1982 GS650GL Carb Question

[white94cam]

Hello everyone, first post for me.

I am the new owner of a 1982 GS650G. Turns over but doesn't run. Runs for a few seconds if starter fluid is sprayed in the air box, so I'm assuming it isn't getting any fuel from the carbs.

I read this thread (http://www.thegsresources.com/_forum/showthread.php?t=210175) which helped me a little. I twisted the petcock to "PRI" and gas started leaking from my carbs, so I know I need new O-rings from cycleorings.com. If I'm correct, I have the Mikuni BS series. I also plan on getting the 38mm O-rings and 16mm screws for the intake boots, just in case. My total is $25.75 shipped for all the aforementioned parts, not bad!

Any other troubleshooting tips before I tear these carbs off? Any other parts I should buy now, just in case? Let me know, thanks!

PS, I already have the CV Carb Rebuild Tutorial (http://www.mtsac.edu/~cliff/storage/gs/Mikuni_BS-CV_Carburetor_Rebuild_Tutorial.pdf) saved on my PC.

 

[tom203]

Welcome, carb removal and reinstall is no fun on this critter, so follow the carb cleaning tutorial religiously and you might not have to play with them again for long time. Understand that the tiny passages get easily clogged from sitting in gunk
Stock airbox ?, stock exhaust?

 

[white94cam]

Welcome, carb removal and reinstall is no fun on this critter, so follow the carb cleaning tutorial religiously and you might not have to play with them again for long time. Understand that the tiny passages get easily clogged from sitting in gunk
Stock airbox ?, stock exhaust?

As far as I know, everything is stock aside from the paint. I saw in the BikeCliff welcome that the airbox and air filter sealing are important. Mine does not have the clamp to keep it sealed closed (someone used zip ties). I guess I should research that as well.

 

[Guest]

Welcome to the site... Nice bikes thgose 650's. I've had a couple over the years & liked them.

I would also plan on doing a valve adjustment too - get that done while you're waiting for your parts. Check BikeCliffs site for a tutorial on that; you'll need a new valve cover gasket most likely.

http://members.dslextreme.com/users/bikecliff/


So, tell us a bit more about your bike & where you're located, pics are always welcome too!

Mileage?
Known issues?
Mods?
Maintenance done?


Download yourself the GS650G service manual at BikeCliffs site as well...

 

[white94cam]

Welcome to the site... Nice bikes thgose 650's. I've had a couple over the years & liked them.

I would also plan on doing a valve adjustment too - get that done while you're waiting for your parts. Check BikeCliffs site for a tutorial on that; you'll need a new valve cover gasket most likely.

http://members.dslextreme.com/users/bikecliff/


So, tell us a bit more about your bike & where you're located, pics are always welcome too!

Mileage?
Known issues?
Mods?
Maintenance done?


Download yourself the GS650G service manual at BikeCliffs site as well...

Thanks for the recommendation! I'm in Clarksville, TN. Picked the bike up off of Craigslist, but he already took the ad down so I can't copy his pictures (I haven't taken any). 23,XXX miles. It's a little beat up around the edges. Painted 2012 Camaro green. No maintenance done that I know of (I'll be doing all that shortly) and the mods are very minimal (removed grab bar, different blinkers, paint, grips, etc.). That's all I know for now - still trying to learn more.

 

[Guest]

Yes, your bike is not a true "L" model (which most here would be thrilled about), as it looks to have been "de-L'ed" a bit.

The front forks are not the L model, they aren't leading axle, and they have dual calipers (the L has only a single caliper).

The rear looks like it was modified, doesn't look like the standard G or L model.

(BTW, the "G" designation simply denotes shaft drive)

The fuel tank appears to be an L model tank.

The seat looks like the G model.

The bars are certainly not the L buckhorns...

However, that bike looks very nice to me - the 650 has plenty of pep & handles quite well, good luck with it.

Plenty of knowledge here about all things GS - don't be afraid to ask questions...

 

[white94cam]

Yes, your bike is not a true "L" model (which most here would be thrilled about), as it looks to have been "de-L'ed" a bit.

The front forks are not the L model, they aren't leading axle, and they have dual calipers (the L has only a single caliper).

The rear looks like it was modified, doesn't look like the standard G or L model.

(BTW, the "G" designation simply denotes shaft drive)

The fuel tank appears to be an L model tank.

The seat looks like the G model.

The bars are certainly not the L buckhorns...

However, that bike looks very nice to me - the 650 has plenty of pep & handles quite well, good luck with it.

Plenty of knowledge here about all things GS - don't be afraid to ask questions...

Thank you for your help! I had no idea about the mixing/matching of parts that the previous owner had done. I noticed the dual-disc setup in the front, but I wasn't sure if it was factory or swapped. I like how it looks, too - I just need to get it running!
Also, it came with the factory grab bar, turn signals, etc. Also came with a larger gas tank (not sure what it's from, it's a Suzuki tank though).

I'm anxious to ride it. I've had four previous motorcycles (ZX-6R, ZX-6RR, ZX-6R 636, F4i) and I'm curious to see how this one rides. I like the vintage look and I'm glad to have something that will be more comfortable.

 

[Steve]

Definitely does not look like a 650L.

The one linked in my sig is my son's version of a 650L, with a few additions.

It is also green, just a different shade.

.

 

[tkent02]

Pretty sure it's a straight 650G, with an L tank. I have the correct tank for the G if you are interested.

