Yep Its a Suzuki K125, The white one is an earlier model, A K125 M1.
The black one is a K125 M2.
There is also a M3 & M4, the last model made.
I have restored a M2, I believe it to be a 1973 model.
The air filter is within the frame, between the battery box and the oil box and sucks air through to the carb.
I have restored a m2 to a pretty decent (I think) looking bike.
There are more pics in my 'Hello' thread but as im new to the site I think a mod needs to check over my first thread?
Cheers
Attached files