2005 Sportman 500. Cannot start. No electrical

Sounds like it is running lean. Adjust the air fuel mixture. If that does not help, may need to do some carb work.

DO NOT JUMP WITH A CAR BATTERY.. the amperage is TOO high for a quad electrical system!!

Take your battery to O'Reilly's or AutoZone and have the CCA (Cold Cranking Amps) checked.. it takes amperage to crank your ATV..not voltage..
DO NOT EVER JUMP YOUR ATV WITH A CAR OR HI-AMP BATTERY CHARGER..TOO MANY AMPS!!!!

Have a qualified professional clean and set the carburetor...it will make sure the starting process is easier...new spark plug too... and check the air filter...replace if not perfect!!!

Same problem with my mxu 500. Charged battery. Nope. Checked all connections in starting system. Nope. Swapped out solenoid relay. Fixed mine. Was cheap online- less than $20. Mine would start with jumper cables or batt charger on 80amp boost. Good luck!

Check your fuses

1. Need a new battery
2. starter solenoid is defective
3. starter needs rebuilding...

Does Solenoid click when trying the electric starter? CAREFULLY jump the two terminals on the solenoid (SPARKS WILL FLY).. IF the engine turns over or starts, THE SOLENOID IS BAD. just replace it.
If it clicks when you are trying to start it electrically, use a multimeter (voltmeter) to see if you are getting 12v to the starter connection while you are trying to electrically start it. (+) lead on starter bolt and (-) to a motor mount bolt. If you get 12v+, starter needs rebuilding!

I had this problem with Artic Cat 500 and after ensuring the electric shift was working I discovered the mounts for the front drive shaft had broken and would not allow the shaft to engage. I suspect mine was caused by plowing but any number of things could break or bend these.

check atvconnection or quadcrazy forums

The starter has to throw it's gear out using centrifugal force. The speed of the starter has to be enough to overcome the spring inside. It is either a little seized and needs to be rebuilt and greased up, or the battery isn't powered up enough to get the right speed to engage properly. In that case clean the battery posts and clamps well, then charge or replace the battery. To know if the battery is bad wait till it is charged... if it still doesn't engage try again with booster cables from your car etc. and see if it suddenly works fine.