RFY Shocks Technical Library

with 2 Comments



Diagram showing the role of a damper within sprung and unsprung mass.
Diagram showing the role of a damper within sprung and unsprung mass.

Over the last 9 months of working with RFY shocks I have encountered numerous questions, concerns, comments, and inquires. Additionally, I have produced a significant base of information by which those of you out in internet land can use to better educate yourself before purchasing or using RFY shocks. To further this quest, and place the information I have produced into a more usable and accessible format, I have created an RFY Shocks Technical Library.

In this library I will add links to the various pages, posts, RFY technical reviews, etc. In addition to the tech articles I have also created a FAQ (frequently asked questions) section. It is my hope that the FAQ page will simplify the question answer process that I typically get via email or post comments.

You can find the new technical library and the FAQ under the bikes navigation that is at the top of every page!

2 Responses

  1. Paul G. Bade
    | Reply

    Hi Chris, I don’t know if this is where I should ask a question, but here it goes. I have a pair of 340mm RFY with what I think are 8mm progressive springs(have rubberized coating) I am probably going to have you rebuild them for me. They are going on the front of a small app 700lb buggy including me. With 90lbs psi, they seem like they’ll be OK, as far as spring rate with a .5 inch preload adjustment, the way they are set up now. About the limit spring, I would love to get more stroke as I am just under 9 inch total travel now with the motion ratio etc. However the unsprung front weight is 35lbs each side. My question is, if I have the spring replaced will it be strong enough as to not destroy the shock without using limit straps? Thanks for your services.

    • Chris
      | Reply

      Hi Paul,

      I have had very good luck with the top out spring that I use. It is not as stiff as the normal spring though, so it does reduce the distance between the piston and the bushing and could increase wear on the piston or shock tube bore. I haven’t seen this in practice though, but this is with vintage motorcycles that don’t often get their wheels off the ground. It could be more of a concern with your buggy, where I anticipate that you do likely lift wheels at least occasionally. If you want to gain some length without using a shorter top out spring I can gain some length at the jam nut while keeping overall length the same by machining the lower perch. And in fact I do this often on some my kits and it has proven to be a good modification. Though the gains are small, on the order of 5mm or so, it can be a meaningful change at the wheel thanks to the motion ration.

      Thanks for posting! You can email me at chris.l@chrislivengood.net if you have further questions.

      Best Regards,

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