I am having a problem with my 2004.5 Sportsman 500 that I can’t seem to correct. After the bike gets warmed up, the "HOT ENGINE" warning will intermittently flash on the speedometer. There is no evidence that the bike is overheating – sometimes the fan will kick in while the display is flashing "HOT ENGINE" and other times it won’t. At this point, unplugging the thermistor will always trigger the fan to turn on. The thermistor resistance is always well above where it should be for the hot engine. Thermostat has been changed, ECM has been changed, water pump impeller has been checked, thermistor has been checked in a pot of water, air has been bled from rad. Wiring harnesses have been inspected from speedometer,ecm,thermistor,fan. The only other thing is that this began happening after the fan was replaced with an aftermarket unit. Is it possible that the fan is not compatible with the ECM? I know unplugging the fan motor also causes the light to come on. Any help would be appreciated

Having carb issues with my 400x. Anywhere from 0 to 1/4 throttle it pops and sputters and when going to straight to wide open throttle it has a little bit of bog. Running Hmf largest main jet and a bigger pilot jet. Guessing my problem is something to do with the Jets

Having carb issues with my 400x. Anywhere from 0 to 1/4 throttle it pops and sputters and when going to straight to wide open throttle it has a little bit of bog. Running Hmf largest main jet and a bigger pilot jet. Guessing my problem is something to do with the Jets

good evening to everyone, I would like to postpone worries encounter on my Polaris 570 EPS tonight while he slept in the garage for a week, I wanted to restart the surprise and completely empty the battery. I ve reloaded the battery for three hours and luckily it restarts. i’ve removed the key, last run was a 7,34 km run without mud or water.. and my quad is stored in a garage without moisture. I wonder from where the problem can it come?

In your opinion? Thank you for your help. The quad is new (July 2016) and less than 400 kms.

Any suggestions to make test ?

While chasing my hard to start problems, it was recommended I clean the carb. I have done this previously when I installed a carb kit about 3 years ago. After cleaning the carb this morning, I went to assemble, only to find the bowl gasket or "o-ring" wouldn’t fit properly as it is now too big. It also appears the o-ring on the idle jet is soft and deteriorating also. I don’t run ethanol either. You guys ever heard of anything like that?

Not sure what brand of kit I used on rebuild, but I know I bought it at Honda shop. but maybe the rubber isnt quite right and stretched if I got some carb cleaner on it. No Chem-tool, just spray carb cleaner.

Thanks

While chasing my hard to start problems, it was recommended I clean the carb. I have done this previously when I installed a carb kit about 3 years ago. After cleaning the carb this morning, I went to assemble, only to find the bowl gasket or "o-ring" wouldn’t fit properly as it is now too big. It also appears the o-ring on the idle jet is soft and deteriorating also. I don’t run ethanol either. You guys ever heard of anything like that?

Not sure what brand of kit I used on rebuild, but I know I bought it at Honda shop. but maybe the rubber isnt quite right and stretched if I got some carb cleaner on it. No Chem-tool, just spray carb cleaner.

Thanks

While chasing my hard to start problems, it was recommended I clean the carb. I have done this previously when I installed a carb kit about 3 years ago. After cleaning the carb this morning, I went to assemble, only to find the bowl gasket or "o-ring" wouldn’t fit properly as it is now too big. It also appears the o-ring on the idle jet is soft and deteriorating also. I don’t run ethanol either. You guys ever heard of anything like that?

Not sure what brand of kit I used on rebuild, but I know I bought it at Honda shop. but maybe the rubber isnt quite right and stretched if I got some carb cleaner on it. No Chem-tool, just spray carb cleaner.

Thanks

Did a lot of work already so i bring some labor and insight to the table. Now I’m stuck. Bought this recon "needs carb rebuilt". Rebuilt carb and bam, starts right up but smokes white (Seemed to start clearing up towards the end but died before it fully cleared so not sure what’s up). Anyway, I let it run idle for 20 min or so, then took it for a quick spin around the block (no air filter, but not a dusty environment)- aaannddd it dies. Like someone just pulled the spark plug wire. No noise, no stuttering, no putts, nothing. It just instantly shit the bed.

Symptoms- Won’t start, spraying a little fuel out the carb. I can feel suction AS WELL AS AIR COMING OUT of the carb kind of like a push/pull. Will occasionally putt like it wants to start, like a single combustion, but never fully cranks, and this is only with starting fluid. But still no start.

What I’ve tried- Replaced carb with new honda carb. Replaced plug. Checked for spark, it’s there. Fuel flow, it’s there too. Checked valve lash, close enough to .005 (intake seems to be at .004). Checked timing (by eye), both valves closed during TDC on compression stroke. Checked compression, 35 dry 60 wet (read on though). Put 120 psi compressed air through the spark plug hole and couldn’t hear air coming from anywhere outside the engine. Held pressure for a few seconds. Assumed piston rings at this point, removed head and poured about an inch of oil on top of piston. Oil sat there for 30 min before i removed it. So it didn’t pass the rings. Not sure if this is a good test but it seems like a pretty frickin good seal to me. Checked head gasket, no evidence of leak (no dark spots).

All this and still no luck. So here I am, at the mercy of this forum. Please don’t leave me hangin guys lol. Could really use some advice here. I’m not a mechanic but I did everything I could do before asking stupid questions. In advance, much appreciated….Adam

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As a newbie with only 5 hrs of ride time on my ’16 850 SP, I think I just blew a bunch of money on the wrong tires..I live in NY state where it is bone DRY right now as there has been no rain this year..It is rocky, hard pack, dusty, and LOOSE!..I swapped out the stock Maxxis CST’s for Pro Armor Attacks as I wanted the puncture resistance with 8 plys and a deeper tread pattern for better traction..but…Its not what I wanted!… in a word, the performance SUCKS…Not only has the weight of the Pro Armor’s killed the acceleration, but the machine feels downright slow..It bounces wildly uncontrollable over everything..the ride is HARD..no longer can I slip the corners using the throttle because of more roll and weight..going up rocky and loose steep inclines is a nightmare as it bounces hard off everything and always looking for traction..I realized before buying that these tires were heavier and probably perform amazing in muddy conditions, but I never expected them to feel so slow and "loose"..If anything, I thought the deeper treads would feel "quicker" accelerating and climbing but its just the opposite..I should have done more research I guess..So heres what I’m thinking and could use some help..Should I find some tires lighter and more suited to this dry terrain?..and save the Pro Armor’s for a future muddy season?..My choice has taken the fun out of my riding and I’m a bit bummed out right now..Any help would be appreciated..

After lots of research, I finally bit the bullet and bought a winch for my 2015 Rubicon. I had pretty much decided on the Warn Vantage 3000-S and when I came across one on the shelf at Cabelas, I jumped on it. I picked up a KFI mount from a dealership, but no dealership around had the accessory sub harness. That’s the last thing I need for the install, but after reading up on winch installs, it seems that not everyone uses it. I couldn’t find a thread about this, so I thought I would ask. How many of you guys with 2014+ Ranchers and Foremans and 2015+ Rubicons used the sub harness from Honda for your winch install? If you didn’t use it, did you just splice into the 12V outlet?

Also, if you have any advice on the install, please feel free to share!