It has a panhead engine so it is no later than 1965. Maybe a customised Duo-Glide?
I have looked through a few Harley pics and as we all know 1958 was the first year with rear suspension - making the Hydra Glide into a Duo Glide - and the chrome tool box seems to be gone from 1960 onwards. I think if this was called a 1958 Harley-Davidson Duo Glide you won't be far wrong.
KTM from 80's possibly a GS 250 http://enduro80s.free.fr/BRT_-_VINTAGE/mb-240-ktm1.jpg Link to "www.enduristianonimi.it"
The bike is a 1989 KTM 250 EXC http://www.bikepics.com/pictures/033018/ The stunt in Paperitähti was performed by Arto Nyqvist at the Ruskeasanta MX track.
Not a custom bike but a standard 1987 Suzuki LS 400 Savage. http://www.motorcyclespecs.co.za/model/suzu/suzuki_ls400_savage%2087.htm Are you sure it's 400? I remember all the Finn Savages being 650cc.
You may be right. The pics of both the 400 and 650 look as if they could be the same bike from a different angle. I have never seen a 400 here in NZ. If you are sure there were no 400s in Fi then I will agree with 650. I think 1987 was the first year for these.
Harley-Davidson FXSTS Softail Springer probably new in 1989 as the springer front end only became available about then. The link is to a 1999 bike. http://www.motorcyclespecs.co.za/model/h-d/harley_davidson_fxstS_sof%2000.htm
WW2-era Harley-Davidson WLA.
would like to know what happened to that motorcycle and is it for sale