Turn of death ?

[58Woody]

99 IS Trike.
Kinda hard to describe........Well here goes.
Sometimes when I do a left hand "u" turn She shuts down.
Starts right back up. Only has happened during left U turns.
(Remember "sometimes". Doesn't happen every time)
I went into a parking lot and tried it both ways, And of course
nothing happened....either way.

Any ideas???

[Gryphon Rider]

My guess is the tip-over switch, which is mounted to the centre cover in front of the battery, sees your sharp left turn as a tip-over to the right.  Maybe because your u-turn starts on the right shoulder where the road is already sloped down to the right, that makes it more likely to trigger the switch.

[John Schmidt]

Good possibility on that. Try a little test; make a sharp turn at a slow pace, if it doesn't go off then go back and make the same turn a little faster. Make each pass/turn a bit harder and faster, that might be your answer.

[Valker]

If the tipover switch is the culprit, you will have to turn off the key and back on after it dies to restart it.

[Challenger]

If the Trike in your post is your ride, I would bet against the tip over switch and like Valker said you would have to cycle the switch to reset it. I'm betting on a harness or connection to the kill switch that gets pulled on when you turn the handle bars full left.  Just a guess though.

[Gavin_Sons]

Make sure the tip switch it upright and not cocked one way.

[BF]

Probably gas starvation.  Stop bringing it up on two wheels every time you turn left.  I know it's fun and all....but.....

[R J]

When we converted MGM to a Trike that happened to us also.

We chased it back to the wire going to the shut off, was too short after all the modifications.

Added some wire and it hasn't failed since.

Tip over switch would have to have a hell of a lean in it to flip it off and as was said earlier, ya HAVE to cycle the ignition switch to reset it.

[58Woody]

A couple of good possibilities. Think that I examined the wiring harness from the standpoint of pinching the first time it happened.
(Anyone got a pic of the tip over switch?)

I do have to turn the key off  then on to restart.

[hubcapsc]

The tip-over switch is on the back of the hard-to-remove *&*$#!! center cover.

On this maintenance shot, I put  the tip-over switch back on upside down, and had to
remove the center cover twice... 

This is the only picture I have, and the switch is already removed, but you can see where
it screws on. There's a this-way-up arrow on the switch, by the way, so any idiot should be able to
install it correctly 



-Mike "pardon all that Texas that's still on my bike there..."

[signart]

Well, I have nothing to add but would like to say that is one gorgeous trike!

[Gryphon Rider]

A couple of good possibilities. Think that I examined the wiring harness from the standpoint of pinching the first time it happened.
(Anyone got a pic of the tip over switch?)

I do have to turn the key off  then on to restart.

So I suppose you could do an experiment.  Go to a parking lot with a sloped section, and do some U-turns, some starting facing down the slope, and some facing up the slope, getting progressively faster while maintaining a tight full-lock turn.  If the down-slope turns cause the shut-down, you have a good indication that it may very well be the tipover switch.  Perhaps the switch (#8 in this pic) is missing a screw and allowed to hang at an angle.  This would cause it easily shut off the engine when the trike is turned one direction, but not the other.

[58Woody]

I wonder if it would be a bad idea to just remove that switch ?

P.S.
    I have put her away for the winter. But I still have access to check it out.

[Bighead]

I wonder if it would be a bad idea to just remove that switch ?

P.S.
    I have put her away for the winter. But I still have access to check it out.

Wouldn't think so but you would have to figure out how to trick the bike into thinking it is there and upright.

[gordonv]

I would think it is either a normally open or normally closed switch. Triggering it would turn the engine off.

The big question is, would you want the bike to continue running/leaking fuel, in the event of an accident (impact might trigger it) or a roll over? Would the removal of a safety devise, make you liable for anything if in an accident?

[58Woody]

Liability........Hmmmmmmmmm.............................
Maybe that switch shutting down and causing an accident.................................
However good point you brought up..............that kinda stuff drives me nuts.

[indybobm]

I would NEVER, EVER suggest eliminating the Bank Angle Sensor. But for 'trouble-shooting' purposes here is how it works:

You would disconnect the 3P connector at the Bank Angle Sensor and jumper the Red/White Wire to the Green Wire.

There are two parts to the Bank Angle Sensor circuit. The first is the Bank Angle Sensor itself.  The second is the Bank Angle Sensor Relay.
The Bank Angle Sensor has an 'internal' relay which is not energized until the angle of the bike reaches a certain angle. This  'internal' relay, when unenergized, supplies a ground to the Bank Angle Sensor Relay through its Normally Closed contacts.  The then energized Bank Angle Sensor Relay supplies 12 volts through the Engine Stop Switch and Starter Button to the Starter Relay.

When the angle of the bike exceeds the allowed angle, an internal contact in the Bank Angle Sensor,  (think of it as a pendulum swinging side to side) supplies a ground to the 'internal' relay in the Bank Angle Sensor, energizing the 'internal' relay which opens the Normally Closed contacts.
This removes the ground from the Bank Angle Sensor Relay which de-energizes that relay and removes the 12 volts to the Engine Stop Switch, the Starter Switch and the Starter Relay.

The 'internal' relay in the Bank Angle Sensor is a latching relay. It will remain energized until the angle of the bike is corrected and the ignition key is switched off.

[58Woody]

 
The angle sensor is the culprit. The right side mounting screw is broken off. It was attached by only the left screw  and leaning at a 30 degree angle. Nice !  I will pull the battery and radio and either repair the mount or re-do it.

[Gryphon Rider]

I'm glad it was something simple, other than getting access to the switch.