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post #1 of 16 (permalink) Old 07-14-2006, 04:06 PM Thread Starter
 
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won't start

Ok Ive been having a little trouble...Ok a lot of trouble with my bike lately. It seemed like it was starting weak for a while but always started. Then one day it wouldn't start. It turned over REAL weak and then NOTHING. I rolled it and poped te clutch and she ran perfect. Then once it was warm it started fine. Then today Im out riding around and I stopped at a buddies house when I came back out it wouldn't start. I turned the key hit the starter and....NOTHING!!! no turning over didn't even try. It was almost like if I try to start the bike with out pulling in the clutch, or trying to start it in gear with the stand down. It was like the batt. was completely dead. I would just throw a new batt. in but when I turn the key on the light comes on strong and the fuel pump cycles through. All signs point towards the batt still having enough power to at least turn the motor over even if it was too week to actually start it should at least make some noise. I don't want to toss a new batt. in if thats not the problem. Anyone have any ideas of what else could be wrong? Oh my bike is an 03 GSX-R 750. Thanks guys. Also any recomendations for a batt. if I do indeed need to change it. What do they usually cost?
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post #2 of 16 (permalink) Old 07-14-2006, 04:42 PM
 
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Are all your contacts clean and tight? how about fuses for the starter?
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post #3 of 16 (permalink) Old 07-14-2006, 05:03 PM Thread Starter
 
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Quote:
Originally Posted by King Bob
Are all your contacts clean and tight? how about fuses for the starter?
Contacts look good and are nice and tight. I was wondering if there was a fuse for the starter, where would that be located. I don't have the owners manual so I can't look it up or I would.
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post #4 of 16 (permalink) Old 07-14-2006, 05:31 PM
 
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it would be in the fuse panel, which is I believe near the battery, or somewhere around there. just look for blown fuses, and replace as needed.
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post #5 of 16 (permalink) Old 07-14-2006, 06:13 PM
 
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Quote:
Originally Posted by King Bob
it would be in the fuse panel, which is I believe near the battery, or somewhere around there. just look for blown fuses, and replace as needed.
My fuse box is in the glove box (under the rear seat). Check your easily accessable storage area if it's not close to the battery.
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post #6 of 16 (permalink) Old 07-14-2006, 06:37 PM
 
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My Girlfriend had a similar problem with her 01 SV650S. She'd dropped it at a set of lights, standing still, she put her foot down, got something slippery, lost balance, and over she went. Minor cosmetic damage to the bike, and nothing more than embarrassment for her. Once she picked it up, though, the bike wouldn't start.
I was able to put a screwdriver across the terminals of the starter relay, and the bike would fire up, but nothing off the starter button. checked the kickstand switch, no change.

Eventually pulled the clutch lever off, and checked the little switch under it. worked fine, but when I put it back together, and ran a multimeter over the contacts, no joy!! It appears the clutch lever must have bent inwards about 5mm (for those non-metrics out there, about the width of 's sign). didnt stop the clutch from working, but was enough for the switch to not operate.

Check both the clutch switch and the sidestand switch. Do they operate (i.e. do you get a short across the contacts when you operate them?), and do you have power to them (may or may not be 12V, you'll need to look up your service manual for that)?
and keep us posted
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post #7 of 16 (permalink) Old 07-14-2006, 07:46 PM Thread Starter
 
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good info guys. I gotta go on a double date (its cool though because the other guy is my riding buddy) to the drive in movies right now. (GF said I can't skip it to work on the bike) But Ill check it all either tonight or in the morning and let you know what I find.
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post #8 of 16 (permalink) Old 07-15-2006, 12:16 AM
 
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If it was mine, I would put the battery on charge overnight. Fill the water level correctly in the morning. Put it in the bike and hit the starter. If the lights came on, but no cranking, I would listen for a click from the starter solenoid. It should click, if power is getting to the solenoid when the button is depressed. But there are a bunch of safety switches or wiring that can prevent power from getting to the solenoid. Time to get out the digital voltmeter.
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post #9 of 16 (permalink) Old 07-15-2006, 11:47 AM Thread Starter
 
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UMMMM OK Im not sure what the deal is here. So I threw her on the charger for about 4-5 hours......NOTHING. I left to go to the movies and left it on the charger for just a few more hours. When I got home I took it off the charger. This morning I got up and tried it.....NOTHING... Then I checked the fuses, they all looked good. Then I checked the clutch switch, and stand switch Everything looked fine to me. Before I just gave up and took it to the shop I tried one more time and she fired right up. She seems to start fine now I don't get it. I suppose I will just ride it till its suppose to rain for a few days and then run it to the shop and see what they think.
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post #10 of 16 (permalink) Old 07-15-2006, 02:30 PM
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Try jump starting it next time it does it. If it goes then its most likely the battery. This will rule out any other safety devices from causing the problem.




