Faulkner... they do springs to fit anything.. and a great price 
http://www.dfaulknersprings.com/
progressive ones are best
http://www.dfaulknersprings.com/
progressive ones are best
Sorry to disappoint, but K-tech and MCT only recommend linear rate springs.Faulkner... they do springs to fit anything.. and a great price
http://www.dfaulknersprings.com/
progressive ones are best
Internal friction points will wear and become smoother. A brand new bore will still be covered in honing marks over which the piston rings have to slide. Gear teeth won't mesh and slide apart as they turn as smoothly as when they have worn a bit. Modern engines however are manufactured to much finer tolerances than engines of yore. Even in the early 70's you risked seizing a new engine if you got it too hot before it was run in. The 600 mile oil change is about dropping the initial oil out which is full of microscopic metal particles front the relatively rough components after machining. I've no idea how a car can come out of the factory and not get an oil change until 18000 miles later.
Sorry to disappoint, but K-tech and MCT only recommend linear rate springs.
Getting springs appropriate for your weight/load and riding style makes a vast improvement.
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