I think we all can agree that the whole point of the riser plate is to install a TAV on a Coleman mini bike, correct?. If you don't want to cut the hoop off the frame, the engine has to be raised and shifted forward approximately 1-1/2". What wasn't taken into consideration was, is the front sprocket going to be in the same location as the original after installing the TAV, the answer is NO!. For those who think I'm the only one with the alignment issue, here's some pictures of a stock setup and after the TAV is installed. Measuring from the back of the backing plate to the center of the sprocket on each setup, the front sprocket on the TAV is 3/8" of an inch further to the right. I use the back of the backing plate because with the engine in the same location (left/right) the back of the backing plate will also be in the same location (a known constant). The only variable is the front sprocket. There's no way one could shim the sprocket 3/8" more and still have enough room on the driven pulley shaft. The best way to design the riser plate would have been to make a jig keeping the front sprocket in it's original location, then install the TAV so the front sprocket is in the same location then measuring where the engine has to be located from there, not just lift and shift forward. Or do like I did, align the rear sprocket 90° perpendicular to the back of the original engine plate using a laser crosshair. This way the rear axle is in perfect alignment with the drive unit, then install the TAV on the engine and adjust it left/right until the front sprocket is centered with the rear sprocket.
View attachment 279774
View attachment 279775
View attachment 279774
View attachment 279775