Mk111 chain adjusters
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Re: Mkiii chain adjusters
I bought my MK3 new in '75, still have it, Be assured it did not come with any markings on the swing arm. I have , however, done an alignment with string and when I felt all was just right, marked the swing arm and adjuster with a dimple. That's my index mark. It's not from the factory, but it's accurate. I'm guessing a lot of other owners have done this too. Do it your self to check their accuracy.
I bought my MK3 new in '75, still have it, Be assured it did not come with any markings on the swing arm. I have , however, done an alignment with string and when I felt all was just right, marked the swing arm and adjuster with a dimple. That's my index mark. It's not from the factory, but it's accurate. I'm guessing a lot of other owners have done this too. Do it your self to check their accuracy.
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Re: Mkiii chain adjusters
Whenever I adjust the chain tension on my bike, I usually adjust the drive side first and count the number of turns on the spanner, then I adjust the other side the same number of turns. As I've usually previously aligned the wheels using a string line, thus the alignment is theoretically maintained. I recently noticed that the adjusters on my swing arm have two different threads, a coarse and a fine - put there by a previous owner of the frame. So now I use a string line every time.
Whenever I adjust the chain tension on my bike, I usually adjust the drive side first and count the number of turns on the spanner, then I adjust the other side the same number of turns. As I've usually previously aligned the wheels using a string line, thus the alignment is theoretically maintained. I recently noticed that the adjusters on my swing arm have two different threads, a coarse and a fine - put there by a previous owner of the frame. So now I use a string line every time.
Re: Mkiii chain adjusters
When making machinery that has jacking screws it is good practice to drill a small dimple as shown by LAB. it acts as a location for the jack screw as force is applied stopping it from wanting to bend or slip out of line. So I would guess thats why they are there which is a nice quality touch fron Norton especially given the sad state the company was in at the time and such small touches that add to costs could easily be overlooked to save money.
When making machinery that has jacking screws it is good practice to drill a small dimple as shown by LAB. it acts as a location for the jack screw as force is applied stopping it from wanting to bend or slip out of line. So I would guess thats why they are there which is a nice quality touch fron Norton especially given the sad state the company was in at the time and such small touches that add to costs could easily be overlooked to save money.
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