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I have a 2003 Kodiak 450 that i purchased a while back with around 300 hours on it. It has never ran right from the beginning. Initially i thought it was just a carburetor issue because it was all clogged up from sitting for months. It has been cleaned, rebuilt, and taken off probably about 10 times troubleshooting this problem. I have quadruple checked everything including float height ect and it is set correctly, the jets are also brand new, needle and seat have been pressure tested as well. So after all of that I am convinced that the carburetor is not the culprit. I have an issue where the idle is very choppy, almost as if it is misfiring with a rich condition on top of that. I can use a brand new plug and run the machine for just a few minutes and it will be a dry and and coated in black carbon build up. The exhaust also has a strong smell at idle. I had trouble restarting it when hot for a while, but i adjusted the valves and it seemed to solve that issue. They were both way out of tolerance (tight). The weird thing is, outside of idle it seems to run pretty well.
So with all that being said I have ruled out the carb/valves/compression and moved on to the ignition and this is where i have a few questions about factory specifications. I guess the main question I have is, how strict are these tolerances? And could them being off by this amount cause the issue I am having? Do all three of these parts really need to be replaced? I would like to know before I spend the money on these new parts, and it not fix my problem. Below I will list what the specs were in the service manual along with the reading i got. This is my first experience testing ignition components. I just found it odd that all 3 are out of spec according to the service manual.
Spark plug cap resistance: 10 kΩ at 20 °C (68 °F)
My Reading: 8.90 kΩ
Primary coil resistance: 0.18 ~ 0.28 Ω at 20 °C (68 °F)
My Reading: Fluctuated between 0.4 - 0.5 Ω
Secondary coil resistance: 6.32 ~ 9.48 kΩ at 20 °C (68 °F)
Reading was within the specified range.
Pickup coil resistance: 459 ~ 561 Ω at 20 °C (68 °F)
Reading was within specified range.
Rotor rotation direction sensing coil resistance: 0.085 ~ 0.105 Ω at 20 °C (68 °F)
My reading was 0.3 Ω
So yesterday I picked up a 07 polaris sportsman 800efi stealth edition for 3k. Will lead a pic ltr. In good shape. Here's what's wrong with it:
The rpm needle doesn't work just like my other sportsman... not too worried ab that.
The motor doesn't sound like it's running quite right and doesn't feel like it has much more power than my 500. I'm thinking it needs a tune up and some fresh oil.. but also it feels like it's running rich. It's a little buggy when you goose the throttle and sometimes farts when you let off (like I little backfire out the exhuast). I'm gonna check timing and valave clearence on the motor first but thinking of putting a tuner on it? Anybody got a suggestion? Mainly looking for more power.
The rear brakes on this are hydraulic and manual. The hydraulic part is all messed up so I disconnected it all and want to go just manual on the rear. I got it all put back together but doesn't seem to work to well, like not enough pressure. The manual says I should mark the casing before taking it apart which I didn't read until to late. Any ideas? I put new brake pads on.
By Frank Angerano
Hello everyone, back from a crazy few months of riding, hunting and fishing! So I’ve added a storage bag to one of my bikes and loaded it up pretty good before we went out into the woods/trails etc. My son questioned me and said what do we need all that junk for? I told him you never know maybe a flat tire water etc.
Needless to say that junk came in handy. So my question to everyone that hits the trails is what do you have or recommend to maybe take with you before you go? And what would be the one most important thing that’s a must have?
And also any recommendations on a storage bag that’s not so costly and performs the best? I like my bag but not very good .
Over the years I have always used a friends machine, and only ride a few times a year. Last week I purchased a 2002 Polaris Sportsman 700. The front diff needs a rebuild, the axles are very loose where they go into diff. My question is, both front wheels rotate forward by hand, but do not rotate the opposite direction. Is this "NORMAL OPERATION" I plan on rebuilding the hubs at the same time as the diff.....
My question about the rear diff, it rolls as if the machine has a total POSI rear axle...……. I lifted the front end off the garage floor with overhead hoist, as I moved it sideways the rear tires skidded rather than rotate. Both would roll forward easy, but not go in a circle. When I drove the machine in the garage making a tight turn I could feel the binding and skidding of rear tires.... Even if the switch was in 4 wheel drive, when it's hanging in te air the ignition is off...….. with the machine in 2 wheel drive mode, is that HONESTLY 1 wheel drive to allow turning without tearing up the lawn? then it locks the rear axle once it's put into 4 wheel drive? I'm guessing the rear diff needs a rebuild also because there is something "BALLED UP" internally locking the rear wheels together?
It's a old machine that was not maintained, I thought the wheels were all rusted, but it was 17 years off baked on red clay. Just wanting to make it a reliable machine. I have great mechanical ability, just lacking a little knowledge of what is suppose to be "NORMAL OPERATING STANDARDS"
Thank you in advance for sharing your knowledge.
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Problem: The ATV starts and runs at idle perfectly. But as soon as I open the throttle, the engine starts to slow down until it stops. On the attached video you can hear the sound of how it works: see video below
Prehistory: there is a Polaris Sportsman 500 1998, which for about 1.5 years stood in repair, including also replacing CDI with one taken from the same ATV. Finally, the vehicles were on wheels, traveled several kilometers and overheated - forgot to fill the antifreeze Came back home in small moves. The next trip started well, but after 10 km there was a feeling of a small drop in power (even as the vehicle got warm completely) but still drives. Next trip - the situation is repeated. The next test of ATV through time and a huge loss of power from the very beginning. The engine sneezes, does not want to go more than 5 mph.
What has been done: the carburetor has been replaced with a new one (inexpensive, $ 40), a new spark plug, a new ignition coil, the engine head has been removed, the piston is in good condition, valves were corrected - but the problem was definitely not in them.
Ignition control unit is suspected. Who faced similar? Please help in solving the problem.
Thanks in advance.
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