My four wheeler it will start but won't accelarate

some four wheelers require a battery to run correctly. sounds like you need a new one.

if your four wheeler is back firing you may have water in your gas or your gap on the plug

then the carburetor jets are cloged up. take it apart and do a good cleaning on it.

every four wheeler I've ever worked on has the ignition timing fixed and controlled by the CDI. Mechanical timing usually invovles lining up the T on the flywheel with a mark on the cam shaft. you'll need a service manual for more specifics.

Need to know more info please to narrow down this problem

Dead battery or solenoid

push it off a cliff

could be the spring is worn,loose, or you have taken it out before you didn't tighten up the spring.

should be 12v

1. eHow
2. Car Repair & Maintenance
3. Car Oil Maintenance
4. Drain Car Oil
5. How to Repair a Polaris Four Wheeler

How to Repair a Polaris Four Wheeler By Brianna Byrne, eHow Contributor Spark plug inspection and adjustment can be one way to repair a Polaris ATV.

Almost every vehicle needs regular servicing and repairs in order to continually perform at its best, and Polaris' lineup of four wheelers is no exception. The company has released dozens of ATV makes and models throughout the years, ranging from sporty racing quads to youth models to heavy-duty utility ATVs. Despite the differences between the company's many makes and models, general repair tips and troubleshooting instructions remain consistent for all Polaris four-wheelers. The electrical, ignition and fuel systems are some of the most common sources of Polaris ATV problems.

Read more: How to Repair a Polaris Four Wheeler ' eHow.com http://www.ehow.com/how_8074861_repair-polaris-four-wheeler.html#ixzz26pmQIzeh