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Discussion Starter · #1 ·
I was curious to know if anyone has ever had to replace the vacuum fuel "cutoff" switch on a 1999 750 Monster? Or any year that has one of the cut-offs? I was wanting to know how much they would be to buy a replacement for or if anyone knows where to get one on the web?

I've had many problems with sputtering, hesitating, and just plain not running. My last guess now is that either the pump is bad(I have the rebuild kit on the way) or that pesky, cut-off.

Any help would would GREATLY appreciated.

Marcus
 

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Premium Member
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Do you have a link or a write on how one would bypass the fuel cut off? I have been having the same troubles and would like to go down that route. My bike is a 98 m750.

Thanks!

David
 
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Discussion Starter · #4 ·
I unfortunately don't know of any links showing or even describing the procedure, but it can't possibly be that difficult. I went yesterday to Home Depot, picked up a couple of hose clamps and 1 each of a 1/4" & 3/8" Inside diameter brass barbed coupling. (I'm not sure which size is corredt yet) All I'm going to do is disconnect the fuel lines from the vacuum "cutoff" and use one of the couplings to bypass the cutoff. I'm going to leave the vacuum line from the intake connected to the cutoff, but I'm going to tape off or plug the ports that the fuel lines were installed.

I also have the Mikuni pump rebuild kit on the way from Manufacturer's Supply. The part # and contact info is listed on a previous posting about "Bike Died on Interstate"
 
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Discussion Starter · #6 ·
Well,

I tried to bypass my vacuum "cutoff" last night with a couple of brass fittings. (BTW, if you decide to try this, the line FROM the tank & the line TO the pump have different inside diamters-The line from the tank is 3/8", and the line to the pump is 1/4"---You have to get a reducer.) The only result I ended up with was WET spark plugs And a dead battery. It didn't even try to start. SO, I figure now that it must be either a bad fuel pump-or a carb. problem. I put some different spark plugs in it this mornings and it started right up-NO problem! But, I was scared to take itout on the road just yet. I'll get it out this afternoon and post to let you guys know how it runs.
 
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