I just got a 04 GS500F from dealership. The bike was slightly used (230) miles when I bought it. As I am a newbie to motorcycling and have never even driven a manual car before, I figured I was having trouble getting into gear because of improper clutch/throtling. However, I found out that when I roll on the throttle for some time (or just rev the engine) sometimes the RPM's don't come down when I release the throttle. The throttle snaps back, but the RPM's stay put and the engine sounds the same as when I rolled the throttle. I am thinking that my throttle cable is getting stuck, but I don't know for sure.  I'm going to call the dealership tomorrow and have them check it out.
This does not happen all the time on my bike, and usually I can just kill the engine wait a few seconds, restart and the RPM's are back down to normal, however sometimes it stays stuck for a long time. Also, there might be something rubbing/catching on the throttle cable which does not allow it to return normally. This would explain why this happens irregularly, but like I said I'll see what the dealership says.  
Has anyone else had similar problem or know a quick solution on how to fix this???
Thanks in advance for any help!

What are the RPM'S?  They should be around 1,100 to 1.300 when the motor is fully warmed up.  Are you sure you are using the choke correctly?  If the choke is not all the way off the RPM will be higher.  Did you get the owners manual with the bike?  Choke lever towards the rider is ON and away from the rider is OFF.

let me guess. when the engine is warmed up the rpm's hang around 3500-4000?

If so, that's common and is due to the fact that the bikes are run lean to meet emissions regulations. What I did was adjust the idel down a bit when it was revving at 3500, like down to 2000 or so. this still lets it start fine and isnt embarassing sitting at a light when the idle is up high.

The real fix for this is to take the carbs off and redo the jetting on them. The jets are little needles that meter the fuel flow inside the carburetors. You need to buy and install new, slightly bigger ones.

having said that, I had my gs500 for 16 months and didnt bother. It was fine.

If you do want to attempt it I have some links that describe how to do it. its not hard for a mechanically inclined person and everyone that does it says so. But it can be intimidating...thats why I didnt do it. that and I knew the gs was temporary until I got enough experience to upgrade...

This got me thinking.  Would this page http://pantablo500.tripod.com/id7.html apply to an '05 with stock engine?  I do get tired of messing with the choke so much when the engine is cold.  Any place to buy what is needed besides the dealer...they got me a bit ticked at the moment.

When I warm the engine up and have the choke fully in the off position the idle RPMs are 1200 as the owners manual says they should be.

If I rev the engine the RPM's go up as expected (I did this in the drive way in neutral with the choke off) I wait till they get up to about 4000-5000 RPM's then let off the throttle. The throttle snaps back to the closed position, but the RPM's stay put as though I still had the throttle on.

This also happened while driving. I was in second gear going about 20 mph. RPMs were again around 5K and the choke was fully in the off position. I got to a stop sign, and slowed, while down shifting to first. I pulled in the clutch all the way, rolled off the throttle, and applied both brakes. The bike stoped, but the RPM's were stuck at 5000. I hit the kill switch and then restarted the bike and the RPM's were back at 1200. This kept on happening while I was riding.

Thanks for the quick responses.

A couple of times, I tried to accelerate by rolling on the throttle while I was in second gear. The bike did not accelerate and the RPM's did not go up. Eventually the bike stalled out. I down shifted back to 1st, and then restarted the bike and it operated as expected. The stuck throttle doesn't happen all the time, and usually happens where the RPMs are up and won't come down, but it did happen a few times where the RPM's were down, and when I rolled on the throttle they did not come up.

The bike has a Pull-Pull throttle.  There are two cables that run from the throttle to the carbs.  One cable opens and the other closes with the help of the return spring.  I would guess that the cables are not getting stuck but it could be possible I guess.  Never heard anyone mention that here :dunno:   Sorry about the crappy pic, had to brighten it alot to get the cable detail.  Did you get any type of warranty on the bike?

Bike is still under previous warranty (I don't know if this is factory, but I think so) and the sales manager through in a 24 month extended warranty for $500 so I bought that too. I'm going to call them tomorrow and I'm sure they will fix it, I was just wondering if this was a common thing that can easily be adjusted/fixed and save me the time of sending in my new bike to the dealership.

Quote from: cobalt135This got me thinking.  Would this page http://pantablo500.tripod.com/id7.html apply to an '05 with stock engine?  I do get tired of messing with the choke so much when the engine is cold.  Any place to buy what is needed besides the dealer...they got me a bit ticked at the moment.

generally speaking it does apply but the jet sizes are different for the 01-04 models. Some info on that can also be found on my site but you should also do a search here for it as some have had better luck with different setups, and there was some question as to the accuracy of the part numbers I posted.


aevans17-its possible the cables need lubing too so definitely have dealer check it out under warranty.

Quote from: cobalt135The bike has a Pull-Pull throttle.  There are two cables that run from the throttle to the carbs.  One cable opens and the other closes with the help of the return spring.

