Out for a ride two days ago. 14+ miles into rugged Montana back country. Bike running great, but suddenly sputters and dies. Won't restart. I check the obvious: fuses, fuel line connection, fuel pump connection, battery connection. All fine. Try to start again, it catches, runs for a few seconds, and dies again. Try to restart again - nothing. After a less than enjoyable hike to the truck, I return the next day. Bike starts on the first try, but runs for about 10 seconds and dies. I restart, and it runs, but if I give it any throttle it immediately dies. I should note that the FI light flashes on when I start and then goes out as it should. No FI error flashes. Sounds electrical or fuel pump related, but cannot pin point. The bike has about 14 hours on it. Any ideas are greatly appreciated.
check the fuel cap valve i had the same problem i released the pressure that had built up in the tank and replaced the valve and no problems since
Thanks for your quick response. One of the first things I checked was the fuel tank for vapor lock and for enough fuel. I had covered the bottom of my fuel tank with heat resistant tape, so I haven't had any problems with fuel overheating.
Update. I took the bike to a dealer with a diagnostic computer. They "think" it is a bad crank position sensor. Anyone have any experience with these failing? Impact a cause? Water crossings? A freak event? Seems unusual for a bike with very few hours.
Joined Mar 2006
107 Posts | 2+
England
The easy thing to do is find a mate or dealer who has the same bike and swap fuel tanks, this will tell you if it is the fuel pump. The crank sensor fault code happens all the time as it logs a backfire as crank sensor fault, just get the dealer to clear fault codes.
Don't know if this will help but have you checked the air temp sensor? My 450 had less than 25hrs and had problems starting at both fuel stops (on both days) during the Finke Desert Race. Problem was air temp sensor coated with oil mist from crank case breather inside the air box. Wiped the sensor with a petrol rag after day 1. Started fine but problem repeated itself on day 2 at both fuel stops. Dealer says this is a common problem?!?! I'm blocking the hole in the airbox and rerouting the breather hose outside of the airbox.
Final Update. Problem solved. A hairline crack in the porcelain near the base of the spark plug. Not obvious at all. New spark plug, and it purrs like a kitten. The first thing I did was pull the spark plug, but I didn't notice the fine crack and, thinking back, I was probably looking at the bottom of the plug to see if it was running rich or lean. Live and learn I guess. One improvement that Husaberg could make imho, it to make the stock skid plate wider at the top and extend it higher to protect the vulnerable hoses coming out of the radiators and to prevent sticks and other protruders from getting between the radiator and the frame. I am not sure, but I think a stick may have been the culprit. I didn't think too much of it at the time, but when the bike first died, there was a stick wedged between the radiator and the frame. About the diameter of a pencil, too. It could have jabbed the spark plug with enough force to crack the porcelain. 1 in 1000 chance, otherwise, it must have been a faulty plug. Thanks to everyone for their input. Even us four strokers should carry a spare plug. :turn-l:
bergbigsky said:
yup.
I learned that one day when a sparkplug failed on my former Husky TE610. I also learned (on the same day) that cam bearings on the KTM 620 LC4 were a little sloppy. I had just bought the Husky and was trying to sell the KTM.
not a fun day...
relief
what a ***** something so simple eh!
to the gentleman who re routed the engine breather i smear the inside of my boot with grease and have from the start and sometimes have gotten it over the sensor but a quick wipe and no problems ....perhaps it needs wiping every time we change the air filter
but at least these bikes dont seem to be showing any major problems
what a ***** something so simple eh!
to the gentleman who re routed the engine breather i smear the inside of my boot with grease and have from the start and sometimes have gotten it over the sensor but a quick wipe and no problems ....perhaps it needs wiping every time we change the air filter
but at least these bikes dont seem to be showing any major problems
I have had one bad experience with a spark plug and that was years ago with a Nippondenso plug that came unsealed, and was blowing past the porcelain, thought the motor blew up.
Lesson learned eh? Change the plug as a matter of fact if there is a problem. I'm super glad that it was just as simple as that though.
As far as the air sensor goes, I have not had any problem with mine getting oily at all. Maybe that's happening due to too high an oil level? Everytime I have changed my air filter the air box is dry as a bone.
Lesson learned eh? Change the plug as a matter of fact if there is a problem. I'm super glad that it was just as simple as that though.
As far as the air sensor goes, I have not had any problem with mine getting oily at all. Maybe that's happening due to too high an oil level? Everytime I have changed my air filter the air box is dry as a bone.
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