Bike won't start. :'( - Honda Motorcycles - FireBlades.org
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post #1 of 14 Old 08-26-2005, 7:04 PM Thread Starter
 
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Bike won't start. :'(

I've been at it for a while now... It's been a long haul and it still won't start. I have spark, the fuel pump turns on (and I have no kinked hoses) and the air filter is cleaned.
All connections have been double checked.


Story from the beginning (shortened):
(because the first thing will be to see what I've ruled out and what's the history)

About a month ago my bike died on me riding into work. As I was accelerating onto the highway. I pushed it home (uphill w/ a full tank). I took the tank off and checked all the fuel connections (since I know that a pinched breather hose will kill the engine). It was all good and I put back the tank. The bike fired up.
I sent it off to the dealership for a check-up just in case. Valve check, new plugs and see why it died. They found that the idiots from another shop put in the wrong plugs and didn't snap the plug caps down tight. I needed 2 more plug caps as they had worn and won't reliably contact the plug (the top of the plugs were burnt).

I picked up the bike and the next day it died on me coming home from work. I put the kickstand down and it fired back up. Ok, maybe the kickstand wasn't all the way up.

That saturday as I was trying to get into work: the bike died on the highway as I was accelerating up to speed.
The shop picked it up and played around with it for a day. They couldn't find anything wrong so they disconnected the PCIII.

I put on 500km trouble free.

Monday rolled around and it wouldn't start after I had ridden it hard on Sunday.
I pull the tank off, check everything I can, and put it back together. It fires up.
Odd.

I put on ~1000 trouble free kms.

Last weekend: same deal. I wanted to take a ride down to the KTM dealer to check out the 625SM and it wouldn't start.

Take the bike apart.
The #2 plug cap pulls off with a light touch. I order a new one, clean the air filter, check all the plugs and put it back together after checking that I have spark. All good.

Put fuel in the tank, turn it on and it'll just crank over. The fuel pump turns on, there are no error codes (even after I jumped the switch) and all the fuses are OK.


Help???!?!?!

---

-Rob.
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post #2 of 14 Old 08-26-2005, 7:11 PM
 
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Re: Bike won't start. :'(

Loose ground? Weak battery?
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post #3 of 14 Old 08-26-2005, 7:33 PM Thread Starter
 
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Re: Bike won't start. :'(

If it was a loose ground I shouldn't get spark. I think.

The battery is sitting on the charger right now; just to rule it out. Last I checked it was sitting at 12.7V and the charging system was 14.4V (when the bike was actually running).

---

-Rob.
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post #4 of 14 Old 08-29-2005, 12:43 PM
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Re: Bike won't start. :'(

Is the PC back in? If so. have you tried disconnecting it?
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post #5 of 14 Old 08-29-2005, 6:47 PM
 
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Re: Bike won't start. :'(

Anything wrong with the tilt sensor? (just thinking it that you seem to be referring to acceleration as a cause so if its loose could be swinging past the cut off.)

(sage like wisdom from the man that put the tilt sensor back on unside down and pulled his hair out for 3 hours on sunday when it was the best riding day in 3 months)
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post #6 of 14 Old 08-29-2005, 7:11 PM
 
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Re: Bike won't start. :'(

Sounds like a short. I know this sounds crazy but get on it and bounce some, see if this moves the wire. Maybe even roll up to a wall and compress the forks while touching the wall. Seems from your story that motion changes things (removing the tank is motion). If this works I would check all the wires under the tank area. Good luck.

Must obey the sheep dog
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post #7 of 14 Old 08-29-2005, 7:34 PM Thread Starter
 
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Re: Bike won't start. :'(

Matt: tilt sensor will disable the fuel pump. You won't hear it prime itself (I tested this; I took it off and flipped it to see what would happen).

Sheep: You have no idea how much I've done things like that. I checked every exposed wire I could. I think you're right that it's a short. But where? ARGH! The only wiring I've done are the signals - I know from experience, when they're done wrong or short themselves, they'll just pop a fuse. I've disconnected the heated grips, alarm, PCIII and the screw-down charger leads.

Jake: Yeah, the PCIII is out. It's sitting on a shelf. I talked with Dynojet and they said they would inspect the unit for the bike's engine dropping dead as I accelerate up to speed on the highway. This almost seems like a different issue.

Thanks for the ideas guys... I've passed the bike onto the local Honda shop, again, to see if they turn up anything. (as well as started shopping for a DRZ400SM)

---

-Rob.
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post #8 of 14 Old 08-29-2005, 11:24 PM
 
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Re: Bike won't start. :'(

Quote:
Originally Posted by SpikedLemon
You won't hear it prime itself
Yer I know.....sweetest sound in the world when it works again.
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post #9 of 14 Old 04-20-2006, 11:32 PM
 
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Re: Bike won't start. :'(

I am having the exact same problems/symptoms with my Rc.. Still no luck so far.
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post #10 of 14 Old 04-21-2006, 1:02 AM
 
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Re: Bike won't start. :'(

Good luck with the shop.
I would disconnect the bank angle sensor and jump it. If the bike does fine then you have located the issue.

You could also have a loose connection on the ground or even in one of the main power-supplies to the fuse box. There's no easy way to find it. All you can really do is dissassemble and check everything one peice at a time.
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post #11 of 14 Old 04-21-2006, 7:59 AM
 
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Re: Bike won't start. :'(

Fuel pump? Or the electrical connections leading to it?

With all the problems seeming to come from acceleration and the fixes all happening when the tank is removed (or otherwise moved to access other parts), I would look here next.
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post #12 of 14 Old 04-21-2006, 10:49 AM
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Re: Bike won't start. :'(

Could be a clogged fuel filter not allowing enough fuel to the motor under heavy acceleration, higher speeds.
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post #13 of 14 Old 04-21-2006, 4:18 PM
 
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Re: Bike won't start. :'(

I had the same EXACT symptoms in one of my drag race cars. Fuel pump relay. Hard wired it to a switch and it never happened again.
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post #14 of 14 Old 04-23-2006, 12:01 PM
 
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Re: Bike won't start. :'(

i would think fuel pump or pump eletrics or the tilt sensor
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