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What in the hell is wrong with Yamaha???????? (Read 17951 times)
Vulcan
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Re: What in the hell is wrong with Yamaha????????
Reply #50 - 08/01/07 at 17:04:35
 
Well after reading and testing I can't seem to find out what all the hipe is. I have had nothing like this happen on the 700 or 660. I guess the problem is not going to happen in the super heat of Florida or we just got the best grizzlys made  Smiley When we first got the 700 and took it to Utah one day it had a little pressure when I refuel but that was in the morning before it had a chance to heat up at all. I drove it from one end of the hotel to the other where the gas pumps were. I opened the fuel cap and I heard air it could have been going in or out I don't know but it was for one second no gas spill, no problems at all. I wounder if the problem has to do with pressure from sea level to 7000 ft heck it is only 14.7 psi at sea level Hum............... anyway something else to think about. Pa Pa Jack please post what you find from your meeting and I'm looking now for a good way to insulate the silly tank on the new 700 just to be safe should be a easy task  Smiley
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Big_Ben
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Re: What in the hell is wrong with Yamaha????????
Reply #51 - 08/01/07 at 23:47:20
 
Thanks to PaPa Jack I to contacted The Consumer Safety Counsel. I received a call from their office in Vegas. They seemed to be very interested. They wanted to come out and look at the machine but of course I'm up here in Marysvale. I told him about this form and he said he would check it out.
Vulcan you are right according to factory rep there has been little problem at sea level. According to what I found out , Yamaha has no real solution. Oh yes they are sending me one of the bigger roll over valves. They have had limited success with them.
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GrizzlyGuy
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Re: What in the hell is wrong with Yamaha????????
Reply #52 - 08/02/07 at 08:39:09
 
Here's a bit more info for the gas-boilin' pot. In a post a week or two ago, I reported an early out-of-gas symptom on my 700 when I tried running it with the venting cap from my 660. I wasn't sure if the venting caused that problem, or I had some other problem with my Grizzly.

To figure this out, I did a 2-day expedition ride in the Plumas NF with all gear on board and the standard gas cap in place. On day 1, I ran it right down to the fumes level and practically coasted into my campsite for the night. So no early out-of-gas problem with the stock 700 cap in place.  Smiley

But boy oh boy, did I have some boilin' on that trip! For example, I wish I had an audio recorder so that you could hear the roil/toil/boil/venting sounds when I finished riding this thing:

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Wow, that has to be in my top 5 best trails EVER list. Steep, rocky and nasty. Imagine taking the steepest parts of Barney Lake, making them 3x as long, and maybe 10 degrees steeper. Instead of big boulders that you navigate around, you have lots and lots of smaller, mobile rocks that you have to go through and over. Rocks that are just big enough to whack your bash plates and have a tendency to roll/move just when you don't want them to.   Smiley

The trail was so steep that I had to frequently apply the brakes while crawling down it in 4WD low. I was wondering if the Grizzly would have enough power to get me and all my gear back up it.  Undecided

I don't know why anyone would put a town at the bottom of this monster, but they did back in the old days, see here:

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The forest service even put a campground at the bottom so you can rest your vehicle and nerves before heading back up:

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Before I headed back up, I decided to "cool the tank" just a bit in this neat little stream crossing:

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Anyhoo, back to the gas boiling issue. With nothing left to do but say a little prayer that the Grizzly could handle the climb, I hit the gas and started back up. Most of the way I was standing and leaning out over the front rack in ski jumper position. The power steering worked great to reduce the effort on this climb.

