Youth ATV won't start or runs slow: carb, kill switch and speed limiter
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Applies to: Arctic Cat 90, Alterra 90, DVX 90 and other youth ATVs
Symptoms
- Won't start after sitting
- Starts but only crawls
- Dies when warm
Why it happens
Youth ATVs have a tiny carb that clogs fast with stale fuel, a tether or kill switch that's easy to leave off, and a throttle limiter screw that caps speed.
How to fix it
- Check the tether and kill switch are set to run.
- Drain old fuel and clean the carb's pilot jet.
- Clean or replace the spark plug and air filter.
- Check the throttle limiter screw setting in the manual before adjusting.
Tools and parts
- Carb cleaner
- Spark plug
- Air filter
What the factory service manual covers
Fuel system, ignition and throttle limiter adjustment. The full procedure, specs and wiring diagrams are in the factory service manual for your machine.