hawk shuts off all of a sudden

[Teddy]

hey guys, i have a 2006 600 H.O, and every ride i go on it always just shuts off on me. you can hear the sled start to starve and struggle then shut off. and a few times when i jam the throttle wide open in a fast motion it did it too. anyway tonight i started taking off all the plastics to have a looksy. can anyone tell me what this could be? i checked the main fuel line where it comes out of the tank already.

 

[TKswild1]

Well alway's start with the main three FUEL-AIR-SPARK if 1 of those is out the engine wont run right... If it sound's like it's starving, check the carbs, I would take em off and clean it good.. Jet's for sure. Does it only do it once a ride or all the time... Possible vapor lock, take off your gas cap and blow through the breather. Give some more specific's like does it stall at idle or only when riding. Good luck I'm sure other's will chime in here as well.

 

[J&L Snowhawk]

gas line pinched

Sounds alot like pinched gas line. I have repositioned the gas line on my ride to avoid this problem, comes out of tank by choke lever. works great. could be fuel filter also

 

[Beeline]

Most likely the mpem module . Sometimes mine does this as well .Do a search on the old forum . From what I gather ,you can help this by going up 1 jet size on your idle jets .

 

[Jeff C]

Sounds to me like it might be the deadman switch on the throttle lever.

Not sure how the Hawk is wired through out the throttle lever, but normally there is a cutoff switch on the throttle lever so it will die if you fall off and the handlebars get smashed and pins the throttle WFO.

Try to duplicate the problem by holding the throttle lever from moving at where it pivots. Hold that side from moving forward, and pull on the throttle lever.


You might have a intermittent short in the wiring for the deadman switch, or the switch may be going bad.

Years ago, I had a sled that did much as you describe, and it ended up being that little switch in the throttle lever block......

 

[sledr2]

I have had water in my fuel a couple times. Stopped and drained the float bowls. Now I try to keep Isopropyl in the tank more often.

 

[BlazinBya]

TWIST throttles-

Sounds to me like it might be the deadman switch on the throttle lever.

Not sure how the Hawk is wired through out the throttle lever, but normally there is a cutoff switch on the throttle lever so it will die if you fall off and the handlebars get smashed and pins the throttle WFO.

Try to duplicate the problem by holding the throttle lever from moving at where it pivots. Hold that side from moving forward, and pull on the throttle lever.


You might have a intermittent short in the wiring for the deadman switch, or the switch may be going bad.

Years ago, I had a sled that did much as you describe, and it ended up being that little switch in the throttle lever block......

All your researching and you didn't realize that hawks have twist throttles and not a throttle block/lever assy?

 

[Jeff C]

All your researching and you didn't realize that hawks have twist throttles and not a throttle block/lever assy?

Whoops!!

I forgot about all of that..........

Well that throws out my idea!!

NEXT!!!

 

[buffaloHAWK]

did you check...

did you check the runnin boards? oh yeah i aint got them either....thats the reason i bought a hawk, it has foot pegs and a Twist throttle!!!!!!!!!!! sounds like a carb issue...my 503 did the same thing beginning of the season. cleaned the crud out of the carbs and it runs awesome!!!!

 

[TKswild1]

Awsome Jason

Here I'm thinking Jeff has a good point. Jason alway's on his game. We newby's are just tryin to fit in. New feather's ya know. Tough to fly fast out of the nest.

 

[Teddy]

thanks for all the input guys, im gonna check everything tonight and hope for the best.

 

[buffaloHAWK]

so ....what was the trouble?

 

[snowhawk jockey]

I am with Beeline on this one. MPEM

It runs great then stutters, then just shuts down? After sitting for a while the machine starts right up and runs normally, right? Heat related MPEM failure will be the cause. All the usual culprits of fuel line and tank venting are easy to check for. The MPEM is a pain to diagnose. Usually, it takes some underhood heat(riding time) to initiate the failure, therefore the false sense of "must be a bad tank vent". When it fails next time, pull a plug and you may or may not still have spark, convincing you that it isn't the MPEM. You will find that, by switching with a known good MPEM, your problem will mysteriously vanish... and reappear in the machine you swapped MPEMs with.

 

[Teddy]

super excited for tomorrow!!!

yeah so me and a friend got busy at the hawk tonight, im also pretty sure its the MPEM for the shut off problem as everything else seems fine. we also put a new TRA 3 clutch off a summit 600 on and i swapped the crazy stiff springs on the 2 rear shocks for some much lighter springs i took from an 08 REV XP. whitch fit perfectly i might add. anyway im gonna take it out for a good long ride tomorrow and im sure the ride will soften up alot thank god. i might get to use all of my suspension travel for once.. check back tomorrow for the verdict.

 

[J&L Snowhawk]

Soooo was it the mpem

You don't have to change the springs or the skid just remove the front coil spring. because it is a falling rate suspension it gets softer through out the stroke. works much better

 

[Hawkdoggen]

Hey Teddy , if that doesnt fix it you might try the fuel pump . We had two go bad a week a part . Youd be ridin workin it then it would starve out and quit , set fror 5 - 10 mins then run great again for 5 to 20 mins , drove us crazy but it turned out to be the pump it just wouldnt totally die on either machine . And the bummer is mikuni doesnt (or at least last season) didnt make a rebuild kit for that pump so it s around 75.00 from a dealer