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CB1100 Idle speed instability problem
The three part video is 10 minutes + 10 minutes + 8 minutes, 48 seconds.
Part two shows the “cleaning”.

There is risk, since contact cleaner may dislodge particles, but might not completely remove particles…which may be a future problem. If “cleaning” worsens the issue, there is more risk, since the TPS is not available without purchasing the entire throttle body assembly. For automotive applications, replacement is standard procedure.

OTOH, contact cleaner and filtered compressed air in a can have helped maintain 1973 and 1977 travel trailers at my ranch. If the TPS is to be cleaned, perhaps alternate contact cleaner with filtered compressed air, two or three times.

Keep in mind that the video is of a Yamaha, so diagnostics are not applicable and access on our CB1100s is VERY easy. The only complication on mine would be removing the white paint indicating that fastener torque was checked. There is so much paint, that I cannot see if it is Allen or Torx (the Yamaha was T25 security Torx).

The bottom line, at this point, is that if there is no vacuum loss, if there are no codes (such as DTC 8-1, 8-2), the IAC and/or TPS functions are suspect and cleaning may solve the problem.
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RE: CB1100 Idle speed instability problem - by SportsterDoc_imp - 12-14-2017, 01:45 AM

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