Overheating I have a 2005 sportsman 800. I'm having problems overheating. Raditor is clean,seems like fan does not come on in time.

Ok the 6 amp fuse is for the ecm the 15 amp fuse is for the cluster one of the 20 amp is main power the outher 20 amp should be for the starter and charging circuit .your over heating problem could be in the fan temp sensor you will find it on the left side of the machine on top of the thermostat housing , take and disconnect the plug on it and jumper the two wires togather with key on fan should come on if it does replace fan temp sensor .if not visibly pull each fuse out and look to see if is burnt odds of the fan being bad is very uncommon. This will be all good if is an EFI 800 hope that is helpfull

sounds like loose wire connector or ground wire clean all connectors and battery cables

What year is your sportsman

Hey Peter,
Sounds like the temperature sensor/fan control has gone bad...

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sounds like linkage problem check linkage

Sounds like you have a problem in the charging system. The alternator is giving the system enough charge with no lights but cant keep up when lights are on. This also happens if you are running other lights without being correctly connected through a relay.

CARBS NEED TO BE WORKED ON .

You will have to get the cooling fan working before you look any further. It may be best to have a coolant system pressure test and a compression test done to eliminate engine fault also

Check Float Height and reset the airscrew to around 1 -1 1/2 and make sure all jets are clean