Kymco 2008 Mongoose 250 - Answered Questions & Fixed issues


Hi Matt only help I can give is look along top & bottom of chain for a tensioner it will be a round rubber wheel. If you cant find a tensioner it will more than likely you need to cut the chain down. If your not sure how to let me know & i'll let you know how. Also DO NOT USE IT while chain is loose as if you do & chain comes off you can crack engine case which then means a new engine

Kymco 2008... | Answered on Jan 23, 2014 | 697 views


if your getting spark, compression and gas, check your mechanical and electrical timing.
Make sure there is plenty of charge in the battery.
Can you feel any suction on the carb when you cover the intake with your palm and crank the engine?
Can you feel the exhaust blowing as you crank?
If these are all OK you could have an issue with the ignition electronics.

ATVs | Answered on Nov 27, 2020 | 16 views


There may be one or more causes for the P0485 code. One is a faulty cooling fan. Another is that your fan control relay harness is shorted or open. Your fan control relay or fan control circuit may also suffer from a poor electrical connection.

ATVs | Answered on Nov 27, 2020 | 15 views


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ATVs | Answered on Nov 25, 2020 | 16 views


Make sure the spring on the brake pedal that operated the park interlock hasn't stretched or come off the interlock, If the interlock and spring are ok,the problem most likely is behind the gear selector cover on the transmission. Water,moisture can get into this area and corrode the shift gears up or possible you could have broken tooth on one of the small gears

ATVs | Answered on Nov 22, 2020 | 169 views


yes and if its charging,,also make sure a groups are clean and grounded well


ATVs | Answered on Nov 22, 2020 | 12 views


If the soleniod engages and no starter motor run.....the solenoid is bad or bad starter motor brushes.....do not rap on the starter ......the permanent magnets are subject too damage ......replace the starter ..........

ATVs | Answered on Oct 22, 2020 | 27 views


Do not know where to begin. Does the engine have compression? Are the valves adjusted correctly? Is it getting fuel, fresh fuel? Is there a spare to the spark plug? Is voltage getting to the ignition system, all fuses ok?

ATVs | Answered on Sep 25, 2020 | 27 views


• There is a problem with one or more of the following:

1) Dead Cell In The Battery
2) Plug / Connection Came Loose / Bad Or Missing Ground Cable
3) Voltage Regulator
4) Stater Is Bad
5) Wiring Harness Has A Broken Or Grounded Wire

ATVs | Answered on Sep 05, 2020 | 64 views


It might be the spark plugs or plug , but it looks like a fuel, pressure, filter,and injector problems Changing the plug is really easy. If it still occurs , change out fuel and then check the fuel pressures.

ATVs | Answered on Aug 19, 2020 | 27 views


First check to see if it has a spark or fuel by spraying a little starting fluid into the throttle body. If it does not, check the fuse to the fuel pump. If it runs then you check to see if the spark is getting to the spark plug. If not check the fuses and connection to the ecm.

ATVs | Answered on Aug 11, 2020 | 156 views


Lube the shifter control box.

ATVs | Answered on Aug 08, 2020 | 140 views


Two possibilities. One is that the bulb is bad and the other is the gear indicator/wiring has a problem .

ATVs | Answered on Aug 08, 2020 | 126 views


Here is how to check the oil and more.
https://www.youtube.com/watch?v=Du8j-R35ni0

ATVs | Answered on Jul 30, 2020 | 30 views


To me it sounds like, possible fuel lines being clogged and maybe need replaced. If you can prime it, and it ??s for 5 to 10 seconds, sounds like its just not getting fuel fast enough or at all through the lines after the initial prime and fire up. Possibly a new fuel pump may be needed. But definitely a fuel system problem. Good luck

ATVs | Answered on Jun 18, 2020 | 53 views


Check for water in the fuel. Also check the carburetor bowl for fuel. You can disconnect the fuel line at the valve and run a bit of fuel out, make sure to run in both on and reserve position. The carb has a small fathead screw for a drain. Back it out a few turns to release the content of the bowl. Also check the air filter under the seat. Make sure it’s clean.

ATVs | Answered on Jun 16, 2020 | 62 views

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