baker transmissions and champion trike both make reverse gear sets for hardleys. they are extensive takedown and rebuild kits for hardley transmissions and use/require the motor and clutch to do reverse work. its a fair piece cumbersome and wrought with all kinds of potential problems including nuetral interlocks. Champions version is notorious for hosing a tranny if you put it in 1st gear w/o disengaging Reverse.
Hardleys have em cuz they are subject to trike work for muey many years. the Yaps(j) cept for the Leadwing, are newcomers to the trike world. 'Lectric reverse seems to be the more better way to get er dun.
If yor looking for ideas as to HOW they accomplish that, do some research in the world of trikes and you will uncover all kinds of bizarro methods. somes are ok, somes are ? Wether those methods can be ported over to a skoot is probly why they haven't... and there isn't much demand/market for it.? ponch out
not another boring list of mods;
14 guzzi v14, 14 Injun chieftain v18, 13 guzzi v7, 12 hardley 48
07 kaw v2k, 07 guzzi v11, 07 yam v17, 07 96ci 'lectraglide
06 88ci superglide, 05 hardley 883, 05 yam v17
04 zooki sv1k, 03 guzzi v11, 02 kaw v15
01 Honda 750, 00 hardley 883, 84 Honda v7 supermagna, 99 hardley 883
92 zooki v8 sport, 88 zooki 650 thumper, 84 Honda 500 thumper
80 Honda 360t, 78 Honda cb500f, 75 Honda cb750f
73 Honda cb500f, 73 Yam TX750 blow up bike, 72 Honda cb350t