09 700 Grizzly engine stalling while in water only when the diff lock is activated

[chickenhawk]

09 700 Grizzly engine stalling while in water only when the diff lock is activated.
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I can be in the middle of a hole and the bike is running great, then hit the locker and the engine seems to go into a studded/stall (almost like a rev limiter), as soon as I turn the locker off the bike runs fine.
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What gives, is this some Yamaha protection deal or what?<o:p></o:p>
Thanks for yall's input!
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PS, I search and was unable to find info on this in past post.<o:p></o:p>
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[DizGrizz]

I am unaware of any "limit the revs if engage diff lock under water" feature. However, there is a recent thread about someone who was having the same sort of issue when he tried to disengage his lock (which was failing to register because of a bad sensor/switch in the diff lock motor). At, the time, my guess was that Yami did put some sort of rev-limit that gets activated when the lock is being engaged or disengaged but the sensor doesn't show it as having done so yet (keeps you from trying to lock/unlock under heavy power).
I would pull your diff lock motor out and see if it has gotten water in it. If so, you may also have water in your differential so check it before you go riding again!!!!

EDIT: Here's that thread...pretty informative. 07 Grizzly 450 diff lock light. Good luck and let us know what you find.

[AZ08Grizz]

Diff lock should only be engaged/disengaged when tires are turning slowly (3 mph or less) or you risk damage. When you are in a mud hole make sure you only engage diff lock with low load on the tires.

[DizGrizz]

Just noticed that was your first post, chickenhawk...So, welcome to GC!
Good advice there from AZ08Grizz.

[warj1990]

This happens on my 07 also.

When you hit the diff lock button and mash the throttle - it will stutter until it actually locks in the front end.

So even though you hit the button - it did not actually lock the front end in. It will stay in the "limp" mode and sputter until the front end locks in.

The gears need a little play to lock in correctly.

Next time try diff. lock before swamping it, or lock it in and rev a little, to turn the tires, then back off a cupple of times.

When the pod. shows you in diff. lock - you are free to do as you want then.

There is also a rev. limit to diff. lock - I think around 35 - 40 mph. So when the pod. shows you in 4wd diff. lock press the override button and all should be good.

I notice I need the override button once in a while to get enough speed to throw the mud out of the tires so they can dig and go.

[chickenhawk]

Wow Thanks for all the great replies and info!

Yeah, it only happens when say i am in 4x4 moving thur a hole and hit the locker button as I am still giving it power. It does not studder when allready locked prior to hiting a hole.

The times I have noticed it most is while I have the front lofted in a water wheelie and hit the lockers just to see what will happen. It will allways studder at that point.

Thanks again for the quick replies!

[GRIZZLY77]

Same problem here!
Locked it before getting into the water. With a light on showing that is on diff lock went thru and at the end when I need it, same thing red light start blinking, engine starts stalling at the exit from the pit, and I can't rev it up, every time I tried to hit throttle it's start stalling. Btw all this happen when my butt was still in the water and the front wheels up high- very frustrating.
Didn't try to hit override button, thou.

[outdoorspassion]

what year is your grizzly. ?

[outdoorspassion]

i have a 08 700 and having good luck with it so far. the only thing that bug's me is a couple noise's dont think it is a big deal, nothing else is going wrong and done it sense new. but little noise come from the clutch cover area. and the other is up front what seam's to be by the exuast maybe a spring vibration? hard to pick it apart when riding it. does it around 35 if you go over or under it go's away but never get's any worse the buggy only has little over 300 mile's on it now . i also have a set of 28 inch itp's with 108css rim's to go on it but wont a few more mile 's on it first. should i put a clutch kit it it? i wish i would have not got that big of a tire. i do have them on-line for sale. cheap if they sell i might get alittle smaller tire i dont know, any tip's hint's help please throw them my way, thank's

[outdoorspassion]

when diff lock is activated it does have a rev limit alot lower then if it were in drive. also happen's in reverse. their is a overdrive botton on the handle bar if needed you need alittle more rpm to get you out of a spot or back up alot faster just push it. work's great. just remember if the diff lock is in gauged keep the wheel's as straight as you can. and i have had no trouble with mine acting up in the water or snow ????? must be dealer issue, the only thing i got done on mine that was not giving me trouble but had it done before it did was the gas vent part was replaced. have a great day all/

[NCMUDMAN]

This is a common thing. It happens on my 450 as well as the 700. Once you figure things out, it isn't a big deal.

[GRIZZLY77]

Originally Posted by NCMUDMAN

This is a common thing. It happens on my 450 as well as the 700. Once you figure things out, it isn't a big deal.

What do You mean? Figure what?

[NCMUDMAN]

Originally Posted by GRIZZLY77

What do You mean? Figure what?

Depends.
Sometimes if you are stopped and you engage the diff lock, it does right in. other times if you are moving, it may take hitting the brake, or turning the handlebars to get it locked in.

[jake72]

to be shure diff lock is fully engaged, back up a little bit, thats what I have to do works every time

[edclll]

I am having the same problem when I get in the mud or water and try yo engage the diff. lock the red light blinks and engine stalls even when ya push the over ride. when I get out of water the diff. lock works till about 20mph and then stalls I push the over ride and it doesn't stop the stalling and the speedometer goes to 00 and blinks till i slow down. i have pulled the diff. lock selecter off all good no water there sure could use some help.
Edwin

[warj1990]

The red light for diff. lock should be solid, I think the blinking means it is not enguaged yet.

On my 700 when I press the over ride button and mash it, with diff. lock it turns the speed guage into dancing lights in a circle pattern of "00" It does however bypass the rev. limit on mine.

[chickenhawk]

Eddie, I have not got it worked out yet... I will let you know if I do.

[edclll]

Hi chickenhawk I have tried a few things like pulling all the relays out and applying elc. grease to the plug ins even pulled the 4x4 servo plug in and the servo off pulled the motor apart no signs of water reinstalled everything the 4x4 and diff. lock or engaging and disengaging fine. Took a ride and the bikes seems to be ok except when i go over 20 in low range with diff.lock on when the rev limiter kicks in I pushed the override and bike still stalling. the local dealer says they will call yamaha and see if they can come up with something because they haven't had a bike come in with this problem. I will let ya know what they say. Eddie