 

[white94cam]

Update: Took off the tank and noticed a few things. First, the vacuum port on carb #2 didn't have a hose on it. This is the hose that runs to the petcock, if I am correct (based on this link http://members.dslextreme.com/users/storagecliff/images/hose_locations.html). My fuel line (from tank to carbs) appears to be old/cracked/brittle, so that may have been the source of my leak when I set the petcock to PRI. I will replace this hose and the petcock hose today.

In addition, the carb that holds the linkage which connects to the throttle had three loose top cover screws. They have been tightened.

I'm hoping that the lack of the petcock-to-#2 carb vacuum port hose was keeping the tank from supplying the carbs with fuel. Thoughts?

 

[tom203]

Well, I'm hoping that you'll bite the bullet and opt for full proper carb clean rather than look/hope/pray for shortcut-sounds like a PO has messed with things, so best to assume it was done wrong. Find out now and correct things to avoid mega frustration.

 

[white94cam]

Well, I'm hoping that you'll bite the bullet and opt for full proper carb clean rather than look/hope/pray for shortcut-sounds like a PO has messed with things, so best to assume it was done wrong. Find out now and correct things to avoid mega frustration.

I already ordered all of the o-rings and whatnot from cycleorings.com. I'm still doing the proper carb clean. While I'm waiting for them to arrive, I am trying to fix other problems, such as missing vacuum hoses, sealing the airbox, etc.

Any idea where I can find an airbox clamp? Mine has holes drilled in it with zip ties.

 

[tom203]

The band clamp that holds airfilter box to airbox???

While you deal with carbs, lots of other issues to check- have you see these comments from bwringer regarding common issues?

http://members.dslextreme.com/users/bikecliff/images/GSR_Greeting.html


absolutely check valve clearances and make sure auto camchain tensioner is working - with carbs off, this is easy

 

[white94cam]

The band clamp that holds airfilter box to airbox???

While you deal with carbs, lots of other issues to check- have you see these comments from bwringer regarding common issues?

http://members.dslextreme.com/users/bikecliff/images/GSR_Greeting.html


absolutely check valve clearances and make sure auto camchain tensioner is working - with carbs off, this is easy

I'm referring to the door that is removed to replace the filter. The door/cover is held on by zip ties. The top of the box looks like there is supposed to be a clamp on it. Also, yes, I have read the list of common issues.

Found a pic:

It's the rectangular piece near the top left corner of the pic. Has two small dots on it. Looks like it keeps the cover of the airbox connected.

Just replaced the vacuum line from petcock to #2 carb. No change, still won't start. Seems like the engine turns over slightly quicker if I twist the throttle a little bit. I'm nearly 100% positive the carbs need a good cleaning.

 

[tom203]

There are two "sliders" that hold filter cover on- one on top and one on bottom. part #13 in this fiche link- apparently still available at suzuki dealer.
http://www.alpha-sports.com/spst/1982 GS650G/01.htm?q=suzuki-parts

Note that diagram is oriented wrong

Unless petcock looks newish,Do yourself a favor and just replace petcock ( $50 or so ) and eliminate it as a problem and focus on carbs.

 

[white94cam]

There are two "sliders" that hold filter cover on- one on top and one on bottom. part #13 in this fiche link- apparently still available at suzuki dealer.
http://www.alpha-sports.com/spst/1982 GS650G/01.htm?q=suzuki-parts

Note that diagram is oriented wrong

Unless petcock looks newish,Do yourself a favor and just replace petcock ( $50 or so ) and eliminate it as a problem and focus on carbs.

Thank you for the link - got some sliders ordered. The petcock seems to be okay, and seems to be releasing fuel to the carbs. I'll probably order one after I get the carbs cleaned and reinstalled.

 

[white94cam]

So I decided to leave the vacuum hose hooked up (carb to petcock) but unhook the gas line from the tank. Figured if it was getting vacuum, fuel would spill out the tank while I tried to start the bike. No fuel came out. This means I either have no vacuum (doubtful), or a bad petcock, I assume?

 

[tkent02]

Test it. Suck on the vacuum hose, fuel should come out the fuel hose. Stop sucking, fuel should stop coming out the other hose. If you get fuel in the vacuum hose, the diaphragm is leaking....

You can use a mighty vac or syringe or similar to suck if you want to.

 

[Steve]

Thank you for the link - got some sliders ordered.

Hopefully you did not order from that source. :-k

If you did, chalone lesson learned. Alpha Sports happens to be the MOST expensive site around, charging 10-15% ABOVE retail, while others charge 10-20% BELOW retail.

We only keep referring to Alpha bcause they have some very nice pictures in the parts fiche and they also have a very nice progression of superceded part numbers, when necessary. Oh, yeah, they also have a decent "what bikes did that part number fit?" search feature.

If you have gotten your welome package from BassCliff, there is a list of vendors there that are MUCH more preferred.

Just as an example, for that part #13:
Alpha Sports - $2.97
Bike Bandit - $2.42 (they claim retail price is $2.42)
Boulevard Suzuki - $1.57 (they claim retail price is $2.20)
G&S Suzuki - $1.62 (they claim retail price is $2.20)

Fortunately there was not much money involved this time around, but the principle is the same. :-\\\

.

 

[tom203]

Hopefully you did not order from that source. :-k

.

I was trying to stimulate Maine economy! Yeah, lots of their prices are silly, but Alpha Sports is local to me and they are nice people to deal with direct.