Huh?  As far as I'm aware there's just the one throttle cable, the throttle bodies are spring-loaded and close themselves when there is no tension placed on the throttle cable.  The only other cable running to the carbs is for the choke.

Thanks for the feedback, I'll have the dealer check it out. I'm hoping that it's just a lube issue, or possible some wire/cable is getting stuck in between the spring/cable/arm assembly and not allowing it to close. It seems like this might be the problem because it doesn't always get stuck. Once the dealer fixes it, I'll post just in case anyone else runs into this.
Thanks again!!!

Adrian

Quote from: Jazzzzz

Quote from: cobalt135The bike has a Pull-Pull throttle.  There are two cables that run from the throttle to the carbs.  One cable opens and the other closes with the help of the return spring.

Huh?  As far as I'm aware there's just the one throttle cable, the throttle bodies are spring-loaded and close themselves when there is no tension placed on the throttle cable.  The only other cable running to the carbs is for the choke.

I dont know when they started using the system but I think it was within the past few years.  Maybe only '04 and '05's :dunno:

Yeah, the owners manual says there are two cables, one for opening and one for closing.

The pull-pull, dual-cable throttle setup first appeared on the '01 models.

The dealership was closed yesterday and I could not get home from work in time to take my bike up to the dealership. I wanted to ride anyway so I decided to see if I could fiddle with some of the adjustable pieces on the bike in order to see if I could get the RPM's to come down. I started with the THROTTLE STOP screw because that sounded like it somehow stops the throttle cable. At first check the screw was all the way screwed in. I warmed up the bike as the manual suggested, and then checked the idle. The idle was right around 12-1300. I let the screw out some and the idle seemed a little lower, but not much.
I cheched the throttle response next. When I rolled on the throttle it seemed to pick up a little slower, but response was still pretty smooth. I rolled off the the throttle and the RPM's came down, slowly, but actually came down unlike yesterday. I got on the bike and road for a little while. The bike seemed like it was always just above a stall when I was waiting at stop signs, but if I gave it a little throttle it didn't stall.
I pulled over in a parking lot and turned the screw back in to see if the bike was just working better today. While parked and in neutral I tried rolling on the throttle and then letting it go. RPM's stayed up and would not come down. When I pulled in the clutch the RPM's went down.
I re-adjusted the screw by letting it out some more (turning it left) and again the throttle seemed to respond better. It still feels a little sticky when I roll it on agressively, but it does come down eventually.
Can anyone tell me exactly what the throttle stop screw does? The manual only says that u use it to adjust the idle, but it seemed to improve (not completely fix, but improve) unstick my throttle. If I knew exactly what adjusting the throttle screw did, it might help me figure out what's wrong with the bike in the first place. Thanks for any help that you can provide.
Adrian
P.S. Pictures of my bike available at:
http://www.wamail.net/~aevans/SuzukiLeft.jpg  
http://www.wamail.net/~aevans/SuzukiRight.jpg

i'm assuming the screw stops the throttle when it's closing such that it's open just a tiny bit to keep it at idle instead of fully closed, which would stall the bike.

Your bike sounds like my bike when the idle adjuster was set wrong. It would very very slowly come back down from 5000rpm to 3000 or so, then stick there. I just adjusted the screw. My bike would also idle normally until I raised the RPMs. Once I got above 3000, it wouldn't come back down.

Try the idle adjust or fuel mixture screws.

ok I had the same thing happen to me with my 04 also. I would rev the engine and it would stay at around 4000 rpm even though the throttle had snapped back. Ok warm up you bike for a while and then in the engine between the carbs there should be a big white topped screw sticking out. rev your engine until it gets stuck at 4000rpm like you said then turn the screw while the engine is reved until the rpm drop back to normal. Thats how I fixed that problem on mine.

Thanks rritterson and aqxea2500. That's exactly what was happening on my bike. I tried adjusting the screw last night and it appeared to fix the problem. Did either of you have to do any other adjustments with your 04's? If so what? I'm very new to motorcycling and don't know squat about engines, other then what I've read here. The place where I took the Basic Rider Course offers 3 courses in bike maintenance and repair. I'm definitely going to take the first one which goes over oil changes, chain lube, suspension etc..., and will most likely take the next two as well, but if you know of any quick adjustments that would be nice.
Right now my bike seems to run fine, but will sometimes die at idle. I just give it a little gas and it stays alive. Should I adjust the mixture screw, and if so where is that located? Also is there one mixture screw for each carburetor???
Thanks again!

I had some alot of trouble with my 04gs500f also. It would idle and the rpm would steadily drop and it would die. so I got it the 600 mile service and it worked for a week and then it would not run without giving it tons of throttle. Then one day it just started working great all by itself, My bike is kinda retarded but its cool because it fixed itself.