2003 Yamaha Kodiak 400 - Won't Climb

[CervezaBoy]

Just pick up the atv for the kid , it starts great , runs great , doesn't smoke , on the trails no problem but as soon as you try to climb any kind of a good hill or mud hole it's like you hit a wall and there is no power to keep going . It just runs out of jam and it will just sit there and go no farther with the throdle wide open . Any ideas pls

[oxidized_black]

valve adjustment? if it's running good and has fuel, it might just be timing is off ...

[CervezaBoy]

Someone also said to me maybe pluged fuel filter or pluged up exhaust too much back pressure when trying to make it work hard ??

[myquadrepair]

Sounds like a clutch problem to me. Take clutch cover off and inspect the belt and check the clutch.

[GREENIE]

Sounds like a clutch problem to me. Take clutch cover off and inspect the belt and check the clutch.

thats what i was thinking your belts probably loose or worn out. if it was a fuel issue or plugged exhaust it would run like crap all the time or not at all.

[swampcat07]

When I had jetting problems the main jet was too small and the quad would run fine until it was under load and calling for alot more fuel. I would say give the carb a good cleaning while you are in there checking the belt.

[CervezaBoy]

Ok guys thanks for the ideas , keep them coming just incase it still persists. oh and also when climbing the hills it would go like have half way up and just seem to slow down and then just wouldn't go any farther just like it had no more power and you could hear the motor straining to make it move .

Edited May 23, 2012 by CervezaBoy

[Mudflap64]

I vote belt or clutch issue.