OK my next hair pulling, wall punching, bicycle throwing (donít ask) issue is this:
When I was done removing the u-shaped washer thing from the sprocket, i forgot to take the sprocket off, and mark the position of the sprocket and chain, like my buddy told me, and when i went to loosen the head bolts, i nudged the sprocket with my hand, and it fell off the cam shaft, it was the front end by the way. The chain is still good on the bottom "sprocket" it hasnít moved off the teeth.
Since Iím changing the sprockets, cam shafts, chain, tensioner assembly, and guides, is this going to be a huge issue, as far as timing is concerned? I know where the cam shafts are sitting and i know how the sprocket is supposed to fit on to the cam shaft.
Or am I fcuked?
If i need to elaborate then please let me know. Iíll tell you what i can.
Not having had one of these timing chain/cam sprocket assemblies apart on these bikes, and not knowing how the sprocket is located to the cam, I can only suggest that you totally understand and follow the timing procedure in the manual to the letter when you reassemble the engine. make sure that each cylinder piston is in the correct position when you put things together!!
As to your original Question, the stretch of the chain refered to is really wear in the pins and bushings that hold the chain links together. Only two reasons for that come readily to mind.... excessive tension and lack of lubrication. A third would be excessive mileage but that doesn't seem to be the case in most of these happenings.
The one thing that I know I avoid altogether on these engines with timing chains is rotating the engine BACKWARDS. Turning the engine backwards tensions the chain on the opposit side to where normal tension exists and it is likely that the misplaced tension does damage to the tensioner and over tensions the chain causing problems or something similiar.
This is just my idea on this but if you over shoot the timing mark when positioning the cylinder for setting the valves, just keep rotating the engine two more turns and don't let it slip past....
Some hints to prevent slipping past the timeing marks.... remove both spark plugs and fill the plug cavity with paper shop towel to keep falling bolts, nuts and washers from getting in the cylinder and use a swing handle on the socket instead of a ratchet so you have more control of engine position.
06 C50C (Special Edition)
lowered 2" --- Metzler 880 www's
OEM lightbar --- Cobra EG --- Sagebrush chaps
DJ drive --- mustang 3 piece seat --- CW Tach
Vista Cruise --- 4X1.5 pullback risers
CYFHMN member ---