I tried my best to avoid the rocks, but I counted at least a half-dozen loud whacks to my bash plates. At one point, I somehow high centered myself on a mobile rock, had all 4 wheels off the ground, then the rock rolled and I plopped back down on the ground a couple feet lower than where I had gone high centered.  Grin

I didn't let off the gas until I was all the way back up at that sign. I figured that as long as I  had momentum, I was going to make it. But stopping could be a problem. Oh, and that's why I don't have any pictures of the trail itself. Sorry about that.  Sad

The Grizzly had plenty of power for the climb, but all that hard work really maxed out the heat transfer to the tank, and it was making all kinds of sounds at the top. No worries for me, I just left the cap on and kept riding after taking a few minutes to catch my own breath.  Smiley
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hemingray
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Re: What in the hell is wrong with Yamaha????????
Reply #53 - 08/02/07 at 09:08:59
 
I hope you came into that campground from the north! Smiley

With the new tires arriving today, I've already started lobbying for bash plates ("what do you need those for, honey?") Gotta do that trail and area...
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GrizzlyGuy
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Re: What in the hell is wrong with Yamaha????????
Reply #54 - 08/02/07 at 09:46:35
 
hemingray wrote on 08/02/07 at 09:08:59:
I hope you came into that campground from the north!  Smiley


Rolling on floor laughing

Yes Dave, I did. I even have a track log to prove it. I was 100% within Plumas NF in and out of Poker Flat, TNF land didn't start until about 100 yards past that stream crossing:

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This is great news, one of the best trails in the Western United States is open and ridable right now!  Smiley

Yup, you need to get those bash plates. I don't even want to think what would have happened to my Grizzly without them on that monster.  Shocked
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Re: What in the hell is wrong with Yamaha????????
Reply #55 - 08/02/07 at 19:49:50
 
Thanks Big Ben for the report it is all coming together why I don't seem to have the gas problem. I hope they get a fix before we move to Utah and GG keep them awesome pictures and reports on the gas problem coming. If Yamaha can't fix the problem and someone goes up in smoke it will be a good thing to have all the post to show that people in the mountain are having problems if a law suit comes up.
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GrizzlyGuy
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Re: What in the hell is wrong with Yamaha????????
Reply #56 - 08/03/07 at 13:58:18
 
I just got back from hauling our Grizzly 700's up to my Yamaha dealer for their first service. They still hadn't heard anything about this issue. I described it to Andy (their best mechanic) and he said it sounded more like a venting issue. I described my experiment and the early out-of-gas symptom, and he didn't seem surprised that adding additional venting had thrown off the EFI system and/or fuel pump.

So if you install that new rollover valve Big Ben, you might want to bring along some spare gas until you can run it well into the reserve zone and confirm that the valve doesn't vent it TOO much like my 660's cap did.
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Frank B
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Re: What in the hell is wrong with Yamaha????????
Reply #57 - 09/05/07 at 10:39:02
 
Quote:
So if you install that new rollover valve Big Ben, you might want to bring along some spare gas until you can run it well into the reserve zone and confirm that the valve doesn't vent it TOO much like my 660's cap did.


So, GG.....did you go back to the OE gas cap on the Grizzly? What happened with the 660 cap installed?
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Big_Ben
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Re: What in the hell is wrong with Yamaha????????
Reply #58 - 09/05/07 at 23:25:33
 
The new roll over valve is helping. It is not boiling as often and has not effected the mileage or the gas gauge.
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GrizzlyGuy
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Re: What in the hell is wrong with Yamaha????????
Reply #59 - 09/06/07 at 15:00:33
 
Frank B wrote on 09/05/07 at 10:39:02:
Quote:
So if you install that new rollover valve Big Ben, you might want to bring along some spare gas until you can run it well into the reserve zone and confirm that the valve doesn't vent it TOO much like my 660's cap did.


So, GG.....did you go back to the OE gas cap on the Grizzly?  What happened with the 660 cap installed?


Frank,

With the 660's fully venting gas cap installed, I received an "early out of gas" symptom as I Multimedia file viewing and clickable links are available for registered members only!!  You need to Login or Register!!
. If there is one thing worse on a trail than having boiling gas, it is having your quad being effectively out of gas.  Sad

I suspect (just guessing) that the early-out-of-gas symptom was triggered because Yamaha designed the 700's fuel system to be pressurized, and venting all that pressure threw off the fuel pump or EFI.  Questioning

So with that little science experiment performed, I have since went back to my stock fuel cap and have experienced no problems. Let me clarify what I mean by "no problems", just to be precise: My fuel may or may not still be boiling, I don't care, I don't consider its boiling to be a problem because I don't plan on removing that gas cap while it is hot. It can roil/toil/boil all it wants and I'm fine with that until (and if) Yamaha issues some kind of official recall. An official recall will indicate to me that their engineers will have been involved in the process and resulting improvements.

