Snowmobile Repair: help, snowmobile service manual, kawasaki 440

Question
Hello again
I have a another question for you where would I find the model number or the serial number. There is a  number on the engine there is two on the foot wells and were I can pick up a manual or tips / guidelines for a Kawasaki 440 drifter { not sure what year]  and also how would I find the year.  so if you know the answer to these questions can you please get back to me thank you. and you were asking me for the model numbers so i got all the numbers off the snowmobile hear they are TA440B-c201 this one was on the engine
    906772A             SB440A4-003658           both of theis were on the foot well         Gooshpimp@aol.com  

Answer
Hello Frank,

  According to your Engine model No. your sled shows up as 1980 Kawasaki Invader 440. The best basic manual is Intertecs Snowmobile Service Manual, 11 Edition, but I'm not sure if it covers your specific sled. You can find this manual at Amazon.com. Here are some tips out of the manual:

Sparkplug: BR9EV ( This is the NGK FINE-WIRE plug, important for use in older sleds)
Sparkplug Gap: 0.024 in.
Fuel/Oil Ratio: 20:1

Also, this site contains helpful information on your sled: http://www.isd.net/ecurtis/kawimain.htm

Let me know if you get it running good! Arcticatman