Counter Balance Adjustment ( ST1300 )

[KoTAOW]

Contributed by Mark Lawrence.
Original article can be found here:  http://motorcycleinfo.calsci.com/ST1300_b.html#Engine

Mark is the owner of: www.calsci.com

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Counter Balance Adjustment ( ST1300 )

Required tools:

• 5mm Allen wrench
• 10mm wrench
• screwdriver

All are available in your ST1300 tool kit.This job is a bit easier if you also have a work light nearby to help you see what you are doing.

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1.  The first few steps must be done with the engine cool to the touch. Remove the black fairing nose piece. To do this, remove the three nylon rivets under the nose of the fairing, then two Philips© screws and two rivets on the nose piece. You can pull the nose piece out without removing any other fairing pieces. The adjusters are on the front of the engine on the left side, under the clutch lever.
   
2.  Using the 10mm "bent" wrench in the Honda toolkit, loosen the pinch bolts. Don't loosen too much, or they will rotate on their own when you warm up the bike. Just loosen them enough to turn the adjusters.

3.  Locate the punch mark on your adjusters. Adjust the upper balance shaft first, and the lower shaft second.
Upper: turn counterclockwise until resistance, then back off 1 notch.
Lower: turn clockwise until resistance, then back 1 notch. This will get you very close.

4.  Now start the bike and let it warm up. While the bike is running you can fine tune your adjustment.
Upper: turn counterclockwise until squealing is heard, then back off till squealing stops.
Lower: turn clockwise until squealing is heard, then back off till squealing stops.
   
5.  Rev the bike a few times to check that neither whine nor rattling are excessive. Readjust balance shafts as necessary. Turn the bike off.
   
6.  Tighten up pinch bolts. Attach fairing nose piece.

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Page 12-12 and 12-13, of the Honda ST1300 Service Manual.  See attachment below.

Loosen the upper and lower balancer shaft holder pinch bolts.
Adjust the backlash while the engine is cold ( below 35 C / 95 F ) and the engine is NOT running.


Turn the upper balancer shaft counterclockwise until resistance is felt,
then back it off one graduation using the punch mark as a measurement.


Turn the lower balancer shaft clockwise until resistance is felt,
then back it off one graduation using the index line as a measurement.


Warm up the engine and let it idle.

If the balancer gear noises are excessive, adjust the balancer backlash as follows:

1.  Turn the upper balancer gear shaft counterclockwise until the gears  begin to make a "whining" noise.
Then turn the gear shaft clockwise until the gear "whining" noise disappears.  Tighten the upper balancer shaft pinch bolt.


2.  Turn the lower balancing gear shaft clockwise until the gears begin to make a "whining" noise.
Then turn the gear shaft counterclockwise until the gear "whining" noise disappears.  Tighten the lower balancer shaft pinch bolt.


After all gear backlash adjustments are done, snap the throttle and make sure the gear noises are not excessive.

If the gear "whine" noise is excessive, the backlash is too small.

If the gear "rattling" noise is excessive, the backlash is excessive.


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Thank You again for your contribution Mark Lawrence