Battery problems?

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nick790

Joined
Sep 26, 2010
Messages
163
Location
Kent, UK.
I failed to Finnish a race today due to a flat battery :cry:
Started fine this morning and stalled a few times but it always fired up.
Then 40 minutes from the end stopped the bike to take a drink, hit the buttern nothing!
Let the bike cool off, still nothing. Checked terminals.
Put it on charge when I got back, battery very low so I'll see if it takes a charge.
Could I have a charging problem?

The bike a 2010' FE570

Of course I was at the lowest part of the track and my van was parked at the top of a hill :roll: race was all over by the time I got back. :evil:
 
First thing to check is that the terminals are clean and tight.

If you can get an amp clamp, run the engine and see what the stator is charging - put it on the battery lead when the battery is discharged. If the battery is charged up you'll see very little current going in, so don't assume a bad stator just because it's not charging much.
 
I had this problem again yesterday, thankfully this time I wasn't racing so I limpt the bike bake to my van. The problem only occurs when it gets hot. Got to my van and put a meter on the battery. I hade over 12v and when I hit the button it only dropped by 2 volts, so the battery was fine. Then checked it through the starter solenoid all good but still not turning the engine over. Then I put the probe on to the starter terminal, hit the button again. It tried to turn over, so I gave it a good wiggle. Starter acted normal! Took the terminal apart, it all looked grey and dry so I gave it a good clean up and got some contact cleaner on it and put it back together.
I then went back out on the track to get it hot again, it's now fine will stop and start over and over again. Even in gear, never did that before!

So heads up if you have a similar hot start problem.
 
nick790 said:
I had this problem again yesterday, thankfully this time I wasn't racing so I limpt the bike bake to my van. The problem only occurs when it gets hot. Got to my van and put a meter on the battery. I hade over 12v and when I hit the button it only dropped by 2 volts, so the battery was fine. Then checked it through the starter solenoid all good but still not turning the engine over. Then I put the probe on to the starter terminal, hit the button again. It tried to turn over, so I gave it a good wiggle. Starter acted normal! Took the terminal apart, it all looked grey and dry so I gave it a good clean up and got some contact cleaner on it and put it back together.
I then went back out on the track to get it hot again, it's now fine will stop and start over and over again. Even in gear, never did that before!

So heads up if you have a similar hot start problem.
Click to expand...

Or maybe not!

Failed to restart after a refuel Sunday. Just befor my last lap cost me 3rd or maybe 2nd place Finnish. Gutted.
Battery fine, over 13v. Bike cools down and starts fine. I'll go throw all the terminals again. Anyone know where the eath is connected? Might put some heat protection on the starter.
Any idears??
 
Crazy.....

Can you try to start your bike with some other battery?

Maybe contact of starter reley are breaking circuit? Can you measure voltage on starter terminals directly while you keep the start button pressed, not on battery, than directly on starter terminals.

Regards
 
The problem is it only happens when the bike is at full race temp' under race conditions. Checked the battery voltage when I got home, over 13v. Can't see how it would have gained charge. So I'm guessing something is gaining a resistance with the heat sinc. Just got to go threw it all and try again I guess.
 
So I still have a problem! :(

I've had all the connections apart and cleaned them, starts fine when cold.
Anyone know where I can get a wirering diagram, or know how to check the stator?
Is it possible the auto decompress isn't working when it's hot?
This is doing my head in!!!!!!! :evil:
 
It is mechanical. You will spend forever looking at electrical. Been there, done that as they say. Starter torque limiter.
viewtopic.php?f=5&t=13414&p=112779&hilit=torque+limiter#p112779

I went thru four batteries in the first 600 miles off my bike. Only when hot and I could never hear the starter freewheeling like in the video. Mine was set at less than 10ft. lbs. It's starting to do it again. I might need to tighten it up and add some locktite. You can still bump start it if you stop near a hill. Half mile push to a hill once ended up being better than the push to the truck :D
 
Can I ask what your symptoms were, and if it would start if you put jump leads on it?
 
Never tried jumping it. Sounds like the same symptons. Always hot and a few hours out for sure. When cold it would start real easy. Hit the starter and it wouldn't make a sound. I checked the battery voltage when I hit the starter and even checked the voltage at the starter. It seems like the voltage was in the nines at the starter. Checked parasitic loss. Never could find anything that I could really put my finger on as the reason. With the low voltage at the starter I kept thinking it was electrical. Even changed out the relay. 4,000+ miles after tightenoing the torque limiter it still starts when hot.
 
Ok, it looks an easy enough job to do, even if just to rule it out.
What gaskets do I need? How long start to finnish do you think?
 
I've had a very similar problem and so has Husaferg. his was that the battery had broken inside.

mine is still on going but we have narrowed it down to the solenoid. I found it to be a fuse that can wobble loose. what you take as 'pushing the battery terminals' maybe you just flicking the fuse back in 'just right'.

regards

Taffy
 
I try the wiggle test on every part I could get to on Sunday, the only thing that would get it going is a jump from another bike. In the past if I let it cool down for half hour it woul fire straight up repeatedly.
It may be that the battery is bad, and it's a simple as that, but it all seams to inconsistent for a battery fault.
 
Hi mine is doing exactly the same thing. FE570. Out on a ride this morning with friends. Rode about 50km and stopped for a short break. Starter would not turn over. Symptom like flat battery. Managed to push start it down a hill.

Came home and left it for a few hours. Starts first time.
Maybe the battery dies with the heat.
Let me know if you find anything
 
there is a double fuse at the solenoid. I had one of those lose (the other is a spare anyway!)

when really wet I have that flat-battery-for-a-moment feel

Taffy
 
I rode at Bagshot today, it was blooding wet and the going was a bit snotty, espeicly with newbies stopping on hill climbs and at the first sign of mud. So it got proper hot, and the fan was cutting in a fair amount.

Worth saying here that it now has a brand new gel battery, I got it to be sure that it wasnt that.

But it's not, Same broblem, not as bad as it only fails to start once, luckily I was a the top of a massive hill, so I bumpt it.

I'm going to try the relay next, I'll have out, and bench test it. I'll put it threw every condition I can, and give it all a good clean up.

I don't worry about it to much now though, not now I've made a mini set of jump leads stowed under my seat :wink:
 

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