00' XR100R not starting, what gives?

[volcomrr]

So I put a fresh front tube in Sat since it was flat and thought I had the XR ready for my dad to ride to the starting gate for the race on Sunday, guess I was wrong.

Sunday comes around, and the ol' XR won't start!?! I've had the bike since brand new and it's the first time ever that it hasn't started. Dad went and bought a brand new spark plug since the other one wasn't getting too great of a spark, but still, it wouldn't start. I have no idea why I won't start. It was serviced by a honda dealership about 3 years ago, the first time it had ever been serviced (as far as valves and idle goes).

It was really cold yesterday, prob in the mid 40's. But we tried starting it later in the day when it was in the mid 60's but still, no go. Just didn't sound like it wanted to fire.

Any trouble shooting ideas? Thanks!

[4strokeridertt]

If you have not used it in a while I would guess the jets were clogged.

Clean the carb and be sure the jets are clean.

[bintwert]

i would say the carb also,since it has spark......rebuild the carb.

[condor74]

I had the same problem with mine and the jets were clogged. I removed the pilot jet and ran a single strand of copper wire through it till it was unplugged. The main was not plugged but I soaked it in carb cleaner and blew air through it. I also took apart the rest of the carb and soaked and blew air through all the ports. The thing that took the longest was clearing the obstruction from the pilot jet. Everything else took less than 10 minutes. After that the bike started and ran like new.

[socalxr]

Yep, clean pilot, then check the valves. 1/2 hour for everything.

[volcomrr]

survey says.... carb. I'll take it off and clean it. Thanks fellas!