SP125 Limited
22 Walker Wood, Baildon, Shipley, West Yorkshire, BD17 5BE, England
Telephone 01274 583231 steve@sp125racing.com Mobile 07738 626165
RS125 Setting Data & Maintenance Information
RS125R / RS250R Notes on Frame Maintenance
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| RS125R / RS250R | |||||||||||||||||||
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 Frame |
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| Frames should be checked if the machine was subjected to a large impact force when fallen down. Even slight falling down events may result in exposure to impact force higher than expected. In particular, careful check should be made for cracked weld or deformed parts. | |||||||||||||||||||
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Wheel bearings |
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| Wheel bearings should be so installed that the wheel turns smoothly when mounted in vehicle, instead of when not. It is recommended that the distance collar be slightly stiff between inner bearings at the both sides when the wheel is not mounted in vehicle. The distance collar should not be free inside the hub. | |||||||||||||||||||
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Caliper cleaning |
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| Calipers should be cleaned using household detergent, instead of brake cleaner or gasoline. Use of brake cleaners or gasoline would cause swelled or deformed caliper seals, resulting in stuck caliper pistons. | |||||||||||||||||||
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Tightening engine
mounts (RS125R) |
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Tightening engine mounts (RS125R) The year 1998 and later RS125R has changes to engine mount upper and lower adjust bolts/lock nuts tightening torque in order to improve rigidity.
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Front suspension inner
pressure adjustment |
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Repetitive suspension strokes will cause air ingress
into the inside from the seals. This will result in increased inner
pressure, leading to suspension which gives counter-force as compared
with the (in particular initial) stroke. To solve this problem, it is recommended that the suspension covers be removed with the stand raised to release suspension inner pressure. This gives the suspension willingness to move from the beginning to run. (Colder ambient temperatures cause harder fork oil, resulting in
degraded driving comfort in the beginning of riding. In this case, it is
recommended that suspension damping be reduced by 2 to 3 notches for
both compression and elongation sides to create riding comfort from the
beginning. |
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Front axle torque
management |
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Adjustment should be made so as to secure proper torque
put onto the axle. Insufficient tightening torque on axle split-tightening bolts or insufficient torque to the axle caused by ingress of foreign matter to axle holder splits largely degrade the front stability. If you are faced with a problem as to where to proceed in suspension setting, check should be made. Top and bottom bridges, handle holders, and steering damper holders securing the front fork should be tightened to a specified torque. Extremely high or low tightening torque will greatly change suspension feeling, making setting impossible. Toque values specified in the manual should be strictly followed.
*Specified torque above is given for dry conditions. Do not tighten under wet conditions. |
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Rear axle shaft
installation/removal |
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With the changes to rear swing arms, the 250 class also
has changes to rear axles employing self-locking nuts like the 125
class. These self-locking nuts provide higher tightening torque, so care should be exercised not to destroy threads. Any dirt or foreign particle should be removed from threads before tightening. (tightening torque: 7.0kgf.m for RS125R and 8.2kgf.m for RS250R) |
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Coupler cleaning |
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Especially in older machines, corrosion or dirt inside
the couplers in the electrical system may cause electrical
disconnection. One example of these problems is engine misfires which may occur after rainfall. To avoid these problems, couplers should be periodically removed for cleaning (especially after rainfall). When couplers are replaced, they should be inserted until click noise occurs. Unless secured, they may come off because of vibration during running. |
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For driving safety |
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The 2001 and later year 125 and 250 has had caliper
bolts holed for wire locking. Wire lock should be made before running. Wire lock does not prevent loose bolts from loosening further, but if you have a usual practice to do wire lock, you are likely to find loose fasteners before running. If brake calipers should fall off during running, serious crashes will result. Consumers owning 2000 and earlier year models should have their calipers replaced with new ones holed for wire locking. Wire lock holed bolts (common to the 125 and 250)
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Position changes |
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The 2001 year RS250R has positions largely changed. Use
of the shorter tank in length and narrower clearance between the handle
and the seat allows riders of any physique to aggressively control the
machine. However, a rider of large physique would have a difficulty in holding the lower half of the body during braking, leading to excessive force applied to the handle and degraded turning ability. To solve this problem, pads or something should be attached to the tank to secure that the rider can hold his/her lower half of the body during braking. |
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Ride height
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For the 2001 year model, since the engine is mounted at
a height about 50mm higher than the 2000 year model, the center of
gravity is 40 to 50mm higher than the previous model. For setting a ride height, lowered ride height at the front and rear would provide nimble steering feeling like the 2000 year model. However, significant lowering of vehicle height should not be done in order to obtain the 2001 year model's turning ability. The 2001 year model is designed to provide turning ability taking into consideration center of gravity , dimensions, and body rigidity, so care should be exercised to greatly alter the specifications. |
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