That having been said, I fully understand that lots of other people consider any boiling to be a problem. They have a right to their opinion, can modify their machines, complain to Yamaha, bring in the federal government, or whatever... but my Grizzly runs fine, I feel perfectly safe operating it with its stock fuel system configuration at all temperatures and engine loads, so I'm good to go.  Smiley
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Grizzly Man
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Re: What in the hell is wrong with Yamaha????????
Reply #60 - 09/14/07 at 17:46:22
 
Update.
In early May I filled out the paperwork with the Consumer Product Safety Commision on the geyser of gas that erupted from my Grizz.

Recieved a call today from Teresa at the CPSC in Denver. We talked for about an hour with her asking many questions. Towards the end of her call she stated that if I knew anybody else that had this problem to please call the CPSC and report the problem. She seemed to think the more that complain the sooner Yamaha will buck up and do something.

So, if you have had any kind of problem with your Grizz boiling gas please call the CPSC at 1-800-638-2772 or visit there website Multimedia file viewing and clickable links are available for registered members only!!  You need to Login or Register!!
and click on report an unsafe product.
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Frank B
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Re: What in the hell is wrong with Yamaha????????
Reply #61 - 09/26/07 at 20:51:27
 
GrizzlyGuy wrote on 07/18/07 at 07:44:09:
RG,



If anyone wants to start a recall pool just for fun, where we try to guess the date of the recall, put me down for 10/20/2007. ;


Put me down for gas boiling recall: Feb. 29, 2099!   Grin
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Mark
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Re: What in the hell is wrong with Yamaha????????
Reply #62 - 12/23/07 at 16:26:47
 
Long time fan first time poster-

Is this tank pressure problem something that all Grizzly 700 owners experence? or just a small percentage

I am a Grizzly wantabee, but a couple of small issue's are holding me back. The tank pressure and I have heard of idling and stalling issues.

I am hopefull that with some additional time, Yamaha will have this issues ironed out.

I currently ride a 04 Kodiak that I have had no problems with.  Embarrassed
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GrizzlyGuy
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Re: What in the hell is wrong with Yamaha????????
Reply #63 - 12/23/07 at 18:34:20
 
Mark,

Welcome to the forum!

Both of my 700 Grizzlies boil gas. Mine boils it more than my wife's special edition for some reason. No worries, I just don't remove the caps when the engine is hot. She knows that she is to NEVER remove that cap and always let me be the gas-gusher-goober. This works fine for me. Frank's recall guess date may turn out to be the right one, so consider that you may have to live with this forever if you get a Grizzly. If your risk management threshold isn't the same as mine, then maybe consider a KQ, Polaris, or something else.

There is a manual idle adjustment which I have futzed with to get the idling where I want it. Too fast, and its hard to shift. Too slow, and it will stall more while trying to idle. I either haven't experienced it stalling while riding along, or I don't remember it happening. You can start these while they are still in gear so that would help even if it happened.

There was also talk of cold starting issues. The answers floating around seemed to be to adjust the fuel mixture via the control pod. Well, I've got some inside information on this. The mechanic at my dealer was the guy that Yamaha had run the cold starting tests for them (because it is cold around here and Andy is one of the best mechanics on this planet). He dutifully set the Grizzly up like they wanted him to, did the testing, tried the various fuel pod settings, etc.

Then one day Andy figured out what the problem was. Yamaha was wrong: it wasn't the fuel system, it was the oil. People had been running 40W oil, and the viscosity goes to heck at low temps. We all run 30W around here. Andy put in the 30W and problem solved. Hopefully Yamaha has changed their oil type recommendations for those of us living in the cold areas. I don't ride in the winter so I probably would have never experienced that problem anyway.

