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Troubleshooting

Below are a few examples of how to adjust 
for the most common road holding prob-
lems in Road Racing driving.

1.

The front wheel “chatters” entering a 
corner, the problem goes away, as soon as 
you let the brakes off, or when you get on 
the power.

•     This is caused by the fact that the fork is working
       too low in the travel and reaches the progressive,
       hard part at the end of the travel.

•     Put on more pre-load.

•     Change to a harder spring.

•     If a lot of stroke remains after riding, drop the oil
       level. See oil level chart.

•     Make sure the front forks have no friction.

•     Rear ride height is to high, too much rear spring
       pre-load.

•     Lower the rear end by taking off pre-loadfrom rear
       shock spring.

2.

The front wheel is jumping during the last 
part of braking.
 

•     If a lot of stroke remains, the oil level is too high. 
Lower the oil level.

•     If the fork is bottoming, put in harder springs and 
keep the oil level.

3.

The front end feels unpredictable and un-
safe in the middle of the corner (between 
braking and getting on power).

•    Not enough rebound damping. Put on more 
      damping.

•     Too much rebound damping. If it at the same time
       feels harsh, take off some rebound damping.

•     Too much compression damping. Also gives a
       harsh feeling. Take off some compression 
       damping.

4.

The front end loses grip coming out of a 
corner.

•     Not enough rebound damping. Put on some more
       rebound damping.

•     Too much pre-load. Take off some pre-load.

•     Rear end is too soft. Put on a harder rear spring.

•     Front end is too high. Lower the front end by
       pulling the fork legs through the triple clamps.

As mentioned in the beginning, the whole 
bike setup affects the front forks. Try to 
understand the feelings and work step by 
step.

NOTE!

Our advice is to change only one thing at a 
time and do everything step  by step.

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Summary of Contents for FG 470

Page 1: ...Owner s Manual hlins Superbike Front Fork FG 470...

Page 2: ...affect the stability of your vehicle hlins Racing AB cannot be held responsible for any personal injury or damage whatsoever that may occur after fitting the suspension Contact an hlins dealer or othe...

Page 3: ...NOTE Gas pressure should not be changed or used as an alternative to adjust the damp ing For better understanding please refer to our oil level chart see page 17 A telescopic front fork is depending o...

Page 4: ...just the rebound damping on the adjust ment screw positioned at the top centre of the right hand fork leg Use a hex key with a spherical head use tool 794 01 Adjustment range from closed valve clock w...

Page 5: ...Proceed as follows it will be much easier if done by two persons 1 Place the motorcycle on a stand 2 Lift up the rear end to a fully extended upper position 3 Measure the distance e g from the ower e...

Page 6: ...are fully pull out the preload tube 6 Check the oil level according to page 17 NOTE Use hlins Front fork oil 1305 01 only 7 Refit the Pre load tube Install the new spring and refit the adjustment driv...

Page 7: ...seal must be replaced 6 First remove the circlip then the seal and finally the washer 7 Apply a thin layer of hlins red grease 146 01 to the washer and to the sealing surfaces of the fork seal Instal...

Page 8: ...and tool 4705 01 to hold the nut on the lower side of the top nut 6 Remove the adjustment driver and the spring Use a wire with a hook and care fully pull out the preload tube 7 Remove the screw and o...

Page 9: ...piston rod unit 12 Fasten the piston rod in a vice Use soft jaws 727 02 Remove the nut with a 13 mm wrench or socket Remove the valve from the piston rod Place all parts including the shims in their...

Page 10: ...ton in the reservoir use tool 720 02 19 Drain the reservoir from oil 20 Use a 17 mm wrench to unscrew the complete compression valve at the bottom of the fork 21 Remove the piston from the compres sio...

Page 11: ...pushing them out Use attach ment bar 1757 01 and dismantling sleeve 1759 07 from the top nut side 26 Tap gently on the attachment bar with a heavy hammer until the bushings are free and can be release...

Page 12: ...bar until it reaches the correct position stop against a shoulder 4 When the upper bushing is in position the lower bushing is to be installed the same way Apply some red grease 146 01 to the bushing...

Page 13: ...ay to the edge of the reservoir Con tinue to fill until the oil level is the same in both the reservoir and in the cylinder tube 9 Push the gas piston with teflon band and O ring fitted to the reservo...

Page 14: ...rom tape Mount Spacer Sleeve Top out spring and the Piston holder 12 Tighten the Piston holder to a torque of 15 Nm 13 Refit the Compression Rebound valve Use the picture below to make it right Tighte...

Page 15: ...n tool 1765 03 to keep the contraction Assemble the complete piston rod into the cartridge tube and tight it by hand 3 4 turns NOTE Make sure that the gas piston is pressed down completely 15 Tighten...

Page 16: ...797 04 to release the top out spring 21 Push tool 1765 03 to a stop and check the oil level according to page 17 NOTE Use hlins Front fork oil 1305 01 only 22 Refit the Pre load tube Install the sprin...

Page 17: ...f the travel is lessened and thus the front fork less progressive The oil level works most efficient at the end of the fork travel Air spring characteristics shown is a general card description to un...

Page 18: ...the oil level is too high Lower the oil level If the fork is bottoming put in harder springs and keep the oil level 3 The front end feels unpredictable and un safe in the middle of the corner between...

Page 19: ...ront fork fluid No 5 1305 01 only Tighten torque Lower triple clamp bolt 12 15 Nm Upper triple clamp bolt 18 22 Nm Grease hlins front fork grease 146 01 red grease Service interval Every 10 hours 19 T...

Page 20: ...9 1 Rebound valve RH See page 22 30 01656 02 2 Cylinder tube 31 01699 02 2 Fork leg inner 32 01565 04 2 Stroke indicator 33 00338 63 2 O ring 34 00194 10 2 Sticker hlins 35 04759 02 2 Circlip 36 01682...

Page 21: ...14 4 3 3 8 Top nut assey Base valve Spare parts list Top nut assey 15 01675 01 2 Nut 16 00153 01 2 Washer 17 00641 02 2 Washer 18 Shim stack See spec card 19 01670 01 2 Piston compression 20 00338 11...

Page 22: ...Washer 15 00153 01 1 Washer 16 01675 01 1 Nut Pos Part No Pcs Description Type remarks Spare parts list Compression valve LH 3 Compression valve 2 1 4 5 6 7 8 9 10 11 12 13 14 15 16 Rebound valve 17 0...

Page 23: ...nt bar 7 01759 07 1 Dismantling bar 8 01759 08 1 Installing sleeve 9 01758 04 1 Guide ring 10 00720 02 1 Measure pin 11 00720 03 1 Pin tool 12 04705 01 1 Spanner 13 01765 03 1 Pull up spring tool 14 0...

Page 24: ...e info www ohlins com hlins Racing AB Box 722 S 194 27 Upplands V sby Sweden Phone 46 8 590 025 00 Fax 46 8 590 025 80 07280 10 Issued 06 07 26 hlins Racing AB Mattias Johansson majo Update Tiina Hara...

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