The four large outer springs should have:
Length unloaded = 263mm +- 2mm (dia of steel springs=7.5mm)
Length loaded with 90kg+-10kg = 235mm
Length tolerance loaded is 4%
The four smaller internal springs should have:
Length unloaded = 152mm +- 1.5mm (dia of steel springs=5.5mm)
Length tolerance loaded is 4%
The four smaller internal springs should have:
Length unloaded = 152mm +- 1.5mm (dia of steel springs=5.5mm)
Length loaded with 135kg+-4kg = 135mm
Length tolerance loaded is 6%
The narrower springs go inside the larger ones. The two connecting rods that go though the springs and out of the rear of the spring box should be straight and the threads in good condition. There are two center bushes surrounding these rods at the rear exit of the spring box are retained by cotter pins (see screwdriver pointing to one in the photo). There are two other half bushes that are retained with set screws to the side plates of the frame that go through the two outer spring.
I remount the swing arm. The clearance between the swingarm pivot and the bronze bearings should not be greater than 0.10mm. Tightening the square pivot bolts and centering it on either side gets the clearance to less than 0.10mm. The two connecting rods are inserted from the rear of the swingarm through the two holes, through the male and female jam nuts and into the half bushes at the spring box.
I install the outer and inner springs. I tighten the front spring loaded face plate so that the flat face of the plate is 235mm from the inside rear of the spring box and the face plate is parallel to the spring box leading edge.
The flexible link (part #16 on Table 14) that fits inside the lower tube at the front of the swingarm is filled with red grease - it pivots inside the tube as the swingarm pulls the connecting rods compressing the spring.
With the bike on the center stand, turn the round knob fully to the right for two-up riding and fully to the left for solo jaunts. On this bike it is firmly set to monoposto -no one dares take a biposto ride on this bike!
Length tolerance loaded is 6%
The narrower springs go inside the larger ones. The two connecting rods that go though the springs and out of the rear of the spring box should be straight and the threads in good condition. There are two center bushes surrounding these rods at the rear exit of the spring box are retained by cotter pins (see screwdriver pointing to one in the photo). There are two other half bushes that are retained with set screws to the side plates of the frame that go through the two outer spring.
I remount the swing arm. The clearance between the swingarm pivot and the bronze bearings should not be greater than 0.10mm. Tightening the square pivot bolts and centering it on either side gets the clearance to less than 0.10mm. The two connecting rods are inserted from the rear of the swingarm through the two holes, through the male and female jam nuts and into the half bushes at the spring box.
I install the outer and inner springs. I tighten the front spring loaded face plate so that the flat face of the plate is 235mm from the inside rear of the spring box and the face plate is parallel to the spring box leading edge.
The flexible link (part #16 on Table 14) that fits inside the lower tube at the front of the swingarm is filled with red grease - it pivots inside the tube as the swingarm pulls the connecting rods compressing the spring.
With the bike on the center stand, turn the round knob fully to the right for two-up riding and fully to the left for solo jaunts. On this bike it is firmly set to monoposto -no one dares take a biposto ride on this bike!
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