While I'm swamped with work & stuck on progress with the Simplex sidecar design; I thought it a good time to start a new bike build....?? I've been sorting through my left over parts for several weeks now and have much of what I need to base a board track type, 2 cycle powered bike around. At the same time I searched for a donor Schwinn straight bar frame, but failed to find one I liked at my price point, so I ordered an aluminum version and hoped for the best and waited. It arrived yesterday and I'm pleased with the quality. The fuel tank I'd picked up a few months back from a "bike builder" who became overwhelmed with the cost & difficulty of assembling what I'd describe as a very basic box store "kit bike". His pain my gain, 'cause the stainless tank coffin style tank actually pressure tested and fits the aluminum frame. I sorta expect the X Autocycle to be almost a "kit" build as well when compared to my last two, the Simplex Copper Gator and Harley Peashooter, but I'll tweak a few things I'm sure. The motor is a Gt 5 Grubee that I built some time back for a future project and I guess this is it. Nothing really radical balanced & trued the crank. Ported the transfers and cut a third transfer port in the jug to match the piston window. Slightly enlarged, polished & matched the intake and exhaust ports and surfaced the jug deck. I selected a 6 cc aftermarket head and copper gasket, more for cooling than added power & a RSE reed kit coupled to a SHA Dellorto clone carb. I also replaced all the bolts with high grade socket head bolts and studs.I put about 10 hours of riding time into this motor and it's pretty sweet. It's one of three GT 5 motors that I've built in exactly the same way, one of which is mounted on my Skyhawk frame & is getting close to 500 hrs of riding time. These motors are quite thirsty and on the small capacity Grubee tank bear topping off frequently, but are sporty. Though I don't run an expansion pipe currently a good pipe really brings the mods to life. I run a 48 tooth in town riding and pull from a dead stop without pedaling. Have a few photos on my phone that I'll share later. Rick C.