Re: replacing cct on a cbr954rr?
i was able to get a small open end wrench on the top bolt after loosening the rubber boots on the throttle bodies, popping them off and gently moving them to the side while i worked.
technically, to set it correctly you need to remove the valve cover to measure cam chain deflection between the cam gears. most just use the feeler method of turning the set screw on the ape unit until they feel it make contact with the cam chain, back it off a tiny bit, n set the set screw.
start the bike and give it a listen. and adjust. you can typically feel the cam chain while you hold the ape's adjustment screw. you can loosen it just until you hear it starting to rattle then as you tighten it you can feel the chain kind of slapping on the screw. as it gets tighter the noise will stop and you can feel the chain smooth out and stop slapping. for whatever reason on the 954 this feeling was difficult to gauge. maybe its because your arm is elbow deep in a hole that maybe a 12 year old girl could fit her arm into, but mine was completely crammed into while adjusting.
here is the biggest problem on the 954. its a real pita to install, but adjusting it is difficult. the only way is shove your hand way up in between the frame and the engine and struggle to get a wrench on the set screw to loosen it. thats a battle by its self. then to adjust it, again youre arm deep on the left side of the bike where you cant really hear it very well. so you gotta adjust, fight with the wrench to tighten the set screw and hope you have it good when you walk around the other side n give it a good listen. if not repeat. its frustrating.
the next hurdle is these are performance parts more meant for race bikes. sure its a better option that the auto cct that will eventually fail. but... the ape cct need to be adjusted on a somewhat regular basis. it needs to be checked more often than not to be sure the set screw hasnt backed off. if it does it could be a real problem. maybe your cam chain will just skip a tooth but maybe it skips 5 and wrecks the valves as the pistons slam into the now incorrectly timed engine. my point is it needs a diligent eye on it. unfortunately its near impossible to see clearly. to see it at least requires removing the fairing.
personally, the fact it was stupid hard to adjust on this particular bike, not feeling good not checking its set screw visually every other time i rode because i wasnt taking my fairing off that often, left me to switching back to the auto cct. yes the ape is a better design. ive used them exclusively on most bikes ive owned. but on this bike its just too much to get at it. it was always in the back of my mind.. did i have it adjusted correctly or did i just get sick of f@cking with it n say "good enough"...was the set screw holding?... it never left my mind. other bikes it was easy to see and adjust i had no issue feeling confident in its function.
just my 2 cent.