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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> High rev during idle after battery change /cgi-bin/YaBB.pl?num=1568346183 Message started by AshBrick on 09/12/19 at 20:43:03 |
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Title: High rev during idle after battery change Post by AshBrick on 09/12/19 at 20:43:03 Hey there! Please help! I just bought a 2003 Suzuki Savage LS650 and haven't been able to ride it yet :-/ My Issue: I took the battery out earlier to get it charged because the bike wouldn't start. Now it starts but as soon as it starts up it revs really high and shakes :o. This is without me even touching the throttle. When I do touch it, it just revs more. Constant, steady rev... doesn't go up and down at all. No backfiring or sputtering. I've been Googling and reading the Clymer's manual all day and spoke to a friend who works on motorcycles of his own. This is what I've tried and nothing has worked yet -loosening the throttle cable a bit -messing with the choke (didn't matter if it was all the way in, all the way out, halfway... started up and revved the same) -tried turning the idle adjust screw counterclockwise first :o.. didn't work -tried turning the idle adjust screw clockwise and it didn't work I'm not sure what to try to get it to stop revving so aggressively. Do you guys have any ideas for things I can try? Some background info: I just bought it a few days ago. It's the first motorcycle I've ever owned. I've never worked on a bike or any other vehicle. But I'm dying to learn, and I'm pretty competent. I felt accomplished getting the battery out and back in this morning ;D . I have a bunch of tools at available for me to use so I'm open to any and all suggestions for solutions! The guy I bought it from said he knows nothing about engines and on my way to pick it up he told me the battery was dead but confessed that he had no idea what he was doing. He said he hadn't driven it in a couple of weeks. He drove it over to my house without issues though, was able to shift just fine and everything seemed legit. Got it to the house, put it in the shed and didn't touch it again until today (bought it 2 days ago). It wouldn't start this morning and I figured out that it was the battery. So, I took it out and went to get it charged. The battery was good to go after a few hours of a trickle charge, so I reinstalled it. Now it starts well and immediately. It's just loud AF and revs way too much. There's no rpm gauge so I can't tell how many rpms it's at while high revving but it's up there, and the bike didn't' sound like this when the guy I bought it from had it running before dropping it off at my house. So... Any ideas as to what it could be??? :-[ I don't know what else to try :-/ I'm looking forward to some insight! :) Thanks in advance |
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Title: Re: High rev during idle after battery change Post by verslagen1 on 09/12/19 at 21:02:25 I can tell you definitely... somethings wrong. Can't tell you what it is as I would be violating the initiation code. But I would do as you did, check the cable, sometimes they get pulled and in doing so, one of the ferrules gets pulled out of the socket and yes it will rev high. But usually, that makes them hard to start. So don't know. Could be an air leak, somewhere between the carb and head. maybe you pulled the vac line off the carb. pretty sure, when you find it... it'll be obvious. |
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Title: Re: High rev during idle after battery change Post by batman on 09/13/19 at 04:54:31 It could be the carb slide is hanging up . You could remove the rubber hose that runs between the air filter box and the inlet to the carb ,reach your finger inside the carb and push up on the round slide ,it should move up and down freely and smoothly . (it is moved by vacuum and not by the throttle cable ) if it hangs up the main jet stays open and will provide a very rich fuel mixture (high revs) . the fact that moving your choke doesn't seem to affect the motor speed ,makes me think this is your problem ,as the main jet is the only place the extra fuel could come from . If I'm right you'll need to pull and clean the carb ,normal for a bike that's been setting for a while .you could also try tapping lightly on the bottom of the carb (bowl) to see if the float is hanging up ,this could flood the bowl and cause the level to rise up through the main jet area and also provide extra fuel and higher revs. good luck! |
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Title: Re: High rev during idle after battery change Post by Gary_in_NJ on 09/13/19 at 05:48:51 Throttle cable or slide...or vacuum leak. Make sure that the front side of the carb is fully seated in the rubber boot. |
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Title: Re: High rev during idle after battery change Post by stewmills on 09/13/19 at 06:50:23 +1...I would make sure there are no binds or kinks in the throttle cable and if it looks crummy anywhere lubricate it. Agree that s sticky slide can be a possibility as well. Doesn't take much to make one stick if crud somehow got sucked in past the air filter. Also, I don't think you mentioned the air/mix screw (right-side of the carb). If this was turned all of the way in or out it could impact the idle if the previous owner tried to mess with this and was not aware of the instructions on how to properly adjust it (it's easy). Are you familiar with where the air/mix screw is and can you tell of the brass plug has been removed where it could have been monkeyed with? In this image it is labeled "Idle Mixture". The screw is down in that hole. Very soft brass screw with flat head. Be nice to it...it will damage and strip if you are aggressive with it and don't screw it in super tight when adjusting...as soon as you feel resistance with light finger pressure STOP. |
