grease (not ordinary grease-as it will attack the rubbers and cause them to swell, although I know of
riders who use ordinary grease and it does not seem to do much harm. A fairly thin sticky grease is best.
Vaseline a not a good lubricant (Not in this context anyway). Then surround the lot with one of the later
type rubber gaiters each end, not the shiny PVC ones used on 750's.
Treat the back unit the same way when the opportunity presents itself, but as the back unit is wider,
higher, better protected, and, you, will agree, harder to get at, it does not go wrong so quickly.
Engine bolts should be bolts not studs, the washers should be plain. and the nuts should be Nyloc or
plain. Here again no star washers and no all metal locking nuts as they cannot be check tightened.
The centre stand is a joke. Having said that, I know of a 750 which has done 50.000 miles on the same
stand. Well, off the same stand, if you see what I mean. O( course the prop stand is worn out. The 850
stand is stronger at the pivots and the cross tube, and is, theoretically, available as a kit to fit 750's. Part
no. 064874 is what you should ask for.
The 'S' type made for the Americans and one of the faster early models (1970). Note the lack of cush drive rear hub
(bolt up as Dommie), and the T.L.S. front brake. Both exhaust pipes up the left side made a beautiful sound.
Photo credit: Motor Cycle
STOP PRESS:
OIL IN TIMING CASE. When re-starting a post '72 engine which is completely dry, pour oil into the inlet
rocker cover so that it drains down to oil the aiming chain.
CARRIER: Fittings on the bolt that is also .the top suspension bolt, check here for } inch of clearance
between carrier and spring collar.
REAR SUSPENSION UNITS: On models with Engine Nos. 750 200000-255509 and 850 300000-305500
there were a few faults in construction, in that the centre tube of the rubber ferrules is too short allowing
the whole assembly 4o be -locked up solid when the bolt is fully tightened. There should be sufficient
gaps between the frame and -the suspension unit to allow free movement. It there is any doubt change
both suspension units in case of weakening.
ISOLASTIC SHIMMING: The gap in this assembly should be reduced to 0.005 inch or even less, as long
as some movement exists all is satisfactory. although never lock the shimming up solid as this breaks the
frame and/or the head steady. A broken head steady should never be repaired by welding or such Fit the
later box section one.
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