#3230 1987-1990 Exciter Comet Clutch Kit
1. Remove the six bolts from the outer cap on your primary clutch and remove the stock spring and weights.
2. Inspect the primary clutch weights, pins, rollers, and bushings for wear. Clean and replace any worn parts. Lubricate the buttons, rollers, weights. Remove any shine from the clutch sheaves with a medium grade sandpaper then thoroughly clean the belt surfaces with lacquer thinner.
3. Reassemble the primary clutch installing the new supplied spring and weights.
4. Remove the secondary clutch and disassemble by removing the snap ring from behind the helix cam.
5. Clean and check all parts for wear, especially the nylon slider buttons. If they show any wear replace them. Remove any shine from the clutch sheaves with a medium grade sandpaper then thoroughly clean the belt surfaces with lacquer thinner.
6. The stationary sheave has two brass bushings pressed in. You should repack with grease between these two bushings.
7. Adjust the belt shims in the center of the clutch so that the belt is flush with the top of the sleaves.
8. Install the new supplied spring and helix cam and set the spring position to Bi and prewind to 30 degrees.
9. Install two retaining washers between the helix cam and snap ring. (the original one plus the extra one we supplied)
Note: Proper shift RPM range is 7700—7900 with the #1668 pipe and 7800-8000 with the #1668 pipe and #1906 porting. The secondary clutch can be adjusted tighter or looser as necessary to achieve this RPM. The higher the degrees prewind the higher the RPM the sled will run at. This clutch kit has been tuned with a factory Yamaha belt. Any other brand will probably cause a performance loss.
20 degrees = Al Top end on hardpack or ice
30 degrees = Bi Standard setting
40 degrees = C2 Warm days
50 degrees = A2 Warm days and heavy snow