Ohlins FG 670 User Manual

Owners ManualÖhlins Superbike Front Fork FG 670

13.Remove the Piston holder. Use a 22 mm wrench.14.Remove the Topout spring, the Sleeve, the Spacer and the O-ring.15.Remove the Seal head. Check the

22 23Upper bushingLower bushingHeat air gun22.Remove the outer tube, clean the seal and check the condition. If the seal is in good condition apply so

Assembly of the forks1.Use Tool 786-07 to refit the reservoir tube. Tighten to 45 Nm.2.Use Tool 786-05 to refit the inner tube of the fork leg. Tighte

7.Apply some front fork oil (1311-01) to the inner tube surface and carefully mount the outer tube (slide it completely down). ! WARNING!Be careful no

10.Grip the piston shaft with soft jaws 727-02. Fit the O-ring on the adjustment needle. Apply plenty of red grease on the O-ring so that the needle s

CAUTION!The Washers must be positioned correctly (Notice that there is a difference between the compression and the rebound valve). Also make sure to

! WARNING!Use of infl ammable gas for pressurising the soch absorber can be hazardous. Use nitrogen gas (N2) only!19.Check the gas pressure stipulated

Oil level adjustmentCompared with conventional type of front forks, the upside down front forks are very sensitive to variations in oil level. Therefo

TroubleshootingBelow 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

GuidelinesThe settings on this pressurised Front Fork are based on what currently is being used in Moto GP racing, furthermore the delivery spec is so

Safety signalsImportant information concerning safety is distinguished in this manual by the following notations:This Safety alert symbol means: Cauti

Individual adjustmentsIndividual adjustmentsBelow you can find the recommended ad-justment range for the top left compression leg adjuster, with diff

Notes

Technical informationFork length: 730 mm.Stroke: 130 mm.Free spring length: 260 mm.Rebound adjustment:Base setting 9-12 “clicks”.Maximum open valve 20

1 04732-05 2 Top nut assembly See page 242 01408-04 2 Adjustment driver3 04744-9504744-1004744-90222Spring Option springOption spring25.5/260/9.525.5

1 01473-01 2 Circlip2 01467-03 2 Needle3 00884-04 4 Ball4 01474-01 2 Spring5 00577-01 2 O-ring6 03312-01 2 Adjuster7 03309-01 2 Thin Shim8 00338-72 2

1 01654-09 1 Piston holder2 00530-22 1 Shims3 01149-01 1 Wave washer4 00525-18 2 Shims5 - 1 Washer See spec. card6 - - Shim stack (comp.) See spec. ca

261 00727-02 1 Soft jaws (one pair)2 00786-05 1 Inner tube tool3 00786-07 1 Cartridge tube tool4 01781-01 1 Gas tool5 00797-01 1 Top nut socket6 01757

Notes

More infowww.ohlins.comÖhlins Racing AB, Box 722, S-194 27 Upplands Väsby, SwedenPhone +46 8 590 025 00, Fax +46 8 590 025 8007280-12D, Issued 06 07 2

Öhlins Front Fork FG 670This Super Bike front fork is an improved version of FG 570 with pressurised damp-ing system. FG 670 is based on 6 years exper

AdjustersYour Öhlins super bike front fork is pro-vided with the following external adjusters: • Spring pre-load adjuster • Rebound dampin

Setting up your forksHere are some basic guidelines, how to set up your Öhlins front forks. However, you must remember that the front forks are just o

Changing springs1214 mm wrench1.Unload the spring pre-load completely by turning the adjustment nut counter clockwise as far as possible. Use a 14 mm

18001st, Circlip2nd, Seal3rd, WasherChanging seals1.Remove the fork legs from the motorcycle. Put the fork legs in upright position for about 5 minute

Dismantling the Forks1.Remove the fork legs from the motorcycle. Put the fork legs in upright position for about 5 minutes to allow the oil to settle.

!WARNING!Releasing high pressure gas from the front fork can be hazardous. Do not perform any kind of service until gas pressure is com-pletely releas