The old Honda Odyssey used the same bolt pattern (3x100). Another member and I went in on a pair of new ones that were being ebayed, he sold his yami and mine is still in the shed. The stock Odyssey uses a 5x8 rim but the aftermarket one is 5x10. The holes will need to be drilled out slightly and a spacer with new studs will need to be used as the rim is offset.
Looks like the seller has another set.... http://cgi.ebay.com/ebaymotors/10-di...spagenameZWDVW
You can probably swap out the front hub/rim from the Tri-Z, I have seen a picture of a YT with a 200x front hub/rim but don't know if there is mod work needed.
1984 Yamaha YT 60 Tri Zinger(current project)
1983 Yamaha YTM 200 (rear suspension kit)..... long term project
2004 BMW R1150R
1972 Honda CT 70
2007 Lifan 110