Fuel Pump problem or something else??

aaronc70 · May 28th, 2011, 07:18 PM

I've got 8.5 hours on my '10 570, the last two rides I've been on the bike's fuel shut off and dies mid after 20-30 miuntes. The first time it restarted in about 30 minutes. Today I tried for an hour and it wouldn't restart, eventually the battery ran down. After a buddy towed me out at our club's annual tag team Harescramble ride (embarrassing with an expensive new bike), got home today and jumped it off a few hours later and it started. Could this be anything other than the fuel pump?

I really want to like this bike but so far I've had boiling fuel (removed the check valve in the vent line), white gunk in the tank causing fuel starvation (flushed filter and tank with alcohol), horrible stalling/flame out problem (remapped the FCU and got a rekluse). I also sprung for the radiator fan to avoid heating problems.

As much as I've read about this bike I was really looking forward to it and it's the first bike I've ever bought new. I have yet to have a good day out on it though. Anyways, if this could be anything other than the fuel pump, please let me know. I've checked the plug gap and no wires are affected by the shock spring rubbing. I want to love this bike but it's getting tough!

johny · May 29th, 2011, 01:51 AM

This sounds very similar to what i was having on my 09 450, my orange fault light went out and it would crank but not start, then i'd leave it and it would run then just stop, and after going through everything, it was a loose wire which connected to 3 others in the loom near the shock, which had no signs of rubbing!!! either
hope this helps, keep us informed

aaronc70 · May 29th, 2011, 04:20 AM

OK, that's worth double checking for sure. Any ideal what the wire did exactly, or what color or size it was? That might help narrow the search.

johny · May 29th, 2011, 05:24 AM

The wire in question, was i think red and white, that I'm not to sure about, but what i am sure about is, where the wire came from, it came from around the coil area a resister and went back to near the shock deep inside the loom where it joined 2 or 3 other wires going else where in the loom, it can seem daunting pulling the loom out and undoing it but it only took an hour or so for my friend, and my berg has been nothing but perfect since

DaleEO · May 29th, 2011, 09:24 AM

Check this thread:

viewtopic.php?f=7&t=13490&p=121926#p121926

aaronc70 · May 31st, 2011, 08:38 AM

Thansk DaleO. I had read that thread and several other similar ones. I'll check for the wire to rule that out, then go with the aftermarket fuel pump that's available. I may hit up the dealer to see if there's any waranty options on that as well.

aaronc70 · June 7th, 2011, 05:17 AM

I checked the wires near the shock and there was nothing rubbing. I replaced the fuel pump with the CA Cycleworks one and so far has done the trick, see this thread for more details: viewtopic.php?f=7&t=14479&start=60

I won't know for sure until I take it on a good long hot trail ride, hopefully I have finally figured this bike out.

aaronc70 · June 26th, 2011, 09:49 AM

Well, I fixed the problem after replacing the fuel pump. See the linked thread above for the full skinny. -I've ridden the bike the last two weekends with no problems. I also took it on one really tough ride for 45 minutes on super tight, slow singletrack that is really only suitable for a 2-stroke- the 570 did great. I'm 95% sure I had a bad fuel pump, possibly due to being clogged up by white goo from the fuel tank, as everything got better once I replaced it. I used the CA Cycleworks pump. See you on the trails!

rezrider · January 17th, 2012, 11:34 AM

I can only hope that's what my problem is.....I too was out on an extended ride in a wash (tight area in Ocotillo Wells) doing a lot of 1-2nd gear stuff wen I gotto an open section and aired it out...came to a stop with the rest fo the group and it flamed out. Took a few tries to start but it did...all ok for a couple miles then BWaaaaaaaaaa....ka ka ka ka dead...tried for a while butno start. Thought maybe since the front tank sounded realy low we put some fuel in it even though the rear tank was 1/2 full....still nothing. I too experienced the "pull of shame" back to the trucks".

I hope it's not the boiling gas issue as I've heard besides your post...tough to redesign that part.

DaleEO · January 17th, 2012, 12:24 PM

Originally Posted by rezrider

I can only hope that's what my problem is.....I too was out on an extended ride in a wash (tight area in Ocotillo Wells) doing a lot of 1-2nd gear stuff wen I gotto an open section and aired it out...came to a stop with the rest fo the group and it flamed out. Took a few tries to start but it did...all ok for a couple miles then BWaaaaaaaaaa....ka ka ka ka dead...tried for a while butno start. Thought maybe since the front tank sounded realy low we put some fuel in it even though the rear tank was 1/2 full....still nothing. I too experienced the "pull of shame" back to the trucks".

I hope it's not the boiling gas issue as I've heard besides your post...tough to redesign that part.

sorry to hear of your woes................

Please post your signature with year and model of your bike, that will help us help you.

Dale

any problems with the 2012 350 husaberg