like in this Photo, courtesy of Jim Powell: Whats with THAT?
• Well if you want to do it without taking off the Cam Carrier you need to get enough slack in the Chain. i.e. remove the Large Tensioner Bolt. Don’t let the Cylinder in there drop on the floor when you pull the chain. You don’t want score marks on it.. Remove it first and put it on a nice soft cloth where it won’t roll onto concrete etc. ALSO remove the FRONT Cam Chain Guide, (The long Black Plastic Things front of the Chain) it’ll give you bit more slack. The front one just pulls out, pull it gently, when you reinsert it later keep the bottom end against the front (metal) face of the Cam Chain Chamber and it’ll pop back in the slot. The rear cam chain guide rail has a bolt stuck through it at the bottom and will NOT pull out. If you don’t have enough slack by removing the tensioner bolt and the front tensioner rail, just pull the cam carrier blocks like when you change shims. Make SURE the TDC bolt is in place so you don’t go out (Timing-wise) to the Cam Chain Drive at the Crank end.