Re: Yumpin Yimminie!
I've got an '87 CR500 with a clean-and-match port job, .80 over. Noleen modified forks & shock. 15/47 gearing. I've never had it timed, but it walked away from a buddy's 1 yesr old KTM EXC520 at 92 mph (per his speedometer).
If the CR rider would have started the bike in 2nd gear, I guarantee he would have won. If tuned right the CR accelerates like an F1 car. I know it soulds like BS, but I've never lost a drag race (in the dirt).
BTW this is the same buddy who traded his '91 KX500 for the new Katoom. I never reallly liked his KX, it always felt like you were riding an oil-drum with footpegs. Way too big.
Starting one is no problem, just get the kickstarter ratchet at the top of the stroke and KICK (prime it first with 7 or 8 real slow kicks). My CR starts on the 1st kick most times. if you follow the above drill.