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Title: Re: High rev during idle after battery change Post by justin_o_guy2 on 09/13/19 at 07:46:42 It certainly could be the slide, but the first thing I'd look at is the idle speed adjuster. Look on the carburetor where the cable wraps onto the plate. There's a knurled screw. If it's screwed in too far it will hold the idle high. If that's not it and the cable that is wrapped on that plate isn't holding it rotated CCW, then I'd be pulling the rubber covering the intake and having a look at the slide. |
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Title: Re: High rev during idle after battery change Post by AshBrick on 09/14/19 at 15:10:52 Alright, it's been a busy few days working on this... I tried your suggestions though: -I loosened the idle speed adjuster -checked the throttle cable for binds and kinks, found none -I tried messing with the air/mix screw on the right side of the carb (tightened it and then rotated it CCW for 2 full turns to start, when that didn't work I loosened it more, that didn't work either, so I tried tightening it.. which made the bike shake more) -discovered that I don't have a vacuum line because the petcock was upgraded to a Raptor :-?, so there's just a nipple on the right side -I took the carb out, took it apart and cleaned it.. looked pretty good, wasn't really gunky, float was good (no holes or cracks), remounted the carb and the rubber boots are good and secure I know A LOT more about some mechanical things now :), but it's still revving high after startup..as soon as I start it you can hear the RPM escalate quickly and sends strong vibrations through the handle bars and seat without me touching the throttle. Seemed a bit better after I remounted the carb but it's still doing too much... Aside from trying to figure out what the slide is ;D and how to adjust that... What's a slide? And how do I check that? ::) I'm not sure what else to try :-/ Any more suggestions??? It sounded and felt find when I sat on it before the guy I bought it from drove it over here (right after I sat on it). Then two days later I couldn't start it, so I took the battery out, charged it and put it back in and it was revving high... so it had to be something I did, right? :-? |
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Title: Re: High rev during idle after battery change Post by verslagen1 on 09/14/19 at 15:14:46 56647F55657E747C170 wrote:
You need to cap that nipple. |
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Title: Re: High rev during idle after battery change Post by AshBrick on 09/14/19 at 16:03:20 There was a cap on the nipple (picture), but I ran out and grabbed a new one just in case this one was faulty for some reason. The old one did look a little rough and cracked... new nipple cover didn't help. Still revving high when I start it up. :-/ |
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Title: Re: High rev during idle after battery change Post by justin_o_guy2 on 09/14/19 at 16:19:41 Idle speed adjuster isn't the idle air. Make sure that knurled adjuster on the left side isn't screwed in too far and the throttle cable isn't holding the carburetor open. Then it's time to eyeball into the carb throat.Just look up in there.. |
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Title: Re: High rev during idle after battery change Post by Gary_in_NJ on 09/15/19 at 06:08:44 Let’s go back to the beginning. Before you removed the battery the bike worked fine. How did you remove and replace the battery? Was there anything that gave you trouble that caused you to move or remove something that was in the way? |
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Title: Re: High rev during idle after battery change Post by ohiomoto on 09/16/19 at 06:37:41 I'm with Gary. If the guy rode it to your house and it was running fine, then you must have done something to pinch the throttle cable or who knows what. Or the bike always has a high idle when cold and they guy warmed it up enough on the ride over to mask the condition. For this to happen you would have to have a bad air leak and a very rich pilot jet. Seems unlikely. |
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Title: Re: High rev during idle after battery change Post by AshBrick on 09/16/19 at 08:19:40 -Back to the Beginning: When I started the bike for the first time it was dying and wouldn't start. It had enough juice to turn the light on but wouldn't fully start and was trying its little heart out. The guy told me that he thought the battery died but he got it working before I'd arrived to pick it up. At that point it did sound like it was running fine. It wasn't revving high while idling and didn't shake when I sat on it. I totally forgot to ask him about how he got it started and about the battery because I was so darn excited about the freakin bike. Yes, I know I was a dumbass. -Battery Removal, Charge and Replacement: Fast forward to 2 days later, when I take the battery out, get it charged and put it back in. I didn't know anything and had no idea what I was doing but I was being careful not to mess with anything other than the battery. I took it out by removing the seat, then I unscrewed the negative terminal-- had to put the screwdriver at an angle so I could leave all the wires alone. That box connected to wires that sits under the cover by the battery on the side kinda fell loose so I tried to prop it up so it wouldn't just be hanging there. Then unscrewed the positive terminal. Wasn't much in the way. Slid the battery out carefully. It was easy to get it back in.. nothing much in my way then either. If I had to nudge a cable out of the way I tried to be super careful, and I've gone back since and checked anything I could have touched and made sure it was securely