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18

General handling set-up

Front suspension.

Front fork travel is not used to its full
capacity. Harsh feeling, front wheel grip is
not satisfactory in bumpy turns.

Suspension too hard.

• Decrease the front fork

compression damping.

• Change to softer springs.

Suspension bottoming, too soft during
entire travel.

Spring too weak or compression damping too soft.

• Increase oil level 5 mm.
• Increase compression damping.
• Change to stiffer springs.

Suspension bottoming, but can handle
smaller bumps.

Damping force not progressive enough.

• Increase the oil level.

Can handle smaller bumps but is too hard
during the last part of the travel.

Damping force is too progressive.

• Decrease the oil level.

Front end feels low, initially feels soft, but is
not bottoming.

The initial spring rate is too soft or spring preload
is too low.

• Increase the spring pre-load.

Feels harsh over small bumps, but using full
wheel travel.

Too much spring pre-load or too much compres-
sion damping.

• Increase the oil level or change

to softer springs.

• Decrease the compression damping.
• Decrease the spring pre-load.
• Clean the oil seals and scrapers. Use Öhlins

grease 146-01 for regreasing.

Can handle the first in a series of bumps but
feels hard after a few more bumps. Frontal
grip insufficient in rough and bumpy turns.

Too much rebound damping.

• Decrease the rebound damping.

Front end rebound too fast after a bump.
Front wheel grip insufficient in bumpy
curves.

Not enough rebound damping, or too much
spring pre-load

• Increase the rebound damping.
• Decrease the spring pre-load.

Front end ”ploughs”, understeers.

Shallow front fork angle. Front end too high in
comparison to rear end.

• Decrease the front fork

compression damping.

• Raise the fork legs approximately

5 mm in the triple clamp.

• Change to softer fork springs.

Front end unstable at high speed, unstable
when accelerating out of curves.

Front fork angle too steep. Front end too low in
comparison to rear end.

• Lower the fork legs approximately

5 mm in triple clamp.

• Change the front fork springs to

harder ones.

Front end unstable during deceleration.

Front fork angle too steep during braking. Front
end too low or rear end too high.

• Increase the oil level in the front fork.
• Change to harder fork springs.
• Increase the front fork

compression damping.

Front end falls into the curves (oversteering)
especially in sand.

Steep front fork angle. Front end too low in com-
parison to rear end.

• Increase the front fork

compression damping.

• Change to harder springs.
• Lower fork leg approximately

5 mm in the triple clamp.

Содержание WR 450 F - 2-TRAC 2005

Страница 1: ...1 Owners Manual hlins enduro front fork Yamaha WR 450 F 2 TRAC 2005 Including Setting up your bike Fine tuning Service the fork General handling set up Technical info Spare parts...

Страница 2: ...ont fork or vehicle or injury to persons if the instructions for fitting and maintenance are not followed exactly Similarly the warranty will become null and void if the instructions are not adhered t...

Страница 3: ...number on the inside of the fork bottom Design hlins new upside down USD front fork is designed to combine the advantages of comfort able safe conventional forks and rigid light USD forks The result i...

Страница 4: ...Setting the spring pre load Measuring Pre load on the spring springs is very important because it affects the height of the motorcycle and theforkangle Consequently handlingcharacteristics canbechange...

Страница 5: ...ct springs and the correct spring pre load before making any adjustments And always start with the hlins rec ommended settings Compression stroke Rebound stroke Flow in compression valve Flow in rebou...

Страница 6: ...erent combinations of springs and oil levels air springs you can alter the characteristic of the fork and tailor it to suit different tracks and conditions CAUTION Theoillevelmustbethesameinbothfrontf...

Страница 7: ...eel and the springs and balls of the adjuster 2 Unscrew the top cap use a 17 mm wrench and tool 1860 01 or tool 1873 01 and a 1 2 socket wrench Put a box under the front wheel so that the springs are...

Страница 8: ...ue of 20 Nm CAUTION The piston shaft must bottom in the top cap before the lock nut is tightened Spring support Optional spacers Adjustment wheel Top cap Spring support Refit the adjustment wheel Tigh...

Страница 9: ...ength is 467 mm If the spring length is under 460 mm the spring must be changed Follow instruction 5 on previous page Adjust the compression and the rebound valves according to specification card Fit...

Страница 10: ...d of the outer leg A sleeve is fitted above the bushing to main tain the correct position 12 Use the special tool 1702 04 to remove the bushing Install the tool in the top of the inner steel leg Insta...

Страница 11: ...parts from the piston holder NOTE If the correct order is lost use the specification card as a guide Put them in the correct order on the bench Clean all parts thoroughly Inspect all parts for wear a...

Страница 12: ...separated by the sleeve on the inner steel leg 18 Apply some hlins red grease on the seals Again use tool 1799 04 flip it around to install the seal in the outer leg Install the circlip and the scrap...

Страница 13: ...motorcycle Tighten the upper triple clamp to 20 Nm and the lower triple clamp to 10 Nm Adjust the compression and the rebound valves according to the specification card 20 Install the damper rod assem...

Страница 14: ...8 41 4 1 N mm 2328 43 4 3 N mm 2328 45 4 5 N mm 2328 47 4 7 N mm Settings Compressing adj 16 clicks Rebound adj 14 clicks L 70 300 200 Oil level When delivered from factory 105 mm Adjustment range 80...

Страница 15: ...7 N mm Optional 1 6 02425 03 2 Fork leg outer 1 7 02409 01 2 Guide Sleeve 1 8 02427 02 4 Bushing 1 9 02431 01 2 Sleeve 1 10 02332 05 2 Sticker 1 11 02412 01 2 Washer 1 12 02410 02 2 Seal 1 13 02015 0...

Страница 16: ...6 00884 01 4 Ball 2 7 00833 01 4 Spring 2 8 01050 01 2 Screw 2 9 00338 59 2 O ring 2 10 02397 48 2 End cap bump rubber 48mm 2 11 00438 61 2 O ring 2 12 02366 13 2 Adjustment rod 2 13 02402 01 2 Nut M1...

Страница 17: ...6 1 leg Shims 00184 14 1 leg Shims 3 32 00641 04 1 leg Washer 3 33 00153 01 4 Washer 3 34 00430 05 2 Nut M8 3 35 01473 02 2 Circlip 3 36 00338 53 2 O ring 3 37 01242 01 2 Adjustment needle 3 38 00884...

Страница 18: ...irst in a series of bumps but feels hard after a few more bumps Frontal grip insufficient in rough and bumpy turns Too much rebound damping Decrease the rebound damping Front end rebound too fast afte...

Страница 19: ...iction or leakage After every race Clean externally and spray with an all purpose oil after washing with detergent Check externally for damage Put a little hlins red grease 146 01 on the steel tubes a...

Страница 20: ...20 07295 23 Issued 05 01 28 Teknisk Illustration 1500 ex hlins Racing AB Box 722 S 194 27 Upplands V sby Sweden Phone 46 8 590 025 00 Fax 46 8 590 025 80 Your hlins dealer More info www ohlins com...

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