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Guidelines

The settings on this pressurised Front 
Fork are based on what currently is being 
used in Moto GP racing, furthermore the 
delivery spec is something we like to refer 
to as a “balanced setting”. This means that 
the pressure drop over the bottom valves 
(base valves) and the top pistons (ø25mm) 
are matched.

In order to avoid an unnecessary high in-
ternal pressure or risk of cavitation, please 
use the following guide lines when adjust-
ing the front fork.

The FG 670 front fork can be divided into 
two parts. One being the so-called 
rebound leg (right leg), and one the 
compression leg (left leg).

Start click position in this example:

Rebound (Top right) = 10 clicks open,
Rebound  base (bottom right) = 16, never 
adjust
Compression (top left) = 12
Compression base (bottom left) = 12

Rebound damping adjustment.

The rebound damping is adjusted on the 
top of the right leg. Standard click position 
is 10 clicks open from fully closed position. 
The recommended range of adjustment 
with this setting is 6-16 clicks open from 
fully closed position.

Compression damping adjustment.

As said earlier the compression damp-
ing on this Front fork (FG 570) has been 
checked for balance at the factory be-
fore delivery. In order not to change this 
matched pressure balance between the 
25mm valves (main piston) and the base 
valves (bottom left and right leg), please 
use the following guidelines.

By changing both the top and bottom 
compression adjusters at the same time 
you have a greater chance of keeping the 
pressure balance between these adjusters 
more constant.

For individual adjustments, see next page.

Compression adjustment
Left Hand Fork Leg

Tool 794-01

Clockwise turn 
closes = increase 
compression 
damping

Counter clockwise 
turn opens = reduce 
compression damping

Rebound adjustment
Right Hand Fork Leg

Tool 794-01

Clockwise turn 
closes = increase 
rebound damping

Counter clockwise 
turn opens = reduce 
rebound damping

19

Compression adjusment reservoir valve (Base valve))

Clockwise turn closes = 
increase compression damping

Counter clockwise turn opens = 
reduce compression damping

Tool 794-01

Содержание FG 670

Страница 1: ...Owners Manual hlins Superbike Front Fork FG 670...

Страница 2: ...ehicle manufacturer may 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...

Страница 3: ...orks 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 depend...

Страница 4: ...Adjust 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...

Страница 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...

Страница 6: ...care fully pull out the preload tube 6 Check the oil level according to page 17 NOTE Use hlins Front fork oil 1311 01 only 7 Refit the Pre load tube Install the new spring and refit the adjustment dri...

Страница 7: ...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 Install the...

Страница 8: ...shaft Use a 14 mm wrench to the top and a 19 mm wrench 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 th...

Страница 9: ...iston 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 co...

Страница 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...

Страница 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...

Страница 12: ...talled the same way Apply some red grease 146 01 to the bushing before installation 5 Apply a thin layer of hlins red grease 146 01 to the washer and to the sealing surfaces of the fork seal Install t...

Страница 13: ...ck over the circlip groove make sure that there is no air between the piston and the oil Use tool 720 02 Close the compression adjuster 9 WARNING 8 7 Tool 720 02 13 1675 01 Nut 1674 01 Washer Clamp Co...

Страница 14: ...the piston rod from 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 mak...

Страница 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...

Страница 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 1311 01 only 22 Refit the Pre load tube Install the sprin...

Страница 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...

Страница 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...

Страница 19: ...commended range of adjustment with this setting is 6 16 clicks open from fully closed position Compression damping adjustment As said earlier the compression damp ing on this Front fork FG 570 has bee...

Страница 20: ...lains about lack of tire feel you can improve this by closing the top left compression adjuster 2 3 clicks since these adjustments will give a quicker response This could also improve the rider s init...

Страница 21: ...Notes 21...

Страница 22: ...ad adjustment 0 18 mm 0 18 turns Spring rate 4744 95 9 5 N mm marking 95 Optional springs supplied 4744 10 10 0 N mm marking 10 4744 90 9 0 N mm marking 90 Optional springs 4744 85 8 5 N mm marking 85...

Страница 23: ...27 1 Compression valve LH See page 25 28 1 Rebound valve RH See page 25 29 01656 02 2 Cylinder tube 30 00338 72 2 O ring 31 01700 01 2 Fork leg inner 32 01565 04 1 Stroke indicator 33 00338 63 1 O rin...

Страница 24: ...t 18 01674 01 2 Washer 19 2 Clamp compression See spec card 20 Shim stack See spec card 21 01670 01 2 Piston compression 22 00338 11 2 O ring 23 00530 22 2 Shims 24 01693 01 2 Spring 25 01669 01 2 Sle...

Страница 25: ...s 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 13 Rebound valve 14 01654 09 1 Piston holder 15 1 Washer See spec card 16 Shim st...

Страница 26: ...1 1 Attachment 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 01765 03 1 Pull up spring tool 13 01797 04 1...

Страница 27: ...Notes 27...

Страница 28: ...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 12D Issued 06 07 26 hlins Racing AB Mattias Johansson majo Update Tiina Hara...

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