attached. -No air filter *** I forgot to mention that I found out there wasn't an air filter in there though! He gave me an "extra" one that was brand new he said he'd bought and hadn't used. So, I put that in after the bike had already started revving high. Obviously it didn't help. Idle Mixture Screw and Backfire: Yesterday, I tried adjusting the idle mixture screw again. I first adjusted it after remounting the carb (turned it CW until I felt resistance and it was tight, then turned it 2 full turns CCW for factory settings. Still revved high no start-up though). So, yesterday after looking it up I found out that if you turn it all the way to the right it should kill the engine because it cuts off the fuel supply. I started the bike and gently turned it all the way to the right and the bike idled slightly less rough (SLIGHTLY), and ended up backfiring... still revving high though and wasn't even close to shutting off. Idle Speed Adjuster: I also messed with the idle speed adjuster again, and tightening, nor loosening helped. Throttle Cable: I've tried loosening the throttle cable (but only toward the bottom where the cam and nuts are... loosened the nuts until the little cam dropped a bit. Also didn't help. Am I not doing that right?) :oIt wasn't backfiring before, so I feel like I'm just messing stuff up at this point. Trying to be as detailed as possible so I can give you a good picture of what's going on :-[. I live in Knoxville, TN if anyone knows a legit mechanic that might be able to help me out it would be greatly appreciated. |
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Title: Re: High rev during idle after battery change Post by Gary_in_NJ on 09/16/19 at 08:31:49 OK, so you have no prior history with this bike with a cold start. The LS650 uses a CV (constant velocity) carb. The throttle cable isn't attached to the slide, it operates the throttle plate at the face of the venturi. I'm half thinking that the throttle plate is not returning to its idle position or there is something obstructing its movement. I'd remove the throttle cable and try a restart. If you still have a runaway idle then remove the carb and observe the movement of the throttle plate. It should move smoothly and nearly fully block off the carb opening. |
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Title: Re: High rev during idle after battery change Post by verslagen1 on 09/16/19 at 09:01:53 From your carb pict, the only thing I see wrong is the Idle mixture screw looks flush with the surface. This should be recessed by 1/4" because they come stock with a cap over it to prevent adjustment. (guesstimate) Pict in reply #8 |
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Title: Re: High rev during idle after battery change Post by stewmills on 09/16/19 at 10:34:24 AGree with versy...that air/mix screw looks super-far out. You can remove it all of the way and inspect it for damage, etc. Here is what is should look like and also this is the order that things go back in. |
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Title: Re: High rev during idle after battery change Post by AshBrick on 09/17/19 at 13:48:55 Thank you guys for all the help! I really appreciate all of the input and your patience as I try to figure this out! I took my air/mix screw out after removing the carb and found that there is NO spring >:( and the little black rubber washer was stuck in there. Could the lack of a spring be my issue? I checked my slide and it's good -- mostly covering the opening and sounds like it has good suction when I lift it. |
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Title: Re: High rev during idle after battery change Post by norm92de on 09/17/19 at 16:30:17 You need to put a new spring on it. The spring provides friction to prevent it from moving on its own. Ron Ayers will probably have it but you may have to buy an assembly. |
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Title: Re: High rev during idle after battery change Post by stewmills on 09/18/19 at 06:56:10 LOOK closely. My image is the exact stock part from my bike. A 2008. You have a 2003. If I am not mistaken the carbs on these years are the same and your air/mix screw should be the same. Online parts reference says they are the same part #. I am curious if the previous owner replaced this with some aftermarket part that is causing you this headache. Looks highly suspicious to me. A lot of times people strip out the brass head on these screws when removing the brass plug (they drill into the screw head) and if that happened, that would be a reason someone would have thrown something different in there that looked like it fit but may be slightly different. 3D3C213E6A613736530 wrote:
If you liked it then you shoulda put a spring on it. Sorry...couldn't resist. ;D ;D ;D |
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Title: Re: High rev during idle after battery change Post by batman on 09/19/19 at 17:06:07 There are no nuts on the bottom of the throttle cable to loosen! You may be adjusting the decompression cable , ! make sure that the hard bend(in the outside ) in the cable is fully seated in the round recess(about 1/2 "deep) , just above the carb throttle shaft, otherwise the cable won't allow the carb to fully close -high idle!) the only adjustment in the throttle cable is in the outside cable ,up near the hand lever . |
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Title: Re: High rev during idle after battery change Post by AshBrick on 09/25/19 at 10:39:34 I finally got the bike running! It was the air/mix screw. I had to order a whole new set with the right screw (the one in there was definitely the wrong one, so good call!). I'll check out the throttle situation... :-/ Thank you everyone for helping me problem-solve! :) Felt good to finally ride! 8-) |
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