[listen2this1]

Just like the title I replaced the belts, shimmed to correct gaps on my 08' 848 and now I am having an issue while running at about 5k rpm. Went on a 1k mile trip and during the last 100 miles I noticed at about 5k rpm the power drops out to where it almost dies. If I give it a little more throttle it will clear up. The exhaust sounds a little different as well. I do own a VDST and I reset the tps after the belts.

The other odd thing is during a couple starts it hesitates, the clock and trip reset. Try again to start and everything starts like it should. The battery reads about 13.0 sitting and 14.3 running.

Also does anyone know where I can purchase the plugs/cable to add length to the ecu cable. Sure would be nice to have the vdst without removing the panel.

Beginning to wonder if I purchased a Lemon.
Thanks for any help.

 

[Shazaam!]

... at about 5k rpm the power drops out to where it almost dies.

Dirty air and/or fuel filter.

 

[Tuned]

On top of what Shazaam said, maybe the timing is off from the belt replacement due to the original belt being potentially loose and the marks you made for aligning the cam's, could have been off? Just a guess… but it for sure could be something like that.

 

[listen2this1]

the fuel filter is about 2,000 miles old. Don't think the air filter is bad enough to cause an issue like that. I've looked for vacuum leaks as well.

 

[Shazaam!]

Check for a split fuel line. It's not a vacuum leak.

 

[listen2this1]

The bike is at the dealer getting the tank replaced. Going to have the lines and connections checked.

 

[listen2this1]

Life happened and I was delayed on the repair. I now have the bike tore down to inspect the belts/timing. After looking at the position of the cams they are not off by a tooth. The belts seem a little loose compared to when I put them on. Planning on checking tension again.

I'm having a hard time wrapping my head around how a little slack in a belt would cause this issue.

 

[Tuned]

Maybe it's just a coincidence then? If everything you did checks out OK, then I'd dive right into the battery and voltage regulator next.

 

[ChrisE]

When you open your gas cap, do you get a massive rush of air in? Maybe a pinched fuel vent line...

 

[listen2this1]

It does not. The tank was replaced and it still does it.

 

[listen2this1]

The thing that confuses me is how It worked for 950 miles before the issue. I plan to tighten the belts and give it a shot in the next day or two.

 

[34566]

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[listen2this1]

The fuel filter and plugs have about 2k miles on them. I have checked the hoses and I am not able to see anything. I replaced the TPS about 4k miles back.

 

[Tuned]

Try the battery/voltage regulator business I talked about earlier. I don't believe it's a fueling issue at all.

 

[34566]

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[listen2this1]

12ish. It is tore down now. Will post results.

 

[37832]

This sure seems like an electrical problem... Low voltage would do this. Battery failing, loose cables, corrosion on grounds or connections...

 

[akunochi]

If your voltage is sitting at 12 with the bike running then I would suspect your voltage regulator. You can confirm this by doing a diode check with a multimeter. Also you can check your stator. On the stator measure voltage you should be reading about 27 vdc using any combination of the 3 wires at 2000 rpms

 

[listen2this1]

I finally got around to setting the belts to spec. With all the fairings off I took it for a spin. It still does it. The exhaust sounds a little popish as well. Almost a gurgling sound.

As for voltage it reads 14.4 at idle and while watching it while cranking it didn't drop below 12.

 

[listen2this1]

After doing some reading I am wondering if I should go ahead and replace the coils. The seal on the front one appears to let water pass or at least I think it is caused by water.