2008 1125r stalls at low revs

[RedDevilWheezy]

Hi all,

Just picked up a 2008 1125r w/ 7k miles yesterday and rode it for the first time today. Every time I de-accelerate the bike stalls, specifically when I stop at a light/sign. I noticed a "voltage" warning on the cluster one of the times. Bike starts back up immediately, so I'm not sure what's going on. I specifically purchased a 2008 to avoid the stator issue so I hope it's not that. Any ideas? Wondering if I just need a new battery since it looks like the original is still in there.

 

[Cosworth]

any cel's? press and hold mode and toggle then turn the key on to enter diagnostics. I had a similar issue awhile back ended up cleaning the iac. injectors and replacing both plugs before resolving the issue.

The iac has a cheesy little tube that is known to fall off

 

[RedDevilWheezy]

Thanks I'll check that out tomorrow. I did manage to get into the diagnostics mode but it was over 100 here today (Texas) and I was drenched in sweat so I didn't spend much time in there. Don't remember anything jumping out at me.

I ended up buying a new battery but it was bad (tested at 8v) so that's going back tomorrow. The battery that was in the bike tested at 12.8v, which should be fine right?

 

[mrlogix]

12.8 is good, but the duration of the charge under load test. Most automotive stores (national chains) have carbon pile testers and test batteries for free. Most load testers have the instructions on the cover plate. If it drops below 10.0V the ECM can have issues. Cleaning the throttleplates and the IAC is good to do on a annual basis. Gives you a chance to check The iac has a cheesy little tube that is known to fall off.

 

[heagachongoose]

Grounds and regulator are two good things to check.

 

[Cosworth]

Where in texas are you located?
Im in magnolia north of Houston.

 

[RedDevilWheezy]

I put the bike in DM and rode it, voltage stayed at 13v+ until it died suddenly. I don't have the tools, time or knowledge to keep messing with it so I dropped,it off at Harley, hopefully they can figure something out.

 

[RedDevilWheezy]

I'm in Austin

 

[RedDevilWheezy]

Got a call from the dealership today and they think it may be a bad fuel pump, curious how that could be the case when it runs fine other than when Slowing down or stopped. They are going to check the fuel pump tomorrow and et back to me.

 

[Mope]

a thorough IAC cleaning is where I'd start. Not to say that's it, but IAC and intake leak would be the first culprits.

 

[Cosworth]

Diag mode shows fuel pressure. They shouls be able to tell from that. And doesnt sound like they have, more just guessing.

I still say iac and plugs

 

[RedDevilWheezy]

Diag mode shows fuel pressure. They shouls be able to tell from that. And doesnt sound like they have, more just guessing.

I still say iac and plugs

I'll give them a call in the morning and ask them to check

 

[RedDevilWheezy]

a thorough IAC cleaning is where I'd start. Not to say that's it, but IAC and intake leak would be the first culprits.

Thanks mope, starting to think I should just go pick it up. I don't have a ton of confidence in the dealership at this point, the service writer thought I just needed to clean the carb lol. There are a ton of Buells around here but I'm guessing they don't get many 1125s.

 

[Mope]

Procrastinating so I did some searching......hadn't seen this one before so I'll be storing this issue in the knowledge vault to look at as an idle/stall cause. I tend to prefer troubleshooting issues myself; the hourly rates for service are too expensive for them to be chasing theories - I can do that on my own.

http://www.badweatherbikers.com/buell/messages/290431/772318.html?1446767063

Edit: Changing plugs isn't a bad place to start like Cos said. You can follow the plug cleaning procedure as a first try, but you do NOT need to rotate the engine to change the front plug if you go that route. It's tight, but doable with everything cleared from the intake.

 

[Cosworth]

When mine started doing something similar it went from dying every so often to absolutely un-rideable.

I ended up having to pull the fuel injectors and clean them along with a brand new set of spark plugs.


This is a link to my thread you can look through to see what all I did chasing my problem maybe it'll give you some ideas.
http://www.buellxb.com/forum/showthread.php?48098-1125-intermitent-shutoff

 

[RedDevilWheezy]

Thanks for the info guys!

 

[RedDevilWheezy]

Dealership took the bike apart today and the fuel pump is bad, they also noticed the belt was missing teeth and had a few cracks starting to show. Both seem early with only 7k on the bike.

 

[Cosworth]

About normal for the belt (on the 1125's) just depends how its been driven up to that 7k miles. Mine was missing teeth at 4500ish miles.

As for the fuel pump hopefully that actually is the issue. Let us know if it fixes your problem...

 

[RedDevilWheezy]

Will do, I should know by late next week when the parts arrive.

 

[RedDevilWheezy]

Getting the bike back tomorrow, I'll follow up here and confirm if it was the fuel pump or not. Hopefully it's good to go.