Having a bit of a mechanical drama atm though with the front sprocket i bought. Some of the teeth are 3.5mm wide at the tip and some are just over 1mm at the tip. O.D is the same but it seems this difference in tooth width is causing the chain to go tight in some spots as the rear wheel is turned. Similar to a stretched chain (chain is new). Am i right i thinking the sprocket is the cause? or could i have a bent output shaft or something?