Hope that helps.  Smiley
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Re: What in the hell is wrong with Yamaha????????
Reply #64 - 12/23/07 at 18:37:45
 
I have the 07 Grizzly.  Never had the stalling problem. I had the fuel bubbling but I put the new "roll over valve" in and no more problems.  You can do it yourself but the part will cost you about $20.  Or have the dealer do it under warranty.  I opted to buy the part because I don't trust dealerships.
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Mark
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Re: What in the hell is wrong with Yamaha????????
Reply #65 - 12/23/07 at 18:52:27
 
Thanks for the reply, I think I will be able to sleep tonight. It sounds like the problems mentioned are all manageable.

How would you expereniced Grizzly owners rate the ride quality?

I am looking for a smoother ride than my Kodiak solid rear axle can offer, something that is a little easier on the back.
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Re: What in the hell is wrong with Yamaha????????
Reply #66 - 12/24/07 at 08:32:57
 
All my rides are over 100 miles a day.  Without a dought the most comfortable ride I've ever had.  This is going to sound funny, but at first I thought I was cheating, having power steering.  ATVing was supposed to be a little tough on the body.  I quickly overcame that thought.  We have Kodiaks and other Grizzly's, they don't compare.
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Re: What in the hell is wrong with Yamaha????????
Reply #67 - 12/24/07 at 09:20:14
 
Mark wrote on 12/23/07 at 18:52:27:
Thanks for the reply, I think I will be able to sleep tonight. It sounds like the problems mentioned are all manageable.

How would you expereniced Grizzly owners rate the ride quality?

I am looking for a smoother ride than my Kodiak solid rear axle can offer, something that is a little easier on the back.


nearly 2000 miles and I love it.  Its simply a great machine, handles well plenty of power and the steering is ............well its just peachy
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GrizzlyGuy
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Re: What in the hell is wrong with Yamaha????????
Reply #68 - 12/24/07 at 10:27:21
 
Mark wrote on 12/23/07 at 18:52:27:
How would you expereniced Grizzly owners rate the ride quality?

I am looking for a smoother ride than my Kodiak solid rear axle can offer, something that is a little easier on the back.


Oh my gosh, you are going to LOVE the difference in rides. We used to have one of the straight-axled Kodiaks for my wife. She hated that thing, and I hated that thing, so we got her a 660 Grizzly back in 2005. What a difference that made.

The 700's feel about the same as the 660's to me in terms of ride, but I can feel the improved lower CG on sidehills. I managed to turn mine around on a narrow rocky hill with a slope of about 50 degrees a few months back. It took me many minutes of careful maneuvering, but I suspect the 660 would have rolled in that same situation. CG matters.

The power steering is un-be-lievably good. At first, I didn't want to buy one because I was worried about the gizmo failing in the field. Then Vulcan ran a simple test: he disconnected power from the gizmo, rode around, and reported that it steered about like a 660. After RedGrizz reported more good news about that (how it really improves handling in the rocky stuff I like to ride) I went ahead and bought them. Boy was I glad I did.

Think of the power steering as a safety feature. It really is. When you're crawling through big boulders like out on Multimedia file viewing and clickable links are available for registered members only!!  You need to Login or Register!!
, and a 1" difference in your line means you're going to roll, the ability to effortlessly adjust that line as you crawl is a huge big deal. Even if you're just doing normal trail riding, it is neat. When I do a 100+ mile ride on the 700 it feels like I did a 20 mile ride on the 660. Un-be-lievable until you experience this.  Smiley
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Re: What in the hell is wrong with Yamaha????????
Reply #69 - 12/24/07 at 11:11:05
 
Thank you for the reply. Great info in finializing my purchase plans. I will let you know when I have a Grizzly in my garage.
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Re: What in the hell is wrong with Yamaha????????
Reply #70 - 08/27/20 at 12:59:46
 
Hello all. I realize this thread is ancient, from 2007. But I know a guy that was critically burned in 2017 when his 2011 Grizzly did the geyser gas thing. He nearly died. We know about Yamaha's attempt to fix the problem in 2008 with a larger fuel tank vent valve. Anyone know of these incidents continuing to happen in newer Grizzly 700s? Message me Smiley
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