So far I have replaced the old fouled plug (cylinder has compression and there is spark), changed all fuel lines, put a new needle in the carb and a bowl gasket, as well as check for spark. On first round of trying to start it, I had the top cap off the carb and after a few pulls it started right up so I shut it off and reassembled the carb. After getting everything set to the factory adjustments for a base line, the wheeler won’t start up but the engine will spin over as if it’s about to take off. I’m no expert when it comes to carbs so any pointers would help, I’m stumped on what to do next.

So far I have replaced the old fouled plug (cylinder has compression and there is spark), changed all fuel lines, put a new needle in the carb and a bowl gasket, as well as check for spark. On first round of trying to start it, I had the top cap off the carb and after a few pulls it started right up so I shut it off and reassembled the carb. After getting everything set to the factory adjustments for a base line, the wheeler won’t start up but the engine will spin over as if it’s about to take off. I’m no expert when it comes to carbs so any pointers would help, I’m stumped on what to do next.

My 99 explorer 300 stopped running a few weeks ago so I did a compression test and have 30 psi. The books state a minimum of 115 psi. So I think I have a problem. With this little of compression could it be just a bad piston ring or something major? Top end rebuild or total engine rebuild? How hard is it to do a top end rebuild yourself? Has anyone done it and documented the steps?

94 300 explorer starts but the motor runs in reverse have replaced the stater and fly wheel replaced the coil and the cdi I’m at a loss don’t know what to do help

94 300 explorer starts but the motor runs in reverse have replaced the stater and fly wheel replaced the coil and the cdi I’m at a loss don’t know what to do help

I removed the secondary to clean it and it came apart quite quickly and I didn’t see which holes the print were in. There is no wear marks or anything to tell where it was set. Any information is appreciated on the proper reassembly. Thanks

I’ve got a good head, jug, cylinder, and piston available from a 1998 Scrambler. Should fit other 2 stroke 400cc ATVs.
If you need it let me know.

I have a 1998 Polaris xplorer 400 it wont start there is good spark but the spark plug is dry and not wet like its not getting any fuel anybody have any help

I have a 1998 Polaris xplorer 400 it wont start there is good spark but the spark plug is dry and not wet like its not getting any fuel anybody have any help

I purchased a 2001 xplorer 400 not running, and I noticed the reverse rev limiter is missing. Is this thing needed, or can you run it without? I am getting no spark. thanks