Gilera Nordwest, Workshop Manual

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Greasing the bearings.
Support front of bike and remove front wheel. Take of the callipers and
tie them up to the bike somewhere. Disconnect the speedo. Take the
top yoke off. (Be careful as when you do this, the forks will fall out and
they are quite heavy). The forks will come out complete with the bottom
yoke and one half of the bottom bearing and the rollers. The top race will
be left complete at the top.
Clean roller cages and races in petrol or something similar. Inspect the
races for any signs of dents or damage including rust. If all is well, then
thoroughly grease the rollers, re-assemble and adjust as above.
Because you have not loosened the bottom yoke clamps, the forks will go
back together easily and straight.
If you have to change the races, the difficult bits are getting the bottom
inner race off the stem and getting the outer races out of the steering
head. There are tools designed to do the job and a local repair shop
MAY lend/hire them to you. Otherwise, you’ll need a long punch which
you can put through the head stock and tap the race out, first one side,
then the other, a little at a time. Getting the bottom inner off is tricky.
Carefully tap a slim cold chisel or screwdriver under the race, first one
side, then the other, but go steady. You will probably damage the dust
cap which is under the race, so be sure to replace it (very cheap). The
important thing when refitting the races is to get them fully seated all the
way round. Don’t hit them directly with anything metal, use a wooden
drift. The races will probably settle a bit after about 10-20 miles, so
check the adjustments
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