Marshall’s Racing L.L.C. 924 S Mound Stillwater Ok 74074 405-
Thank you for choosing Marshall’s for your suspension need,s We take pride in our work and want you the customer to enjoy your own personalized revalved suspension., with our knowledge and experience in the racing field you should enjoy your new set-
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Proper installation of your suspension components can drastically affect the handling of your motorcycle, when installing the forks always be sure the tubes are clean of all oils and grease. Set the fork tubes to the recommended height per your pamphlet and always torque the triple clamp bolts to specified spec.( usually between 14-
When installing the rear shock always grease your shock bolts as well as checking all linkage bolts for proper torque and installation. (Always check linkage for proper lubrication and smooth action.) With shock in the chassis preload the rear wheel by lifting up on it. Now tighten all your shock and linkage bolts to specified torque specs. After installation of fork and shock be sure to check your race sag (ride height) as well as free sag.
Remember your race sag is a really important factor in the handling of your machine.
Recommended Race Sags
65 cc machines: 65-
Remember these are only recommended race sags, always refer to owners manual or Marshall’s racing pamphlet for preferred race sag.
To increase race sag (lower rear of bike) turn spring counter clockwise.
To decrease sag (raise rear of bike) turn spring clockwise.
Meauserment A: With bike on a stand and the rear wheel unweighted, measure from a point on the rear fender to the centre of the axle (try to keep it at a 90 degree angle from the ground).
Record this measurement. Example: 620 m.m.
Measurement B: With gear on and motorcycle off the stand sit in a neutral position on the bike, usually your butt inline with the foot pegs.
Now record this measurement. Example: 515 m.m.
Now subtract measurement B from measurement A, this will give you your race sag. Example: 620-
Measurement C: This is your free sag measurement, with no rider and bike of the stand push up and down a few times on the rear of bike. Take measurement front same point on fender as in A to the rear axle again, record this measurement. This will give you your free sag. Example: 620 mm. -
Preferred free sag is 20-
With desired race sag your free sag should be between 20-
Less than 20 mm free sag requires a stiffer rear shock spring. More than 40 mm requires a lighter rear shock spring.
Feel free to contact us anytime if your having any difficulties with your suspension, our friendly support staff is always willing to assist you with all your racing related questions. Click on troubleshooting link below or contact us at.