1994 evo 1200 (bike stalls)

[Gone]

Bike has 2000 miles I just bought it Idles perfect I put about 80 miles on it last week end ran great until the end of ride . At higher RPM the tach goes whaky and it starts to hesitate or stall when I let off the throttle it idles fine took it out last night rode a couple miles ran good then started to act up again same thing tach gone whacky and stall like but idles perfect HELP PLEASE!!!!!!!!!!!!!!! 1994 XL1200 EVO

[sportysrock]

Corrosion in your ignition cone maybe? Loose battery connection?

Seems like an electrical issue.

[Big-Ed]

Originally Posted by sportysrock

Seems like an electrical issue.

+1 on that, sounds like it may be electrical..

Maybe the coil might be letting go & breaking down under the higher rpm strain...

Also, maybe a spark plug going bad with the higher rpm strain??...

[94Sporty]

Sounds like a vibration problem affecting the electrical. Mine did the same thing at about 3000 to 3500 rpm. Turned out to be the ignition switch. Also check for loose connections (especially battery cables), circuit breaker, kill switch on handlebars. Roger

[m.breen]

Same thing happened to me on my 1993 sportster. It was a loose battery connection, positve side if I remember correctly, really had to crank that bolt on tight.

[vlmuke]

+1 on loose connection anything that works intermittantly or goes whacky first thing is to check for a loose connection somewhere

[CharlieB]

Wacky-tachy... suggests lack of 12v going to the positive side of the coil - OR - the sensor under the nosecone has an issue, or its wiring does.

This isn't really brain surgery. Your eyes may just be your best troubleshooting tool. Look for green (corroded) connections and or plugs. Look for something out of the ordinary - such as - previous owner did some sort of splice that isn't too Kosher.

First thing I'd check, is the Deutch connector under the frame, amidships. If it goes bad, you lose all ignition and tach.... hmm sound familiar (ask me how I know). Take it apart, make sure no water has gotten in there (er... its under the frame where ANY road water will douche it). After that, check the screw down connections on the coil, then battery + wire, both ends. Check to make sure the breakers under the seat are well seated, and that the sockets haven't gone green and corroded. Check the BIG plug(s) at the steering head for corrosion.

You may just want to pull the ignition sensor cover (end of the nose cone), and have a peek inside. Maybe get a new seal for it (cardboard like thing... double up on 'em, works better).

[jharback]

Originally Posted by 94Sporty

Sounds like a vibration problem affecting the electrical. Mine did the same thing at about 3000 to 3500 rpm. Turned out to be the ignition switch. Also check for loose connections (especially battery cables), circuit breaker, kill switch on handlebars. Roger

+1
This often turns out to be a battery cable. They're infamous for causing these type of problems. Get a wrench on both ends, don't just wiggle it with your hand. BTW, welcome to the forum.

[99hugger]

mine did something similar too. mine was a wire in the harness under the tank grounding out on the frame. right on the bolt where the back of the tank slides under. previous owner had a splice job going on in there and even tho it was taped up the frame still has enough current to short it out. I taped the hell out of it and its been good to go since.

[jharback]

Originally Posted by 99hugger

mine did something similar too. mine was a wire in the harness under the tank grounding out on the frame. right on the bolt where the back of the tank slides under. previous owner had a splice job going on in there and even tho it was taped up the frame still has enough current to short it out. I taped the hell out of it and its been good to go since.

When you have time get some heat shrink tubing. Works like a charm.