How to remove and replace forks on the Suzuki GSXR 1100 K model (1989)
Remove front wheel, brake calliper etc . Undo top and bottom yoke pinch bolts and slide out fork leg. Clamp chrome tube in a soft jawed vice and remove top nut carefully as it is under some load and will fly away, (but its not too much you can hold it with your hand). Tip out remaining oil slowly so as to not loose spacer on top of main fork spring. Clamp lower aluminium leg in vice by calliper mounts and remove allen screw in extreme end (if the wheel spindle was in you couldnt see it) This is the only part that might be a problem as the inner end may turn. An impact wrench may help or if not a simple broom handle shoved up the other end is often enough. Once this bolt is removed the leg will split. Now lever out the dust cover to reveal the wire circlip holding in the fork seal. Remove the clip and lever out carefully the old fork seal. Fit new seal using a large socket and mallet or something similar and reassemble in reverse order, not forgetting to add correct amount of new fork oil.
SOURCE: weaping fork seals.
a trace is normal, to much is not. that probable is due to dryed out fork seal, as they ere not getting lubed due to inactivity. the air fittings are for ajustable damping. if you ride 2 up or yourself being heavy or you just want a firmer fork suspension. i don;t know the range for your bike. try asking the dealer.or just put in 5 lbs. and try. if the presure doesn't last then you have leaky seals......
SOURCE: i need to get new fork seals and cant find out
Go to this site and you can download a free PDF service manual. There is a '76 manual there. It is close enough to your '78 to be extremely helpful as not much of anything changed in those two years. The listing just says "Suzuki GS750 ". Page 90 has a diagram. Page 93 says to mix 50/50 10w30 motor oil and standard ATF (automatic transmission fliuid) for the fork oil. You do not need to tear down the forks to install a new seal and the seal can be installed without the special tool.
www.carlsalter.com/motorcycle-manuals.asp
Go to the site below where you can see a parts diagram for your specific bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part, the part is not in stock. www.babbittsonline.com/pages/parts/viewbybrandand/parts.aspx
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SOURCE: Fork oil is leaking
It's not difficult, but is messy and needs a special tool or a bit of ingenuity.
You could save yourself a bunch of cash by stripping them off, cleaning them, emptying the existing oil out and cleaning out the fork - then whip it into your local shop for a seal replacement and top up.
SOURCE: gsxf 600 fork seals are leaking
Get a manual as you will be in over your head if you haven't done one before, and it will have all the steps in there to do it. There are a bunch of parts in the lower leg of the fork. If you want a better set up then you have, I would look at replacing them with some 89-97 model forks as they are adjustable, and our 88 models are not.
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