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By Dra O
posted a while back - it was running at one point - I have all the plastic shroud off - it's down to frame and engine now
-fuel pump: when line from petcock is attached, no fuel comes out other side to carb; the line to the carb is open (can blow through it); I thought when I cranked engine that the pump would spit out fuel on other side but it does not; I removed fuel pump and opened it up - diaphragm looks good - but internal areas had lotsa calcification build up - I cleaned this out and dried it good - the clear plastic pieces (?diaphragms) aren't broken - the spring w/ steel ball on end moves freely; am putting it back on tomorrow; but can anyone answer about the pump? isn't it supposed to pump fuel through it... to other side... to carb? puzzling
-along with fuel pump: I replaced petcock 3 weeks ago (gas tank had rusty fuel in bottom - cleaned it out prior to new petcock); when I turn petcock arrow NOT to on or reserve, fuel comes out of line; when I turn it to on or reserve, fuel doesn't come out; puzzling
-I don't know what's on back of fuel pump - it's a valve that has a hose coming out of it - looks like it goes to engine/carb - I haven't traced this out yet - what is it?
-can squirt gas on air filter and engine will run for 2-3 seconds then stop - fuel in top of carb (under diaphragm) does same
-it likely needs carb rebuild - will get to this - but something isn't allowing fuel to get from fuel pump to carb
-I THINK it has a mikuni model x carb - diaphragm is ID 26mm OD 68mm - hard to find inexpensive diaphragm, I guess because it's a model x
-last thing - I replaced solenoid due to old one clicking; I HAVE to be charging the battery or it won't start/turn over - battery just goes dead; but if charging, it'll turn over nicely; i'm guessing it's a bad battery
-any help appreciated - I've never owned an ATV before - inherited this beast from grandparent in-law
I have a 2004 Yamaha Bear Tracker in the shop for repair. I have the service manual but it doesn't have all the information I need to fix the problem. I need to know the voltage output of the stator charge coil and pulse or trigger coil at cranking speed. The wiring diagram color code doesn't seem to match and that is compounded by the fact that the wiring harness CDI connector is missing so I have 7 wires that need to be connected to the CDI. I can not find a circuit diagram of the CDI which tells me where the pulse/trigger coil connects or the charge coil connects. The other 3 wires (black ground, orange ignition coil, and r/b ignition kill sw) also need to be connected. The CDI has a single 8 pin connector and has a P/N 4XE-00 F8T19871 -1122 number on it and I believe it to be OEM. However I think the Stator and pulse coil are aftermarket items. I have resistance tested everything and it all seems to be in spec. but I don't want to miss wire anything and cause damage. Any help would be greatly appreciated.
By Scott Sirr
I need to figure out how to clean/fix or replace my neutral switch assembly On my 2008 Yamaha big bear 400 as generally the neutral light doesn’t come on when it is in neutral. To get it to come on I have to wiggle the foot shifter and hold it in just the right spot.
I have googled it and can’t find much on the 400’s. I can’t find a service manual online and the parts manual is super vague.
I think it is in the right side engine cover area, but not certain.
Any help would be great. thanks
By Bronson Weddle
I have a 1999 250 Yamaha bear tracker was told it needed a coil to run got into it to day found out that the kill switch was wired together then I found were they put a new cdi on it they cut all the plugs off the stator wires and the cdi wires I found bits and pieces of wireing diagrams blue pick up wire to red and white green wire to white and green wire rolled it over Had a test light on the coil wire it showed there was juice going to it but no spark on the plug and the coil is a brand new one put it on before trying to test the spark did I miss something or have something hooked up wrong already have plans on a new cdi and stator and pick up coil before I go that far like to hear it run. Thank you for the help in advance
Hi guys I'm in the market for a new ATV. I narrowed my choices down to King quad 750 Grizzly 700 and Rubicon 520, I own a 2006 500 Rubicon right now and I like the reliability and power for plowing. However it is not a capable ATV. When quading with other guys it falls short with ride quality and ground clearance. I also have a 500 King Quad 2015 which I like and will keep it for my wife. It is very strong and reliable also. However my plan is to sell my Honda Rubicon and replace it with a 2020 of one of the these mentioned above. Can anyone give me their take on one or all of these machines and why you picked what you picked?
