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A '79 Yamaha XS650 2FO . I have modified the rear to accept the KZ750B LTD M1 twin 18" disc brake hub . At the moment the front is stock with he the exception of the second brake . The rear is modified only by way of spacers to center the disc in the caliper and turning down the drive hub center to accept more common KZ650 #530 sprockets . The disc itself is a Honda CB200C turned down .200" to fit inside the caliper . The bearings in the rear had to be changed to accept the Yamaha axle .

I found a WM4 2.50" 40 hole rim attached to a Sportster hub and a WM3 2.15 19" 36 hole rim from some dirt bike for the front . Both rims are vintage Akront .The angle of the spoke holes is well within limits for adaptation to the Yamaha and Kawasaki hubs . All I have to do is polish replacement hubs and rims and deliver to the Wheelmaster .

The engine is at present a stock bore XS650 with a 277/83 crank . All else other than a stock XS2 left cylinder decompression valve remains either stock Yamaha or modified Yamaha parts .

<blockquote data-quote="kopcicle" data-source="post: 643586" data-attributes="member: 46722">A &#039;79 Yamaha XS650 2FO . I have modified the rear to accept the KZ750B LTD M1 twin 18&quot; disc brake hub . At the moment the front is stock with he the exception of the second brake . The rear is modified only by way of spacers to center the disc in the caliper and turning down the drive hub center to accept more common KZ650 #530 sprockets . The disc itself is a Honda CB200C turned down .200&quot; to fit inside the caliper . The bearings in the rear had to be changed to accept the Yamaha axle .I found a WM4 2.50&quot; 40 hole rim attached to a Sportster hub and a WM3 2.15 19&quot; 36 hole rim from some dirt bike for the front . Both rims are vintage Akront .The angle of the spoke holes is well within limits for adaptation to the Yamaha and Kawasaki hubs . All I have to do is polish replacement hubs and rims and deliver to the Wheelmaster .The engine is at present a stock bore XS650 with a 277/83 crank . All else other than a stock XS2 left cylinder decompression valve remains either stock Yamaha or modified Yamaha parts .</blockquote>

[QUOTE="kopcicle, post: 643586, member: 46722"] A '79 Yamaha XS650 2FO . I have modified the rear to accept the KZ750B LTD M1 twin 18" disc brake hub . At the moment the front is stock with he the exception of the second brake . The rear is modified only by way of spacers to center the disc in the caliper and turning down the drive hub center to accept more common KZ650 #530 sprockets . The disc itself is a Honda CB200C turned down .200" to fit inside the caliper . The bearings in the rear had to be changed to accept the Yamaha axle . I found a WM4 2.50" 40 hole rim attached to a Sportster hub and a WM3 2.15 19" 36 hole rim from some dirt bike for the front . Both rims are vintage Akront .The angle of the spoke holes is well within limits for adaptation to the Yamaha and Kawasaki hubs . All I have to do is polish replacement hubs and rims and deliver to the Wheelmaster . The engine is at present a stock bore XS650 with a 277/83 crank . All else other than a stock XS2 left cylinder decompression valve remains either stock Yamaha or modified Yamaha parts . [/QUOTE]

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