justin_o_guy2 wrote on 03/05/17 at 08:30:34:That's some good looking work.
How Out of Round did you make the hole?
Did you check out a spring from the stock petcock?
I tried to determine ovality of mount hole based upon the pics I saw and then tried to use proportion to a known dimension to determine what had been done before. But, I settled on going .050" out of round but only on the side closest to the "front" of the body. In my little test fixture, it seemed adequate, but that will be determined by the use in the bike, i.e. just how much does it really need to spring back when the engine cools down, then heats up again? I am not sure. However, anything would be better and cause less wear on the cam chain than nothing as the original had!
No I hadn't checked any spring like that. I had wanted to ask Mr. Verslagen what he had used and what length he had cut it, but I felt that I might be stepping on his toes and thought that he might be offended if I asked.
What I did was to go to my local Ace hardware, where they have a pretty huge bin full of springs of all sorts of sizes and shapes and uses. I picked out a handful and then tried each one. It had to be stronger than the main spring, when the plunger is inserted as far as it needs to go on a new cam chain. I settled on one at a certain length. I also had to make sure that it didn't "coil bind" - that is squeeze down to where the coils were closed up.
I don't know much about springs in an engineering way, except for the fact that they have a known spring rate. The spring exerts so much pressure the first inch of travel, then more pressure each subsequent inch.
Also, thanks for the compliment. I am no one special, I just enjoy doing things for myself just to feel good! I think that it makes me take more pride in my bike and I certainly feel more pleasurable as I ride.