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| Trouble-Shooting | ||
| Problems in the front wheel suspension | ||
| Problems | ||
| Fork does not respond well, noticeably high starting force when pressing from the zero position. Uncomfortable on bad roads, jolts are transferred to steering and chassis; headshaking tends to occur when accelerating or driving at high speeds on bumpy surfaces. Poor front wheel tracking on bumpy surfaces, wheel tends to hop.e result of a custumer inquiry. | ||
| Possible Causes | ||
• Compression damping too high particularly in low speed range. • Fork tubes assembled in twisted position. • Too much mechanical friction in mounting points of sliding pipe. |
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| Solutions | ||
• Decrease compression setting. If necessary, use lower viscosity fork oil. • Loosen clamps on the axle, bottom out fork and tighten clamp. • Disassemble fork, polish surfaces, install low-friction radial shaft seals. |
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| Problems | ||
| Front end uncomfortable on bad road surfaces, transfers jolts directly to chassis, front wheel tends to hop and cause headshaking. Even when braking, motorcycle dips very little, awkward to turn, tends to understeer, overall hard to handle. | ||
| Possible Causes | ||
| • Fork springs too hard. This makes the bike too high in the front (harder to handle). • Compression damping too high in both high- and low-speed range. • Fork oil level too high, makes suspension effect too progressive. |
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| Solutions | ||
| • Measure and adjust negative suspension travel with and without rider. If necessary, install softer fork springs. • Decrease compression setting. If necessary, use lower-viscosity fork oil. • Reduce fork oil level. |
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| Trouble-Shooting | ||
| Rear wheel suspension problems | ||
| Problems | ||
| Rear wheel suspension does not respond well, noticeably high starting force when pressing from the zero position. Uncomfortable on bad roads, jolts are transferred to bike’s rear and entire chassis. This may cause headshaking when accelerating or at high speeds on bumpy roads. Poor wheel control, rear wheel tends to hop. | ||
| Possible Causes | ||
| • Mechanical friction in suspension system too high. • Too much friction between damper rod and bearing/sealing ring. • Compression damping too high in low speed range. |
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| Solutions | ||
| • Ball-and-socket joints on the shock absorber or linkage mounting points stiff. (Clean, lubricate, or replace). • Replace damper rod together with mount and seal. • Decrease compression setting or, if necessary, disassemble shock and have damping assembly system modified. |
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| Problems | ||
| Rear wheel tends to chatter uncontrollably on bumpy surfaces. When braking and shifting down, rear wheel begins to tramp slightly. | ||
| Possible Causes | ||
| • Too much play in suspension system, noticeable when swing arm is moving with an unloaded rear wheel. Maximum play measured on rear axle: 2 millimeters. • Too little damping force in the low speed range of rebound and compression stroke. The damping piston may also be leaking. |
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| Solutions | ||
| • While moving the swing arm, check all mounting points for possible vertical play and replace, if applicable. Parts from retrofit specialists (Emil Schwarz, precision bearings) are usually better than mass-produced parts. • Increase compression and re-bound damping |
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| Trouble-Shooting | ||
| Additional problems in ride behavior | ||
| Problems | ||
| The motorcycle’s steering is sluggish. Requires a great deal of steering effort even when maneuvering, steering feels mushy and indirect. Insufficient steering precision in curves. | ||
| Possible Causes | ||
| • Pressure in front tire too low. This creates too large a contact patch; the tread and sidewalls are instable. | ||
| Solutions | ||
| • Increase tire pressure according to the information provided by the tire manufacturer. | ||
| >> More? Than click here to order the book "Motorcacle Suspension Technology in Detal!" |
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