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HRC Setting Data & Maintenance Information

RS250R Suspension Directionality


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Year

'97-'00



'01



'02-




Feature

NX5 type
Slightly stronger damping like the 125


NXA type (full model change)
Rear link characteristics slumped in the latter half, making use of traction


NXA type
Laminated type valves used for front.
Better initial movement for rear




Directionality

Somewhat raised rear height with improved initial turning.
Change direction at relatively small radius corner and make sooner points where throttle is widely opened.

Lowered rear height to give better initial grip feeling at the rear. 
Points where traction rises in link characteristics will be used for rising up.

Setting is made so as not to suppress gentle suspension movement.
Basically, same as the 2001 year model.



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These settings are intended to obtain better turning ability from the RS although the standard settings are enough to go around.

•Example of basic suspension setting on circuits (2000 year RS250R)

                      Front                                                                                                  Rear

                     
Fork leg height    Spring pre-load    Rebound           COMP                     Ride height    Spring pre-load     Rebound                COMP

Standard        
14mm                 18mm                 8th notch back  8th notch back          24mm           175mm                12th notch back     12th notch back

Setting for 
dry condition   14mm                18mm                 7th notch back   8th notch back          27mm           172mm                16th notch back     12th notch back

Setting for 
wet condition   14mm                24mm                 8th notch back   11th notch back        25.5mm        175mm                 21 notch back       17 notch back
*Data above are given for informational purposes.
*Settings vary with weather conditions.
*Setting should be made while checking the state of the machine.

Projection, initial, and vehicle height will be changed to increase front loads.
With rear Rebound damping adjustment released, braking or throttle off will be used to produce front and rear pitching, leading to increased front loads, which allows sooner direction changes at the beginning of the corner. 
In the setting above, rear suspension stroke of around 1/2 to 3/4 of the shaft would provide the RS with excellent initial turning ability (front: nearly full stroke).
Then spring rate change or initial adjustment should be made depending upon rider weight or riding style.In a circuit, like the Suzuka, where there are high-speed corners, allowing wide-open throttle running, and ascending S-shaped corners, further increased load to the front with the dry sets would cause rear suspension stroke during acceleration, avoiding degraded turning capability resulting from reduced front loads. 

Example of creating turning ability at high-speed corners with wide open throttle and ascending corners

                                      Front                                                                                                Rear        
      
                                      Fork leg height    Spring pre-load   Rebound           COMP                   Ride height   Spring pre-load   Rebound         COMP

Setting for dry condition
  17mm                 18mm                7th notch back  8th notch back       28.5mm        175mm        16th notch back    12th notch back
*Data above are given for informational purposes.
*Settings vary with weather conditions.
*Setting should be made while checking the state of the machine.

Picture
The RS250R, a completely new model, has been designed to provide higher turning capability.
It has incorporated dimension changes and engine mounting position changes, allowing natural handling at the initial stage of turning. Also, overall rigidity balance has been attained when running at clipping points through the machine rising, providing high turning capability. 
The suspension system has undergone major specifications changes as well. The front is the slide fitting 43mm and the rear is 46mm with altered link characteristics, which have attained improved absorption, road holding feel, and traction.
Actually, settings should be so made that the front and rear can aggressively move, like the RS125R. Especially, the rear is designed to be slightly stiff at the initial stage of stroke and gentle in the latter half of the stroke since the link ratio is gently sloped in the latter half of the stroke.
Accordingly, if settings are made so that the rear suspension is stroked by the half only, the harder part of the suspension only would be used, resulting in ineffective traction.

Picture
Picture
Judging from the ratio curve above, the 2001 year model seems stiffer. However, actually the 2000 RS has a spring rate of 7.8kgf/mm, while the 2001 RS has a spring rate of 7 kgf/mm which is softer than the former, resulting in nearly overlapped lines in the graph.
                        Front                                                                                                 Rear

                       
Fork leg height   Spring pre-load   Rebound            COMP                     Ride height   Spring pre-load   Rebound               COMP

Standard          
14mm                18mm                8th notch back   8th notch back         31mm           164.1mm           10th notch back     8th notch back


Setting for 
dry condition     14mm                18mm                 8th notch back   8th notch back        29.5mm        164.1mm           11th notch back    11th notch back


Setting for 
wet condition    14mm                20mm               16th notch back  16th notch back        25.5mm       164.1mm            21 notch back      17 notch back
*Data above are given for informational purposes.
*Settings vary with weather conditions.
*Setting should be made while checking the state of the machine.


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SP125 Limited
22 Walker Wood,  Baildon,  Shipley,  West Yorkshire,  BD17 5BE,  England
Telephone 01274 583231      steve@sp125racing.com      Mobile 07738 626165
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SP125 Limited Disclaimer
Honda, HRC and all other parts supplied by the SP125 Limited are not guaranteed when used in competition events.
As such, it is a condition of our making all parts available that it is solely the decision of each individual, rider, team member or 
team whether they choose to use any part supplied and in doing so, absolve the manufacturer and SP125 Limited of any or all 
such claims, including damage to equipment and/or injury to personnel irrespective of how caused.

All parts remain property of SP125 Limited until paid for in full.

All 'special order' parts, that are ordered specially under the instruction of the customer, are non returnable and non refundable.
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