Check out the great TY80 action shots  with Brutus and the boys on these threads.
http://www.advrider.com/forums/showthread.php?t=574301

http://advrider.com/forums/showpost.php?p=21141891&postcount=423

Useful parts sites.
http://www.bikebandit.com/houseofmotorcycles/yamaha-motorcycle-ty80a-1974/o/m7797

http://www.yamaha-motor.com/sport/parts/home.aspx

http://www.boats.net/parts/search/Yamaha/Motorcycle/1974/TY80A/parts.html

Fantastic Video from the team at Yamahaty.com

http://www.dailymotion.com/video/xhrw9n_video-site-2_auto"

Make sure you follow Dave's TY80 restoration pages using the below link. Dave has already completed a TY250 Resto and if his TY80 turns out as good as that it will be a real headturner.

http://www.trials.com.au/forum/viewtopic.php?f=16&t=7519

General Interest - Check out my friend Ray Murray's Photography site

http://www.photoimagesaustralia.weebly.com