I bought my first dirtbike tonight, Yamaha RT180, and it started up easily enough at the sellers and ran fine. When I got it home I couldn't get it to start. I replaced the gas, drained the float bowl, etc.
On checking for spark by pulling the plug, grounding it, and cranking the bike over I'm noticing that there won't be a spark for maybe 15-20 cranks and then it will come on for a dozen or so and then go off for a while again. Really weird.
Can anyone shed some light on what's happening? I really need to get this bike working reliably since it's elk season.
Thanks.