Baggy cuts out at WOT

[CasterTroy]

OK so I was meeting up with my sportbike buddies Saturday to do some tight corner twisties up in the mountains.

I wanted to take the baggy and pass them mid-corner.

So I jump on the highway for a 20 mile jaunt to meet up with them.....and about 10 miles into the ride (146km on this tank of gas) I'm at WOT (wide open throttle) or maybe just a hair under doing 85 on the hiway when she starts sputtering and spitting like I just shot a load in her mouth?!?!?!

I though MAYBE I was running out of fuel...so I switched over to reserve.....no change?!?! Spit, sputter, and now getting violent, losing power?!? had to pull to the side. It would RUN....but rough as hell. I limped along the roadside for 3 miles to a gas station.....under any kind of load or heavy throttle it would buck like a bull with its sac tied up tight in a knot....FINALLY got to the gas station...filled up and fired up just beautifully.

Rode like a champ for 5 miles.....then started acting up again. This time I immediately got out of the throttle and babied it. It ran fine when babied. SO I turned around, went home and got the R1 for the days ride.

AT the end of the day I came home perplexed. I drained the bowls and got a LITTLE crud out…but no water….nothing telling. I pulled the fuel filter and blew thru it…..Very hard to blow thru….I mean I’d put a lot of pressure in and wasn’t getting much air out the other end.

I pulled the pet cock and tank filter….it was pretty cruddy but nothing awful.

I sprayed carb cleaner all over the pet cock and thru the 1/4” hoses, then went to the parts store and got a 1/4” fuel filter for a lawnmower with next to ZERO resistance thru it. Reassembled everything and rode the piss out of it for 40 miles on the hiway with no issues.

My only thought is that the fuel filter just finally clogged up…..clear filter that looks kind of like a “top” and it has some cork looking material in the middle.

I need to buy a new one and see if the resistance is the same…..because surely I wasn’t able to flow the required GPM thru that filter that those carbs needed.

[irishnutjars]

Sometimes the vacuum in the tank does funny things like that to mine- I know there shouldn't be one (vacuum) but if you open the tank cap & theres a 'psst' of any sort it could be that.

good luck!