help with gas switch

[dave6riv]

can someone post me a picture of the gas switch (on, res, ect) i stripped it at one point and never put in on. and i want the correct match up. i have a 2003 kat 750

[HexKrak]

Here's a link to the fiche diagram. Not sure exactly what you're looking for.

http://fiche.ronayers.com/Index.cfm/Module/Main/TypeID/26/Type/Motorcycle/MakeID/2/Make/Suzuki/YearID/44/Year/2003/ModelID/6209/Model/GSX750F_KATANA/GroupID/252325/Group/FUEL_COCK

[dave6riv]

i think it would be #10. the label of the position of the gas switch

[dave6riv]

can nobody take a picture of their fairings?

[arsenic]

[dave6riv]

thank you!

[Chris438]

I know this is a very old thread, but what exactly is the difference between on and primary??

Is there an "off" and why is it res, pri, and on???

I don't have a label on my bike... Is the switch the same on my 01 kat?

[swapdip]

Pri stands for Prime, not primary. It allows free flowing gas to enter the carbs without the engine having to be on. Normally, when the switch is on "on" or "res" (reservoir), gas is not flowing if the engine is not running. Vacuum from the engine opens a valve in the petcock when the engine is running, thus allowing fuel to flow. Prime is important after you just serviced your carbs and they are empty, and you need to fill them back up again before starting your engine.

[Chris438]

Ok so my 01 kat should be the same as that drawing.. lol... Sorry my old bike had a completly different switch. and thanks for clearing up the "pri" thing. def makes sense and good explaination.
I get why it would have prime just didnt know that "pri" meant prime. Thanks.

[Scout]

Pri stands for Prime, not primary. It allows free flowing gas to enter the carbs without the engine having to be on. Normally, when the switch is on "on" or "res" (reserve), gas is not flowing if the engine is not running. Vacuum from the engine opens a valve in the petcock when the engine is running, thus allowing fuel to flow. Prime is important after you just serviced your carbs and they are empty, and you need to fill them back up again before starting your engine.

There. Fixed it for ya.

[rolofung]

two other cases when you need to use prime:

1. the carbs will also dry up if the bike hasn't been running for a while.

2. they will also empty if you tip or drop the bike, as i once learned

[niqbales]

Also if you leave it on prime you can get very ill effects... I lived in an apartment and there is still a dark spot where I lost a gallon over a couple hours before a friend came in and said, why does your bike smell like gas and leak so much water...

[swapdip]

In theory if you leave the petcock on prime you should still not flood the carbs, float needles in good shape should make a tight seal. However if your floats are miscalibrated, or the float needles do not seat properly, then yes a petcock left on prime will flood the carbs, leak into the crank case, foul the oil and overflow in a big mess. I have a 84 ZN1100 that I leave on prime all the time because the vacuum diaphragm is all torn and I cant find a rebuild kit, altho the float needles are in such good shape that it does not flood the carbs.

[niqbales]

My carbs were a mess at the time... That's not the way I want to realize my carbs need work...

[Kreylyn]

In theory if you leave the petcock on prime you should still not flood the carbs, float needles in good shape should make a tight seal. However if your floats are miscalibrated, or the float needles do not seat properly, then yes a petcock left on prime will flood the carbs, leak into the crank case, foul the oil and overflow in a big mess. I have a 84 ZN1100 that I leave on prime all the time because the vacuum diaphragm is all torn and I cant find a rebuild kit, altho the float needles are in such good shape that it does not flood the carbs.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&_rdc=1&item=260689975947

It really only matters it's left on prime if it's sitting and not running. If it's running, then fuel is flowing anyways... But correct, the floats should prevent the tank from emptying. I definately would never rely on that though. All it takes is 1 little piece of gunk to allow a bowl to leak out.

Krey