Took my new to me ,01 426 out today for the first ride..What an awesome machine..! Did the bk mod, and it started easily hot or cold, starting was not an issue.. Ran some singletrack and some jeep roads.. This bike will make me a better rider, I found it a lot less work than my cr 250..Ill check my plug color to make sure its burning clean... I havent checked the valves yet, what would be a symptom of valves being out of spec..?