the filler cap is off a yam tzr 125. i cut the top out of the yam tank and had it welder into the gpz tank (on the piss) as a few of the club members pointed out. mr doran is the man to speak to about how many bikes to own i have ran out of space but would have more if i could afford them and had more space. why work on one when you can work on four (you are never stuck waiting for a part)