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By Alan Callison
I just got a 2004 Yamaha that needs some work.Its got wet brakes on the front that Im trying to get working.My problem is the brake lever.This the lever on it now.On the master cylinder it has a cable in it that has the wire that fits in a slot inside the lever itself but this lever isn't made for that.I dont know if whoever had it before didn't know what they were doing or what but its the wrong lever for this machine. Can someone point me in the right direction here? I looked at the Yamaha website and the schematics only show a part that looks like this one here. Again,I have a 2004 Yam 400 Kodiak 4x4 and its an automatic model. BTW,the master cyl. was bone dry. I was gonna change out the rear brake shoes and when I went to pull off the wheel,get this, each wheel stud had 2 different sized washers holding the lug nuts to the wheel rim. The stud holes were so worn out it had worn away the base of the studs and the holes were the size of quarter! Im lucky someone didn't die while riding this! A word to the wise.Pay attention to what you buy.Look carefully and keep a keen eye out. This was my fault because it was the 1st ATV Id ever bought and I didnt notice alot on this machine so I guess I count myself lucky in that I didnt get hurt nor did anyone else who rode it either.
Took my wolvy for her first trail ride past weekend. Got home and cleaned all the mud and dirt off. Went to take a spin around the neighborhood and started having issues.
When you are about 1/2 to 3/4 throttle the RPMs will sudden spike way up with little difference in power to the machine. Once you shift to the next gear it will increase power/rpm consistently then same thing happens and you get a sudden RPM spike. It also seems to recreate the problem if you are low in the gear and try to punch it...High rpm with no power increase. If you shift gears and gradually increase throttle she will increase power and RPMs consistently but if you shift and are more than 1/2 throttle it will increase power and RPMs fine until you get about 1/2 to 3/4 way through the gear then you get the same RPM spike...
Hope I am explaining this clearly. My truck did a similar thing once and it turned out to be a whole new tranny...hope this is a different issue. Thanks for your help guys and gals.
Wondering if anyone has an idea on what's wrong with my atv. I have a 2004 yamaha bear tracker 250. It runs perfectly fine in idle, but when I give it throttle it dies. Any suggestions are appreciated.
I purchased my kodiak earlier this winter. It was a being stored in a heated shop however when I went to pick it up, it was sitting outside in -20 and the throttle was froze shut. The bike seemed very clean with no mud on it so perhaps the PO washed it before storing it and some moisture got in the cable.
My shop is unheated but in an effort to get it going, I made a little tarp tent and stuck a construction heater under it. Throttle cable came free and the bike started up an ran fine. 2 months later the bike is just sitting in my shop not being used. The throttle still freezes shut when the shop is cold but today, it was warm enough that it was free. But I wonder if there is an issue with the choke cable sticking? The bike seems to flood and won't start.
I built my tarp tent again and warmed up the quad with the heater. Not sweltering hot but warm. I could get the bike to fire a couple times but then it seemed to flood again and wouldn't start. So is there something causing the choke not to work related to the cold? The lever seems to flip up no problem but not sure if it is doing something on the carb end causing it to flood and not start. The plug is new, spark good, and a nice mist of gas comes out of to piston when it's flooded.
I don't want to tear into things if I just have to wait for warmer weather but would still like to get some early spring riding in. Any help?
Hello, I have a 2005 Suzuki Eiger Quad runner. 400 4x4 Auto
Starts ok. But when I push on the throttle, it stalls. Maybe the carb needs adjusted?
There is some kind adjustment wheel that turns. I suppose this adjust fuel/air mix to carb. Either way I turn that, it still stalls when gas applied.
Our Suzuki dealer is no longer here, Honda will not work on it...
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