I picked up a CT70 that "wouldn't kickstart" and ended up splitting the cases to find a few broken gears on the transmission. I had a few different 3 speed transmissions from a Z50 in a box and was able to find the right gears to replace the broken ones. When i assemble everything per my clymer manual (yes i have made sure the washers are in the right places) I am able to spin the countershaft freely in neutral and then shift through all the gears and everything seems to spin good. Then I install the kickstarter shaft and thrust washer. I test by turning the kickstart shaft clockwise to simulate the ratchet spring and again, everything spins properly through neutral and all gears. After I install the right side case half and kickstart ratchet spring and retainer i can turn the shaft in neutral but when i move the shift drum through each of the gears something is binding slightly. I can "get passed" it if i turn a little harder and then it turns maybe another full rotation or two and then binds again. Any advice of what to look for? I've already fully assembled the motor once and it ran great but when i went to shift to first the gears grinded pretty bad. I want to make sure i've got this thing right before putting all the way back together. 
Thanks!
Thanks!