08/08/2026
FORK SPRINGS…DOES STRAIGHT MATTER?
These fork springs, we found to be not perfectly straight. A good friend of ours Jacob Black had several crashes with his Kawasaki ZX4 and could not pinpoint the problem.
We found a few issues with his forks that had an effect on damping, but Andrew, our lead Tech also noticed these springs had been damaged from a previous big crash and weren’t perfectly straight.
An imperfect fork spring will deflect sideways during compression in the minimal room between the spring guide on the inside of the spring and the inner tube inner wall on the outside of the spring. This was causing an increase in friction to the point of binding and resisting fork travel.
When the motion of the fork is not linear and steps up in resistance unexpectedly, the tire will often begin to slide. A sliding front tire is not something every rider is comfortable controlling, especially when it is unpredictable. That’s exactly why things like fork parallelity along the axle, alignment in the triple clamps, oil level, and damping are all so so important.
If you have a motorcycle handling issue you can’t figure out, give us a shout.