Losing power and dying after 10 minutes

[j20brett]

Ok, stator checks out as does VR. Beginning to think its more furl related somehow. This is getting annoying.

[BAT]

Mine used to be just one cylinder that would cut out every now and then and it was a bad plug wire with a badly corroded end.

I can't figure my problem out either. I'm completely lost.

[BAT]

I'm going in circles here but I'm closer to the problem now. Its not ignition. I inspected the stator and pickup and all was well. I ran the bike and it was running poorer than ever. After it died, I remembered ether, which I had just used on another project. The bike fired with the ether, but wouldn't stay running, so I don't think its ignition.

I'm almost sure the fuel bowls are full, I know they at least keep gas in them. There is some wetness around the choke area on each carb. I think its carb related somehow, but in someway that each and every carb/cylinder is affected which confuses me.

[j20brett]

Well it seems we are both making progress. I tore mine down this weekend. Pulled the tank, inspected screens and they are both clean. Did find a 3/16" allen wrench in there though ! But on the the big picture. 2 of the 4 boots that clamp over the carbs were not seated properly. And the #1 cylinder's carb is the issue. Bowl is not filling as it should. Tested spark and its very good. With the bike running, and the bowl drain fully open, it barely dribbles, i mean barely dribbles gas out. Float stuck up?

[BAT]

I figured it out and its embarrassing. It was the fuel pump. It was hardly moving any fuel. I never bothered to fully check it because it was new, I heard it running, and the carbs had fuel, but not enough. This whole damn time it was the fuel pump. Simple shit.

Sounds like you found your problem, should be a simple fix.

[j20brett]

You have a link to the fuel pump you bought? And how did you figure out that it wasnt pumping enough fuel? I know mine pumps, just dont know if its enough. It will run for about 10 sec and shut off without ever fully building pressure it seems like. I remember it stopping when pressure had built up before.

[91fzr600r]

my bike has a stumble around 3500-400 rpm any thoughts

[adamd9932]

Bat, I am having some similar issues and think my fuel pump may be on it's way out. A list of some of your symptoms and a link to the new pump you bought would be greatly appreciated.

[j20brett]

I ended up with a used pump that was previously working, and it did nothing to help my situation. Carbs are next on the to do list.

[cad600]

my bike has a stumble around 3500-400 rpm any thoughts

The stumble at that RPM is a jetting issue. Are you running PODS? This could be a contributing factor as tuning with PODS is very difficult.

Bat, I am having some similar issues and think my fuel pump may be on it's way out. A list of some of your symptoms and a link to the new pump you bought would be greatly appreciated.

I ended up with a used pump that was previously working, and it did nothing to help my situation. Carbs are next on the to do list.

Try to sync the carbs before you open them up. I just went through the issue of starting strong but every time I started to slow down or come to a stop, the bike would cut out. This seems to happen on mine with extreme weather changes. I sync'ed mine and it runs like a champ again.

[91fzr600r]

yes i have pods.. but it has had this stumble before i instaled pods. after i put pods on, it actuley made it stumble less.. ive been told that i need to adjust my float level. i havent done it yet because it a PAIN IN THE ASS

[j20brett]

I would just like to update everyone and give the final verdict: I feel like a moron! Just for kicks i was messing with the bike the other day, and the last time i had it out i pulled the tank and fuel valve off, inspected it and all seemed well, no trash in tank ans the screens looked like new. Well, i switched the valve over to reserve and lo and behold, it runs! Not only does it run, but like a scalded dog! So the valve is somehow blocked on the inside,but i don't really care. It runs just fine on reserve and i fill up before the tank gets anywhere near reserve anyways. Thanks for all the suggestions along the way!