Doing the xb9 primary gear swap into the xb12 and my primary chain form my xb9 is to short and the primary chain from the xb12 seems to long[confused] the xb9 primary gear and chain are from a 2003 xb9r and going into a 2005 xb12r motor, is my 03 chain not compateable with the 05 clutch/tranny sprocket or will the chain tensioner take the slack out[confused] So badly want to get the bike running, thanks in advance