Too Much Gas

[dig dug mx6]

My 195 GS700E is dumping gas through the #2 cyl. I believe I have a needle/seat problem or possibley the o-ring for the seat. I pulled the carbs and cleaned and still the same thing. I started looking for a rebuild but found out it doesn;t exist for my bike. So i would have to rebuild the carbs piece by piece which is looking to be very expensive. $32 for one needle and seat and that doens't come with the filter or o-ring.

I have also been quoted $17 for an o-ring. 8O

Anyone that can verify my diagnosis and maybe give me a good source for parts would be appreciated.

Also if the parts for the 83 750 would fit my 85 700. THe carb looks the same in my repair manual.

Thanks in advance.

 

[Jay B]

the 700 and 750 are the same. Something or the other about Suzuki lowered the CC's cause of some tax. 17 for an O ring. HA Find Robert Barr in the Members list and order a set of his O Rings. 12 Bucks for all the proper O rings for all 4 carbs. Which carbs do you have. You may be able to find rebuild kits on the net.

 

[earlfor]

A frequent problem on GS750's dumping gas through the #2 carb is a faulty fuel petcock and vacum line causing the fuel bleed though into #2. I dont know if the carb setup is the same for your bike, but to satisfy my curiosity, I would consider disconnecting the vacum and fuel lines from the carbs, putting a cup under each line and letting the bike sit overnight that way to see if there is fuel in the the cups. If there is, Its likely not the carb seals.

Earl

 

[focus frenzy]

A frequent problem on GS750's dumping gas through the #2 carb is a faulty fuel petcock and vacum line causing the fuel bleed though into #2. I dont know if the carb setup is the same for your bike, but to satisfy my curiosity, I would consider disconnecting the vacum and fuel lines from the carbs, putting a cup under each line and letting the bike sit overnight that way to see if there is fuel in the the cups. If there is, Its likely not the carb seals.

Earl

Good point Earl, if the diaphram for the petcock(sorry renda, fuel valve) has a hole in it gas will flow back down the vacume line into the intake for #2 cylender, bypassing the carburator.

 

[dig dug mx6]

I have had the gas tank off the bike for two weeks now and no gas has leaked out of the petcock so i think that is ok. The only time I have problems with the gas flooding #2 is when the bike is running. Which is why I am leaning towards the seats and needles.

I have mikuni (SP?) carbs not sure on a model number I haven't been able to find one. I have found a rebuild kit on the net for $21 but it for the 83 750 and the compnay said it wouldn't work for my 700. I am going to look more an some parts breakouts and see what is different.

 

[moto_dan]

I have had the gas tank off the bike for two weeks now and no gas has leaked out of the petcock so i think that is ok. The only time I have problems with the gas flooding #2 is when the bike is running. Which is why I am leaning towards the seats and needles.

I have mikuni (SP?) carbs not sure on a model number I haven't been able to find one. I have found a rebuild kit on the net for $21 but it for the 83 750 and the compnay said it wouldn't work for my 700. I am going to look more an some parts breakouts and see what is different.

The kit for the '83 750 will work if it is for an E or ES model. I think in '83 there was also a "T" model, but I think all the 750 16v used the same carbs and I would be very surprised if the needle and seats are different.

A quick petcock check for leaking past the diaphram is to pull off the vacuum line after shutting down your bike and notice if the line is dry. If wet then your petcock is leaking and it doesn't always show up with a bench check.

 

[dig dug mx6]

A quick petcock check for leaking past the diaphram is to pull off the vacuum line after shutting down your bike and notice if the line is dry. If wet then your petcock is leaking and it doesn't always show up with a bench check.

Well it's the petcock. I did the ultimate test. I sucked on the vacume line it relased gas throught the main gas line but i also got gas throught the vacume line. I figured that was the easist way to find out, tastes basd buyt worked well :?

Thanks for your help

 

[earlfor]

Ahhhh yes, to quaff the antediluvian aperitif and relish the delicate bouquet of a blended fossil product. I envy you.
Glad you found the problem.

Earl


[quote="dig dug mx6"
Well it's the petcock. I did the ultimate test. I sucked on the vacume line it relased gas throught the main gas line but i also got gas throught the vacume line. I figured that was the easist way to find out, tastes basd buyt worked well :?

Thanks for your help[/quote]