twist the throttle very slowly while looking at the slides. Both slides need to begin lifting at the exact same moment. If the slides don't raise at the exact same time then slowly twist the throttle until the locked adjuster slide just barely starts to move. Hold the throttle still and turn the adjuster on the other carb so that the slide on that carb just barely starts to move also. Now recheck the slide movement timing. Do this process until the slides on both carbs begin to raise at the EXACT same moment. Lock down the loose adjuster and re-check the slides.
Please rate this solution. Thanks!
SOURCE: 1986 honda shadow vt500c throttle hesitation.
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!
SOURCE: I have a 85 Honda Shadow vt 500. Engine is surging
did you clean all the jets good sounds like it may be in the jets and needle part of the carbs
SOURCE: honda 1300c backfire through carb at wide open
If you have used Dyno jet kit I have had a kit come through with smaller main jets than the stock ones causing it to run way to lean.
SOURCE: 2004 Honda Shadow Aero stalls
There seems to be low gas level in the float chamber of the carburator.
Clean the carburator and check the float level and reset.
With the choke 'on' and if you hit the throttle it will die because there is a restriction of the air flow to the carburator.
379 views
Usually answered in minutes!
×