I've got a 97 900rr that i had the head ported and decked.. I've got some adjustable cam gears to make up the difference for the extra chain slack, and I was wondering if any one had some good specs for in and ex cam open and closing degree.. any info, or a place i could find some would be great..
If the cams are stock '97's set them up to the specs in the manual.
You don't usually need to adjust cam timing just from milling the head - a worn chain will put the timing out further.
You can remove any chain slack simply by fitting a new chain.
I took 0.55mm off my GSXR750 and 1mm off one of my cars with no cam timing adjustment. How much was taken off yours?
"Decking" nowadays seems to just mean machining it flat again so it's probably just 0.10mm or so.
For '96-98 stock appears to be (all at 1mm lift):
IN opens at 15 BTDC and closes at 35 ABDC.
EX opens at 39 BBDC and closes at 11 ATDC.
Unless it's a late Cali model which has different cam specs.
IN opens at 0B TDC and closes at 37 ABDC.
EX opens at 40 BBDC and closes at 0 ATDC.
cbr900racer77 is probably the best guy to talk to but I'd be surprised if he runs stock cams.
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