Three-step check for ba­sic forks

Practical Sportsbikes (UK) - - On Your Bench -

1. As­sume the damper rod re­tain­ing bolt is cor­roded in place. Ap­ply gen­er­ous amounts of pen­e­trat­ing oil or heat if re­quired be­fore at­tempt­ing to crack the seal. A snapped bolt is a whole lot harder to re­move.

2. In­spect the plas­tic pis­ton ring on the bot­tom of the damper rod. They can go brit­tle with age, crack and cause de­bris to slosh about in­side the fork. If it looks to have seen bet­ter days, re­place.

3. Have a good look at the top plug. It may have no longer been sit­ting in oil, and can cor­rode as a re­sult, like this one from the TS. Dress with emery paper to re­move any dam­age or high-spots and re­place the seal. Job’s a good ’un.

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