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I week ago Saturday I finished flushing the brakes again. (thanks JohnZ for the writeup)
Did a valve check, pulled cams, swapped buckets around. Ended up buying six new ones. Put back together, torqued, final check, everything good. Went for a 115 mile ride, and during ran it through the gears a few times with RPM's up around 7300. Ran great, maybe even better than when I got it four years ago. Sunday. Wife's first ride of the year, we take off and get about five miles from the house, running about 65, when all of a sudden it was like all the valves fluttered and the engine died. It won't restart and sounds totally different than it ever has. Called nephew who has trailer & we get it back home. I finally get around to checking it today hoping for the best. Oh, I forgot to mention that on the final torque of the exhaust cam it slipped, just like a previous post from NCrider. I go get a new bolt that is 10mm longer and put in there and it torqued and held.
Upon taking the valve cover off everything looks good until I put it in gear and start rotating the motor. Evidently the keyway (pin) on the exhaust sprocket is sheared, as the sprocket turns, but the exhaust cam doesn't. Is that pin replaceable on the sprocket, or does it take a new sprocket. Where do I go from here? And what would you say I did wrong in the first place to cause this. I'm thinking that maybe I didn't get that pin properly seated on the cam before torquing it down, but it sure ran great for one day.
Did a valve check, pulled cams, swapped buckets around. Ended up buying six new ones. Put back together, torqued, final check, everything good. Went for a 115 mile ride, and during ran it through the gears a few times with RPM's up around 7300. Ran great, maybe even better than when I got it four years ago. Sunday. Wife's first ride of the year, we take off and get about five miles from the house, running about 65, when all of a sudden it was like all the valves fluttered and the engine died. It won't restart and sounds totally different than it ever has. Called nephew who has trailer & we get it back home. I finally get around to checking it today hoping for the best. Oh, I forgot to mention that on the final torque of the exhaust cam it slipped, just like a previous post from NCrider. I go get a new bolt that is 10mm longer and put in there and it torqued and held.
Upon taking the valve cover off everything looks good until I put it in gear and start rotating the motor. Evidently the keyway (pin) on the exhaust sprocket is sheared, as the sprocket turns, but the exhaust cam doesn't. Is that pin replaceable on the sprocket, or does it take a new sprocket. Where do I go from here? And what would you say I did wrong in the first place to cause this. I'm thinking that maybe I didn't get that pin properly seated on the cam before torquing it down, but it sure ran great for one day.