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Notes:I ran into a situation that caught me off guard with the JS2 cam.Not being up on the latest greatest Norton aftermarket performance parts I did not realize that many (all?) aftermarket cams are threaded on the timing side for a 1/4-28 bolt to secure a points AAU or a stator for modern ignition. I screwed the old Norton cam lip seal protector thingie I have into it and it started out fine, but got real difficult to turn eventually. I took it out and knew something had to be wrong. I tried a 1/4-28 bolt in there and it would not go either. I jammed up the threads about half way in. So I contacted Jim and asked what the thread is supposed to be. Once I got the right information about what the thread was supposed to be, I ran a tap in all the way in and was able to use a 1/4-28 bolt without any problems. Point is if you get any resistance at all trying to use an old Norton bolt in the timing end of any cam, that cam is probably threaded for a 1/4-28 bolt.Just passing it along in case somebody is swapping out an old Norton cam with a newer aftermarket cam and doesn't instinctively know the threads for the AAU on the timing end are 1/4-28.
Notes:
I ran into a situation that caught me off guard with the JS2 cam.
Not being up on the latest greatest Norton aftermarket performance parts I did not realize that many (all?) aftermarket cams are threaded on the timing side for a 1/4-28 bolt to secure a points AAU or a stator for modern ignition. I screwed the old Norton cam lip seal protector thingie I have into it and it started out fine, but got real difficult to turn eventually. I took it out and knew something had to be wrong. I tried a 1/4-28 bolt in there and it would not go either. I jammed up the threads about half way in. So I contacted Jim and asked what the thread is supposed to be. Once I got the right information about what the thread was supposed to be, I ran a tap in all the way in and was able to use a 1/4-28 bolt without any problems. Point is if you get any resistance at all trying to use an old Norton bolt in the timing end of any cam, that cam is probably threaded for a 1/4-28 bolt.
Just passing it along in case somebody is swapping out an old Norton cam with a newer aftermarket cam and doesn't instinctively know the threads for the AAU on the timing end are 1/4-28.
