[Floyd grizzly]

Gentlemen, I have such a weird problem , I have a 1998 600 Grizzly . It runs fine until I put it in Reverse then it misfires constantly. It is almost in possible to back up . Does any one have a solution for this or can lead me in the right direction to fix this. It runs ok in neutral and in forward Lo and Hi

 

[Ridgway81432]

Have you thought about a reverse limiter switch?

 

[Floyd grizzly]

Have you thought about a reverse limiter switch?

Tell me more about this please

 

[Ridgway81432]

I'm trying to find a picture or schematic online for your ride which is completely different than mine, I'll get back to you when I find what I want.

 

[Floyd grizzly]

I'm trying to find a picture or schematic online for your ride which is completely different than mine, I'll get back to you when I find what I want.

Thank you so much

 

[Floyd grizzly]

Thank you so much

You helped me before with the timing chain which I changed out and got running good again.

 

[Ridgway81432]

I haven't had my hands on a bike like your's, I was looking for a clear picture to see if there is an over-ride button on your's, like my 660 has. We have different set-ups so mine looks like this; (second picture)

Yamaha 5KM-83972-00-00 - SWITCH, HANDLE 4 | Partzilla.com

Buy Yamaha 5KM-83972-00-00 - SWITCH, HANDLE 4. This OEM part is guaranteed by Yamaha's limited part warranty ✓ FREE Shipping on qualified orders - Partzilla.com

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by the left side grip. Mine has diff lock and when this position is selected the speed is limited to 20 m.p.h. by de-tuning the engine, and when in reverse this same de-tuning happens above @10 m.p.h., never really looked to see the speed when it kicks in.
Your problem description sounds exactly like what mine does (sounds like) when the limiter kicks in, but I can't find good info on your bike to know this is right way to go.

 

[Floyd grizzly]

I haven't had my hands on a bike like your's, I was looking for a clear picture to see if there is an over-ride button on your's, like my 660 has. We have different set-ups so mine looks like this; (second picture)

Yamaha 5KM-83972-00-00 - SWITCH, HANDLE 4 | Partzilla.com

Buy Yamaha 5KM-83972-00-00 - SWITCH, HANDLE 4. This OEM part is guaranteed by Yamaha's limited part warranty ✓ FREE Shipping on qualified orders - Partzilla.com

www.partzilla.com

by the left side grip. Mine has diff lock and when this position is selected the speed is limited to 20 m.p.h. by de-tuning the engine, and when in reverse this same de-tuning happens above @10 m.p.h., never really looked to see the speed when it kicks in.
Your problem description sounds exactly like what mine does (sounds like) when the limiter kicks in, but I can't find good info on your bike to know this is right way to go.

I do not have any thing like what you showed me or anything that would similar to this. I will keep looking

 

[dezz]

The 600 does not have a reverse override. That feature never came until 2004 or 2005 on the Grizzly 660.

The reverse limiter is inside the CDI on the 600. I am not sure where it gets its signal from though. It is activated by both speed and engine rpm if I remember correctly. I know speed is limited as I used to hit it all the time on my 98' 600 when I was plowing snow (backing in my driveway).

 

[Ridgway81432]

I didn't think to check the several different years of 660 production to find when the over-ride button showed up.
Getting back to the original problem.....does this happen at idle? or with throttle input to move the bike?

 

[Floyd grizzly]

I didn't think to check the several different years of 660 production to find when the over-ride button showed up.
Getting back to the original problem.....does this happen at idle? or with throttle input to move the bike?

No it doesn't happen on idle , only when I give it throttle and especially when I have a load on it

 

[Ridgway81432]

No it doesn't happen on idle , only when I give it throttle and especially when I have a load on it

Sounds like a limiter to prevent high speed in reverse, but you haven't gave us the clue to know for sure....like how fast when this happens.

