Joondy

Hi there I hope some one may be able to help. I have just acquired what appears to be a late 60's early 70's single (maybe 100cc) it has the VIN H3- 305 405. I have spent a number of days searching the net to identify the bike. So Far no luck. I have tried http://cyclerestorer...facturer=Yamaha but the number is not there and the other sites I have found don't do the old 8 digit numbers. Any help would be greatly appreciated. Alex