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post #11 of 16 (permalink) Old 07-15-2006, 02:51 PM Thread Starter
 
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yeah the first time it wouldn't start I rolled it down the hill and popped the clutch and she fired right up and rode fine. So I don't think its any of the switches. Now it seems to start ok but, now when I hit the starter I can hear the selnoid click. It wasn't clicking before, which makes me think that the batt. is about the only thing it could be. but again the head light comes on good, and all the other electrical things work just fine, but then when I hit the starter not even a click. I know it takes a decent amount of power to turn the motor over but it should at least make a noise shouldn't it? I don't know I suppose for now she runs so as long as things keep working fine Ill just ride her. If it acts up again Ill run her in to get checked out cause Im out of ideas.
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post #12 of 16 (permalink) Old 07-15-2006, 05:34 PM
 
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Good old starter solenoid. On your car, there's a thick cable carrying current to the starter motor. The same thick wire would have to go from the battery to the starter ignition switch, and back to the starter if not for the starter solenoid. Your ignition switch goes to the solenoid and switches it to let current go from the battery to the starter.

The clicking is a heavy switch in the solenoid that lets current go to your starter. On cars in the old days, you could bridge the two thick terminals on a bad starter solenoid with the handles of a pair of pliers to start the engine. The only bad thing would be to the person who is holding the pliers. Usually followed by burned hands and lots of cussing. So your solenoid could be bad, but there are too many safety switches that could be keeping energy from getting to the solenoid.
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post #13 of 16 (permalink) Old 07-15-2006, 07:12 PM Thread Starter
 
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Quote:
Originally Posted by No Worries
Good old starter solenoid. On your car, there's a thick cable carrying current to the starter motor. The same thick wire would have to go from the battery to the starter ignition switch, and back to the starter if not for the starter solenoid. Your ignition switch goes to the solenoid and switches it to let current go from the battery to the starter.

The clicking is a heavy switch in the solenoid that lets current go to your starter. On cars in the old days, you could bridge the two thick terminals on a bad starter solenoid with the handles of a pair of pliers to start the engine. The only bad thing would be to the person who is holding the pliers. Usually followed by burned hands and lots of cussing. So your solenoid could be bad, but there are too many safety switches that could be keeping energy from getting to the solenoid.
But would the solenoid not work at all one time and then magically work fine the next day? Ive had solenoids go bad on a car before but once they go they go. Theres usually no sometimes it works sometimes it doesn't. I can't seem to figure out what would be causing this, the only thing I can think of is maybe one of the fuses worked its way loose and when I checked it and put it back I got it back in all the way. Other wise I have no clue.
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post #14 of 16 (permalink) Old 07-15-2006, 08:08 PM
 
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Quote:
Originally Posted by frostz28
But would the solenoid not work at all one time and then magically work fine the next day? Ive had solenoids go bad on a car before but once they go they go...
Unlike all the plain safety switches in the path to the starter solenoid, that are on or off, the solenoid is an electromagnetic switch. It has to push around a rather big set of contacts. I have seen car solenoids stick and a hammer blow unstick them. But any switch or wire can not work at one time depending on temp, humidity, and phase of the moon.

But I still think the problem is in the safety switches. Check out a wiring diagram for your bike and count the switches that current from your starter switch has to go through before it gets to the solenoid. Mine has the neutral, clutch switch, ignition switch, and emergency stop switch. Another reason not to stall the bike at a green light.
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post #15 of 16 (permalink) Old 07-16-2006, 12:47 AM
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Quote:
Originally Posted by No Worries
Good old starter solenoid. On your car, there's a thick cable carrying current to the starter motor. The same thick wire would have to go from the battery to the starter ignition switch, and back to the starter if not for the starter solenoid. Your ignition switch goes to the solenoid and switches it to let current go from the battery to the starter.

The clicking is a heavy switch in the solenoid that lets current go to your starter. On cars in the old days, you could bridge the two thick terminals on a bad starter solenoid with the handles of a pair of pliers to start the engine. The only bad thing would be to the person who is holding the pliers. Usually followed by burned hands and lots of cussing. So your solenoid could be bad, but there are too many safety switches that could be keeping energy from getting to the solenoid.
I have used the screwdriver method... usually the plastic saves ya!




-Chris
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Was: 2002 Kaw ZX-9R
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is me till the
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post #16 of 16 (permalink) Old 07-16-2006, 10:35 AM
 
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Yeah, in my NG unit when we have a truck that won't start. First try is the Hammer on the starter (incase the solenoid is stuck), Then the screw driver.. the rubber handles are best, but the plastic keeps you from getting more that just a little stinging.
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