 

[dezz]

How much of a load are you talking about? I know a few early Yamaha Ultramatic models that had no power in reverse because of the limiter. The 2001-2003 Kodiak 400 was one of the worse I ever used with it. Stick in mud and it would barely move, it at all, in reverse. Forgot about trying to push a heavily loaded trailer backwards.
I never experienced that on my 1998 600. But I also never really had it in a really hard bind in reverse either, at least not that I remember.

 

[Floyd grizzly]

Sounds like a limiter to prevent high speed in reverse, but you haven't gave us the clue to know for sure....like how fast when this happens.

How much of a load are you talking about? I know a few early Yamaha Ultramatic models that had no power in reverse because of the limiter. The 2001-2003 Kodiak 400 was one of the worse I ever used with it. Stick in mud and it would barely move, it at all, in reverse. Forgot about trying to push a heavily loaded trailer backwards.
I never experienced that on my 1998 600. But I also never really had it in a really hard bind in reverse either, at least not that I remember.

Ok I will try to describe it . Runs fine forward starting out from stand still. Then put in reverse from stand still and it wants to die out trying to back up . This doesn't happen all the time but happens a . lot . In neutral it runs just fine too. When I say a load I mean with a trailer on in front of machine which I installed a trailer hitch on many years ago and I use all the time . I love it . Very easy to move trailer around. I have 3 4x4s and this machine has been my work horse for me . I love this machine and will keep it going as long as you boys can help me keep it going. Question for you the wires going into the case left side by oil filter, what is this and how do I unclip the wires from it ,I think I have a short in the wires right their.

 

[reogem]

On the left side of the engine crankcase find a small switch the looks like a small spark plug should have green/blue wire that maybe connected to a green/white wire. Disconnect the wire from the switch ground it to the frame.
This should bypass the rev-limiter.
Ultimately you should replace the switch.

 

[Floyd grizzly]

Ok I will try to describe it . Runs fine forward starting out from stand still. Then put in reverse from stand still and it wants to die out trying to back up . This doesn't happen all the time but happens a . lot . In neutral it runs just fine too. When I say a load I mean with a trailer on in front of machine which I installed a trailer hitch on many years ago and I use all the time . I love it . Very easy to move trailer around. I have 3 4x4s and this machine has been my work horse for me . I love this machine and will keep it going as long as you boys can help me keep it going. Question for you the wires going into the case left side by oil filter, what is this and how do I unclip the wires from it ,I think I have a short in the wires right their.

oil filler not oil filter

 

[dezz]

The wires that run up around the oil fill cap (under a metal tab if still there) is the stator and pickup coil wires. They will run along the top of the engine to rear of it. There will be 2 connectors. One round and one square 4-pin connector.

 

[Floyd grizzly]

The wires that run up around the oil fill cap (under a metal tab if still there) is the stator and pickup coil wires. They will run along the top of the engine to rear of it. There will be 2 connectors. One round and one square 4-pin connector.

how do you disconnect those wires from the case , I need to remove the plastic on the wires and see if their is a short under it

 

[dezz]

how do you disconnect those wires from the case , I need to remove the plastic on the wires and see if their is a short under it

You have to remove the engine case and pull the wires through the grommet. It's a very tight fit, and its a rubber grommet. If the plastic is still on the wires, then they are protected and there will be no short. Do you mean your looking for a broken wire? If so, then remove the engine case cover, and meter out the wires from the stator and pickup coil to the associated pins on the connectors.
Read the service manual first though. You can simply meter out the stator and pulse coil. If you get the correct resistance readings as per the service manual, then you know there is no short and no broken wires.

 

[Floyd grizzly]

You have to remove the engine case and pull the wires through the grommet. It's a very tight fit, and its a rubber grommet. If the plastic is still on the wires, then they are protected and there will be no short. Do you mean your looking for a broken wire? If so, then remove the engine case cover, and meter out the wires from the stator and pickup coil to the associated pins on the connectors.
Read the service manual first though. You can simply meter out the stator and pulse coil. If you get the correct resistance readings as per the service manual, then you know there is no short and no broken wires.

What happens when I change the oil or add a little I blow a fuse .Since this is close to the filler , I feel like their is a short in the wires touching each other. I know this is confusing