Re: How to Degree your Cams
As promised here is the "report" from first test ride after cam degreeing. Breif intro for those who didnt follow whole thread. Bike (ER5, detuned EX500 engine) with 70000 km started to ran rougher and with less pull when accelerating. Did usual stuff, valves, carbs, plug wires, etc. Since I havent replaced camchain yet, it seemed reasonable to assume that symptoms were product of (over)stretched camchain. Ok, did cam degreeing as described by FOG. Doing it for the first time without proper tools took longer then I anticipated. Intake cam was at 103,5 degrees when it should have been at 100. I elongated holes on cam sprocket 3mm in each direction, then adjusted sprocket and remeasured degrees. Couldnt get lower than 102, so its still not optimal, but 1,5 degree better than "original".
In a month or two I ll take intake cam sprocket off, elongate that hole a little more (another 3mm, now I know in which direction), then put everything back (I wont take engine off this time so I wont know new degree position, but I guess it will be 1-2 degrees lower, so 100 or 101, better than now).
As for the effect. On first test ride bike ran smoother, accelleration was better and the engine was more willing to rev, so it was improvement. I ll still do some more test riding and if after cca 300 km everything is ok, then I ll call it success. Well, it wasnt waste of time, far from it, FOG thanks for your thread on cam degreeing, as a "first timer" I would recommend this procedure to anyone who has enough time/tools/inclination to do it.