left hand side is the home made one, to me the holes are very slightly off centre and look drilled/machined. The holes on the right hand one look like they have been punched, and the rounded ends on the right hand one also look more like being cut/stamped whereas left hand one looks rounded off by file/grinder. Good job!
It's a trick question cos he probably worked for Kawasaki back in '72 as a grab handle maker for H2's, nicked one and paid a couple of yen for the other.
The one on the right looks like the holes have been dished where it's been fitted to a bike, the other doesn't look like it's ever been bolted up. Either way, you did an excellent job!
some of you are right and others wrong
the one on the left is mine
it is a lift grab rail to ease putting the bike on it centre stand.
heres picture of the grab rail for the rare H2b,c
There was a completely unrestored still immaculate one in my friend's shop last year, he had a 250 triple in as well. There seems to be a good following for old 2 strokes in decent nick. Left one still looks genuine to me but they both look excellent quality.
There not called grab rails as in to 'grab hold when your riding pillion' there to grab onto when your putting it in the stand.
When your on the back you wrap your arms around the riders waist and hold on tight lol.
I never rode an H1 or H2, but had an RD400F. I had a soft spot for big 2 stroke enduro bikes though. I had a PE400, my brother had an IT465 - almost too much fun to ride.
I like the quality with which you're restoring your bike. Bikes like that are rare mainly due to their hideous handling and wicked powerbands. Even the ubiquitous RD350LC is a rare bike now. I've also found that old vans are similar - people never consider them worth keeping on the road, so you seldom see a MkI transit for example. I have a Commer PB2500 which is getting it's MOT today. Much fun to drive and a rare vehicle, although once upon a time every second van was a Commer.
Incidentally, how do you press the end of the tube so neatly? It's a tidy way to bolt a tubular object down and I can see myself needing to do that at some stage.