Rode my bike to work, started fine and ran fine. Took it out at lunch to run a few errands, same, started right up, ran fine.

Got off work, started her up as usual, and noticed that when I gave it some gas it would would cut out at around 3k. After I let off the throttle, it would idle fine. After about a minute, it the idle slowed and it eventually died. Went back in the morning, it fired right up. Went for a ride with a group of friends (100 miles), ran great the whole time, started everytime without a hitch.

Got home waited a few hours and tried to start her, same thing. Ran for a minute and then started to slowly die. Just fired her up a few minutes ago and she fired up and ran perfect.

I did notice that when I gave it throttle, the lights dimmed when it cut out.

Any ideas on whats going on?

My friend is knows quite a bit about bikes, and thought I was leaving the choke on too long, but last night I fired it up without the choke and same result.

Was going to try running some sea foam through it before I start ripping into her.

 

I would guess electrical issue... fried R/R (regulator rectifier). you can test it easily with a multimeter.

 

I thought about that, but why would it only happen at night? It seemss to be temperature related (colder at night).

Battery has plenty of juice.

 

vacum fuel petcock is acting up would be my guess.

 

Leaving the choke on would have nothing to do with that.

Only at night? Are you sure? From your writing it sounds like the issue just happened at night, and you haven't tried it since then. Make sure it truly is a night issue first, and then describe what your nights are like where you are. If they are Alaskan nights they'll be different than Florida nights

 

This has happened three nights in a row. As for temp, I am a little over an hour South if you in Corvallis so basically the same weather as you, sub 40s the last few nights and mid 50s during the day

I added some Sea Foam this afternoon and took her for a spin. Fired her up a few minutes ago and she ran fine. I'll see what happens tomorrow.

To be continued...

 

OHHH. that happened to me today. I shook the bike side to side cuz i was at work and needed to get home. It worked fine after a minute lol. This was during the day at 60 degrees. I think it does have to do with the fuel petcock because i just had the wires to the RR changed. cuz they were getting cooked from overheating.

 

If it's only at night, could it be an electrical problem, or do you ride with lights on in daylight too ? Air temp should only affect it at really cold (sub freezing) temps, unless the choke is stuck.............

Reading the rest of your symptoms - check your reg/Rec. I think it's dying.................................

 

Lights are on during the day. If I have problems tomorrow, I'll check th r/r.

Thanks!!

 

Check the fuel petcock, too. It's a simple enough test. Do it while you have the tail fairing off and you're checking the R/R.