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Freebird
08-31-2006, 04:04 AM
Cruise

Question:
My '88 Royale will be going along fine on cruise when all of a sudden, it shuts off. I can't associate it with hitting a bump or anything like that. Any ideas?


Answered:
If the resume light comes on and you can reset the cruise; the Clutch lever has to much play (this should also allow you to start the motor in gear), or the rear brake switch is to tight and needs adjusting. The clutch lever is the most common; it can be a worn bushing or a bad switch, or on high mileage bikes it can be a warn pivot hole in the lever its self. The series circuit for this goes from the clutch switch to the hand brake switch to the cancel switch to the rear brake switch. These switches are all normally closed, so any switch can kill the cruse.

Has it lost 5 miles per hr from the set speed?
This could be the vacuum pump or the speed sensor on the speedometer.
Their are tests in the service manual to check out these possibilities
Fred Vogt

The following problem came up at V-Daze in Kalispell MT. . The member got the bike to a Yamaha shop that worked long hours to try to get this member back on the road. They changed the stator, regulator and even put a new battery in the bike and because they didn't find the problem they didn't charge the member for the work or the parts they used. I would like to thank that dealer for trying so hard to resolve this member's problem and if they read this. "thank you for your support" Symptom: Battery shows discharge with the motor running, if the clutch lever is actuated it charges again. If the front or rear brake is actuated it charges, but not as much as if the clutch lever is depressed. The curse control will not work. All of the fuses are ok. If you disconnect the wiring to the clutch switch or ether brake switch the bike charges normally. If you disconnect the cruise control unit it dose not help. If you disconnect the vacuum pump it dose not help. If you disconnect the cruise controls on the right handle bar the bike charges normally. Checking resistance with a meter shows no shorts or shorts to ground on any of the connectors.

Solution: Upon dissembling the cruise controls on the right handle bar we found a wire from the cancel switch pinched under a screw that held the switch together. After taping the wire and reassembling the controls the bike worked normally.
Note:
To say that this was a bizarre problem would be an under statement. It was obvious that this wire was pinched at the factory when it was assembled; but waited for 30,000 miles to show it's ugly head. I call this type of short an active short and is very difficult to find because unless voltage is present it will not show a short on any meter. The path for the cruise control cancel voltage is from the rear brake to The front brake then to the clutch switch then to the controls on the right handle bar and finally to the cruise control unit. I doubt that this problem is going to be a common one but; it dose bear thought because any short in the canceling circuit of the cruise will give similar symptoms.

Fred Vogt 1037