I need to find a downloadable service manual for a 1986 Yamaha Moto 4 ATV.?

I have searched online and all I can come up with are websites that want you to buy the manual. I just want to download or view a manual to fix a problem of there being no spark.|||Highly doubtful you will find one. They are dealer only items and anything else you find out there is probably bootleg. Ebay is full of them for cheap.