HOW TO: SET UP A SHOCK FOR SAG

Fit­ting a new shock is only half the job, the link­ages need ser­vic­ing, static and loaded sag need set­ting

Practical Sportsbikes (UK) - - Contents - Words and pic­tures: Alan See­ley

Alan’s CRM gets the treat­ment

Anew shock ab­sorber af­fords the per­fect op­por­tu­nity for a lit­tle back-end re­me­dial work as well as some sus­pen­sion set-up. Our 1989 Honda CRM250’S shock fi­nally gave up what­ever lit­tle life was left in it on the Taffy Dakar at the start of the sum­mer (PS July 2018). Talk­ing to our friends at Nitron, they had no fit­ment listed for the CRM but were keen to get one on their books. We sent them the old shock for some points of ref­er­ence. A few weeks later and a pris­tine new unit turned up. It’s the pop­u­lar en­try-level Nitron NTR R1 with a 40mm

pis­ton and preload and com­bined damp­ing ad­just­ment, tai­lored for the CRM and me. We’ve got th­ese in a cou­ple of the PS fleet now and they al­ways de­liver the goods. When fit­ting a new shock it’s a good time to clean up link­ages and set the rear static sag; the dif­fer­ence in height be­tween the bike loaded, at rest, and fully un­loaded.

Our shock was al­ready out and the bike has been sat on a stand for a month or more. If you’re start­ing from scratch you’ll need to get the bike off the floor, ei­ther with a stand un­der the en­gine or an Abba stand that bears on the swingarm pivot. And bit of wood un­der the rear tyre is use­ful too.

76

About the only thing that’s not red on Alan’s silly too-red bike

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