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About (Sidecar) Bob Kingsmill
Expertise
I HAVE NO EXPERIENCE WITH HARELYS. ATVs ARE NOT MOTORCYCLES. DO NOT ASK ME ABOUT THEM. DON'T ASK UNLESS YOU HAVE LOOKED IN THE SHOP MANUAL FIRST - IT ONLY ROBS SOMEONE WITH A REAL QUESTION OF THE OPPORTUNITY. You can ask me electrical questions about 1975-85 HONDAS. You can ask me about driving sidecars in the winter, or sidecars in general. You can ask me general motorcycle repair questions, but my main experience is with Honda CX500, GL500, CX650, GL650, GL1000 and GL1100 models. I also know a bit about the Suzuki GS400 and 1980s Dneprs, but I haven't touched either in years. If you ask about a model I am not familiar with I will do my best to find your answer.

Experience
I have been operating and maintaining Honda motorcycles since 1991 and other types since 1985. I have access to several online usergroups that specialize in keeping these types of bikes roadworthy and am considered an expert in some areas, particularly electrical/wiring matters. I have been using sidecars for everyday winter transportation in Southern Ontario since 1987 except for 2 winters on a trike. I have learned how to make this a relatively comfortable activity and how to prepare the machine so that it survives the road salt.

Organizations
Naked Gold Wings; Honda Transverse Twins of America

Education/Credentials
Electronics & acoustics technician. Correspondence courses in motorcycle repair & small engines.

 
   

You are here:  Experts > Shopping > Motorcycles > Motorcycle Repair > Cant get my motorcycle to stay running

Motorcycle Repair - Cant get my motorcycle to stay running


Expert: (Sidecar) Bob Kingsmill - 12/9/2008

Question
my bike is a 1980 GS550L suzuki i just got brand new carbs all the jets are clean. i put in brand new coals and spark plugs it will start sometimes but it will ideal 4 a sec and then the motor is flooded the carbs are not the problem i no 4 shore but can the vacuum line on the tank be constantly droppings gas if not working right ive been trying everything the only thing im thinking it is now is the vacuum line on the tank can you right this one back to me ASAP plz thank u 4 your time

Answer
It sounds like the diaphragm in the petcock is leaking.

The vacuum line goes from one carb throat to the diaphragm of the petcock. When the engine is turning over the intake suction provides vacuum on the diaphragm to open the valve. If there is a hole in the diaphragm the fuel can be drawn through it and down the vacuum line into the cylinder, flooding it.

Your dealer should be able to order a kit for rebuilding the petcock and instructions for disassembling & reassembling it should be in your shop manual.

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