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R90/6 front fork question
Posted: Wed Jan 12, 2022 8:27 pm
by wbmoore
Hey….I’m rebuilding the front forks on my /6. Does any body KNOW the answer to this three scraper rings (#13) alignment question ?
A Very good builder (by my estimate) says to align the gaps of the 3 scraper rings in a straight line… unlike the oil scraper rings on a piston in an engine, which are staggered.
Are the three rings placed in a straight line to allow oil to flow down the tube ? Or should they be staggered as in an engine ?
Thanks for the input.
Re: R90/6 front fork question
Posted: Wed Jan 12, 2022 9:32 pm
by sblaylock
Interesting question.
Every picture I've seen shows them spaced like piston rings - 1/3rd, 1/3rd, 1/3rd i.e. 120 degrees apart. Whenever I rebuild forks, including the R90/6 I'm doing now, I do the 120 degree spacing. I believe the scraper rings are exactly that, scraper rings. They are not part of the "shocking" system. The dampner rod holes and the "ring", 9 in the diagram, control the compression and rebound... as I understand it.
So, I would say, 120 degrees apart, but I'm always open to insight as to why my understanding is not 100% correct.
Scott.