These are "RT Only" installations. They require extensive machining and a modification to the top-out spring.
This piston ring is made of solid steel. This design does not fill the rebound chamber very well. Also, in stock form the top-out spring is press-fit onto a straight portion of the damping rod. It is common for these to wear and come loose.
The damping rod must be machined to accept newer style Husky Piston Rings. The machining also opens up the ID to allow less flow restriction. The machining also modifies the rod for a better top-out spring retention design.
The 1972 is a bit different. The stock 1972 "piston ring" is much wider (see pic) and has a check valve in the bottom of the chrome tube. It requires a different mod. Click here for details.
Click on the image on the left to open the .pdf for specific machining instructions. This doc explains what to do to 1973 and 1974 models. The only major difference between 1973 and 74 is the steel tube at the bottom of the damping rod on the 74.
This mod will allow the use of FPPR HQ35 piston rings that are made to fit 1975 and newer Huskys.
Be sure to bore the ID.
ENLARGE THE COMPRESSION FEED
Drill the two existing large compression damping holes to 6mm (1/4") and add 2 more sets of holes (6 holes total) at 10mm increments above the stock holes. Each set must be at 90 degrees to the last set.
To provide the best experiences, we use technologies like cookies to store and/or access device information. Consenting to these technologies will allow us to process data such as browsing behavior or unique IDs on this site. Not consenting or withdrawing consent, may adversely affect certain features and functions.
The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
The technical storage or access that is used exclusively for statistical purposes.The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.