Pick yourself up some 300ex,250x,400ex, or 350x rims and then pick up some 250x, 86 200x, or 300ex rear hubs. I believe the 400s may work to but youd have to talk to some one about it. With the rims and hubs you will gain a good 6 or 7 inchs. I dont like wheelspacers because they add weight to the rear end and put more stress on the axle and hubs then just adding new rims and hubs I believe.
3WheelsForever / Virgil
TrikeFest 03, 04, 05, 06, 07
1985 Honda ATC350X - TF2015 Project
YZ426 Hybrid Trike - On the back burner