Actually, not to start a fight but I have a service manual, for what it is worth. stock number is LIT-11616-FZ-61. In section, page 4-54 there is a NOTE: Install the spring with the smaller pitch facing up. Then there is a diagram so everybody understand what pitch refers to. On page 4-50, step 2 is measure the spring free length. That free length is 354mm (13.94 inches) to 347mm (13.66 inches).
I think you for your opinion but I believe I will follow the instructions from the people that built the bike and spend millions if not billions on R & D. How many hundreds of Engineers does Yamaha employee? Thousands?
Sag is important for an individual rider that is seeking to fine tune their performance envelope. The Factory just wants Owners to be safe.
I'll go with the factory. The spacers are for minor adjustments. I don't consider 10% to be minor. The Free Length range is 7mm. That would be what the Factory considers minor and to be adjusted for.
BTW, my Race Tech Springs were not branded.
I don't know what springs they are, as I wrote. My logic was that the factory DID NOT put themm in up side down. So logically, somebody else did. Why would somebody replace stock springs with stock springs? Springs don't wear out. Not on a properly designed motorcycle. The fork OIL was pretty new. Certainly not almost 10 years old like the bike is (it's an '05). So the fork had been worked on. I paid the shop 50$ per to do the forks. Seals, bushings, blow out the damper. I asked the Mechanic if it looked like it had been worked on. He said yes, so there was my second opinion. The most logical reason to work on forks is to change the springs, or do the damper valve. Anyone doing the valve would know enough to understand there are very sound engineering reasons why the pitch gets smaller at the top. Reasons based on the laws of physics.
You do understand that RaceTech sells springs. They don't make them;
IndustryNet
Not sure about Hyper Pro. They are European and might not be required to registar with the Government. Economics still applies. A Spring manufacturer Would make millions of springs with the economy of scale that provides. Of those millions, only a few thousand or even few hundred would be for motorcycles. The cost savings of buying raw materials for millions of springs would still be there as well as the lower unit cost of running the lines for an extra little bit to knock out the motorcycle springs after the SUV springs. So they knock out a few and send them to Sport Tech, which checks them. packages them, then ships them to you and I. Nothing wrong with that. It saves everybody money and creats jobs. A win-win.
Out of the Millions of motorcycles ridden worldwide today, how many had the sag set? 1,000, 2,000, Or about .0002 %
Why do you think that number is important? Maybe you are making money off it, in which case it is important. To you. Not to me and the many millions of riders who have no idea what sag is and ride along in safety without knowing or caring.:rockon:
