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GS1000 fuel tap / petcock

hampshirehog said:
Only an Antipodean could hit the nail on the head like that:-)
Click to expand...

a benefit of seeing things from the distance, i suppose :D


btw, the idea of no "reserve" position on that tap was because of the fuel gauge present in the instrument cluster - like on the cars, i guess
 
I guess that makes a little sense, however the fuel guage is no prize winner either.
 
Now I know how it's supposed to work - you have to crank the bike to initiate prime. What a POS
Click to expand...

I noticed that when the petcock is on prime, fuel will not flow out until vaccuum is applied(you crank the engine)to the petcock. Not constant vaccuum, just a little is needed to get the gas to flow. When the petcock is set to on, no gas will flow unless a constant vaccuum is present.

This is truly a strange design. On the KZ that I have, when you switch to prime the gas flows. It also has an on and a reserve position.

When I had the bike hooked up to a test tank with no petcock the bike started immediately. When I hook up the bike tank, set the petcock to on, the bike is hard to start. If I switch to prime, the bike fires right up. Once its running I can set it to ON and the bike runs fine.

Has anyone else had this problem with the 1980 petcock? Maybe the bike is supposed to be started with the petcock in the prime position and then switched to ON.
 
My 1100G's fuel gauge is kinda goofy. For some reason i seem to go MUCH longer on the top half of the gauge than the lower, in other words, i get more miles from full to half, than from half to reserve, at least according to the gauge. I believe I had heard that some of the GSs were like this because the top half of the tank is actually bigger, as in holds more capacity, than the lower. But i also heard you can futz with the gauge to get it to read what you want it to. IE you go on reserve when it says empty, or the start of the red line, or somewhere in the middle...what have you.
 
It is a strange design. There has to be a working seal within the petcock's inner workings to maintain the vacuum that was initiated when the engine was cranked over, or else, no prime. And if the teeny, tiny seal doesn't hold, again no joy.
 
TheCafeKid said:
My 1100G's fuel gauge is kinda goofy. For some reason i seem to go MUCH longer on the top half of the gauge than the lower, in other words, i get more miles from full to half, than from half to reserve, at least according to the gauge. I believe I had heard that some of the GSs were like this because the top half of the tank is actually bigger, as in holds more capacity, than the lower. But i also heard you can futz with the gauge to get it to read what you want it to. IE you go on reserve when it says empty, or the start of the red line, or somewhere in the middle...what have you.
Click to expand...
Perhaps mine has been played with as you describe. I'll fill up to half way on the guage and 10 minutes later it says empty. Something to look into. Thanks.....
 
It is a strange design. There has to be a working seal within the petcock's inner workings to maintain the vacuum that was initiated when the engine was cranked over, or else, no prime. And if the teeny, tiny seal doesn't hold, again no joy.
Click to expand...

After repeated attempts to start the bike, I have concluded that the petcock is causing my no start. I connected the test tank to the carbs and the bike fired right up. For what ever reason the bike is not getting any gas when hooked up to the petcock. I just placed an order with Z1 for a replacement so hopefully this will solve the problem.
 
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