50
Figure 32 Some configuration of clutch spring stack
. Each ‘spring’ stack contains multiple
springs (Belleville washers) - arranged into three, four, or five ‘flying saucers’, or turned away
against the flat washer(s). Shown is the 4 ½ stack.
Stack Total
Springs
Flying Saucers
or Cymbal Pairs
Turned Away
or Dish Stacked
Std. Flat
Washer
5 ½
11
5
1
Clutch adjustment washers
Your Cobra comes stock with a single flat washer at the bottom of the spring
washer stack. The thickness of that flat washer is 0.031” (0.79mm). Cobra offers
several thicknesses of thin adjustment washers that allow clutch engagement
tuning. Increasing the flat washer(s) thickness increases the engine speed for
clutch engagement thus increasing the abruptness of clutch engagement (harder
hit). Conversely, decreasing the flat washer(s) thickness decreases the engine
speed for clutch engagement thus decreasing the abruptness of clutch
engagement (softer hit).
Part #
Thickness mm (inch)
HKCSM015 1.5
(0.060)
HKCSM012 1.2
(0.047)
HKCSM008 0.8
(0.031)
HKCSM006 0.6
(0.025)
HKCSM005 0.5
(0.020)
HKCSM004 0.4
(0.015)
Use the table above to order adjustment washers. Replace the stock washer with
the proper combination of adjustment washers that delivers the desired clutch hit.
Hit
Thickness (mm)
Thickness (inch)
Softer 0.8
0.031
0.9 (0.4 + 0.5)
0.015 + 0.020
1.0 (0.5 + 0.5)
0.020 + 0.020
1.1 (0.6 + 0.5)
0.020 + 0.025
Harder 1.2 0.047
CAUTION:
It is easy to prematurely damage the clutch and other engine components with
improper clutch adjustment. If you are unsure of how to adjust the clutch, by even
the slightest, contact the Cobra Technical Support Group before making
adjustments.
Clutch shoe wear:
•
If the clutch has been slipping and shows signs of glazing, it is best to replace
the shoes. We have found that once the shoes are glazed, even if deglazed
with emery paper or a file, the performance is reduced.
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