Starting problem

[Chris Bohane]

Following a carb re-cleaning I have trouble starting my 1980 GS850.

It dosen't matter if I use choke or not the bike refuses to start.

If I blow into the breather tubes the bike starts instantly and runs well.

It is due to have a carb balance on Thursday do you think this will solve the problem or do I need to pull the carbs apart again?

Thanks in advance.

[Steve]

Carb sync (balance) and proper idle speed setting will help it immensely.

Have you primed the carbs with the petcock before trying to start?
Shouldn't need it if you have ridden within the last week or so.


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[earlfor]

If you can blow into the breather tubes and the bike starts instantly, what you are doing is compensating for lack of vacuum to draw fuel in the idle range where engine vacuum is minimal. Loss of vacuum in idle range is commonly caused by faulty intake boot "O" rings. It takes very little leakage in that rpm range to stop fuel induction. The "O" rings are located on the face of the induction tubes between the tubes and the cylinder head. You will have to remove the carbs and then the tubes from the cylinder head to access them.

E.

Following a carb re-cleaning I have trouble starting my 1980 GS850.

It dosen't matter if I use choke or not the bike refuses to start.

If I blow into the breather tubes the bike starts instantly and runs well.

It is due to have a carb balance on Thursday do you think this will solve the problem or do I need to pull the carbs apart again?

Thanks in advance.

[GS850_Coug]

If the air cleaner is not in place the bike will not start or run.:-D