Installed a mct on my 16 690. I followed the directions and took all the side movement out of the cam chain( while doing valve adjustment). When I started it i noticed a whirring sound which according to the directions is too tight so I loosened it.... and loosened it.... trying to get a little rattle and never did. After backing it out 1/2" I never got any rattle. Im scared to keep backing it out because I dont wont it too loose. I can turn the adjuster easily in or out by hand so it has me concerned about keeping it in. Any tips on adjusting it?