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Setting Rider Sag / Spring Preload

1- Position motorcycle on stand with rear wheel completely off ground. Measure from inside fender bolt down to a point on axle or chain adjuster block. If you have a sag scale simply insert into axle hole and measure up to rear fender and make a mark.

2- Remove motorcycle from stand and have rider sit in middle or "saddle area" of seat. Compress the shock several times and let return slowly to achieve an accurate measurement. Now measure same points again and subtract loaded measurement from unloaded measurement to determine sag number. It is important that rider is in full gear and both feet on pegs while measuring.

* If more sag is needed decrease preload on spring (loosen)  /   If less sag is needed increase preload on spring (tighten)

3- Be sure to tighten the top spring preload lock collar after adjusting ( a brass or aluminium punch is recommended to prevent damage to load ring )

Recommended Sag

50cc                         65-70mm

65cc                         75-80mm

85cc                         85-95mm

125 - 450cc           100-110mm

Fork Tube Height

1- Fork tube height is the amount the outer fork tube ( excluding cap ) sits above the top edge of the triple clamp. Raising or lowering the tube height will effect the handling of the motorcycle. Raising tubes up in clamps places more weight on front wheel which can create better cornering but also make bike less stable at high speed. Lowering the tubes will create more stability at high speed but loss of cornering performance. We test many different tube heights for each bike to determine the best setting for you and the type of tracks / trails you will be riding. * Deep sand or mud we recommend lowering fork tubes to prevent oversteer ( tucking front wheel ) *

2- It is very important that the upper and lower triple clamp bolts are torqued to spec. ( Refer to owners manual )

Bleeding Forks

1- Bleed the air from forks before every race to ensure best performance. The build up of air in fork will cause the fork to become harsh and inconsistent.  * Do not over tighten bleed screws as most are brass or aluminium and will break easily. * This does not apply to KYB Air Forks *

Setting Steering Tension

1- Proper torque on steering bearings is often overlooked but is critical in proper handling of the motorcycle. A slight drag on the steering bearings will allow you to be more consistent in rutted sections and will help the overall stability of bike.

2- To set proper drag on steering bearings loosen steering stem nut on top clamp and loosen top triple clamp pinch bolts. Next use either a spanner wrench or a soft punch to tighten load ring under top triple clamp. Once tightened to desired amount tighten steering stem nut first and then torque triple clamp bolts last. * With bike on stand and front wheel off the ground you should feel a slight resistance when you turn bars side to side. Bars should not fall under there own weight. If so repeat the process and add more load to bearings * Keep steering bearings greased regularly *


*  It is very important to keep all chassis bearings clean and greased to maintain maximum performance. When linkage and swingarm bearings become dry and rusty the shock will become "sticky". This will make the shock stiff on compression and the rebound will become very slow which will cause packing and poor traction.

Total Control Racing,  1965 McCray Road,  Burlington NC 27217
Phone: 336-578-1906,  Email:

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