Marshall’s Racing L.L.C. 924 S Mound Stillwater Ok 74074 405-377-0192

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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-up. We strive in perfection and customer satisfaction at Marshall’s racing. However if you have any questions concerning your suspension feel free to

contact us by e-mail or phone at anytime.

Proper Installation

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 14-16 foot lbs.) Install the wheel and tighten brake side fork lug bolts. Now spin the front wheel a few times and touch and hold the front brake, while holding front brake tighten right side fork lugs. All this insures proper fork alignment prevents any binding of the forks.

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: 65-75 mm

85-105 cc machines: 80-90 mm

125-500 cc machines: 100-115 mm

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: 620-515=105 mm of race sag.

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. - 600 mm = 20 mm of free sag.

Preferred free sag is 20-40 mm depending on riding style and motorcycle. Refer to manual or Marshall’s Racing pamphlet for desired sag.

With desired race sag your free sag should be between 20-40 mm.

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.

Tuning Your One Stop Race Shop Suspension Click on shock for suspension Tuning tips