[homebase1]

hey guys
maybe one of you can HELP ?
the problem is with a 1981 GL1100 while ridding @ 65 MPG THE BIKE STARTS TO SLOW DOWN when trying to acceratethere is a strange noise from the motor as if its not firering on all cylinders, after stopping at the traffic lights it cleares untill about 65mph and starts to missfire again . could be coil??? any advice would be welcome
thanks
brian

 

[budoka]

Sounds ignition related to me, but I'm not the brightest bulb on the tree here. I'd check the most obvious first: plugs, plug wires and caps, and carbs too. Not sure on the ignition set-up (pretty sure it's electronic/no points) but there's some peeps here with more brains than I so someone will add to the list for you. Welcome to the place BTW.

 

[detdrbuzzard]

also drain the crank case breather overflow bottle. 1100 wings do have electronic ignitions so you could have a bad cdi box / pulse generator

 

[Kimswang]

Fuel filter.

 

[Steve F]

Sound like you bike is starving for fuel.

 

[Ron Robertson]

If it was a 1500 I would check the fuel filter first. Check the easy stuff first.

 

[Cantankerous]

What does the bike do on hard acceleration? If it stumbles, you probably have a bad fuel filter.

 

[Hornhonker]

Do the carbs sit in rubber boots ? I'd bet the boots are cracked and
air is leaking in causing a lean condition. We see that a lot with
gray market import bikes from Japan. i.e. VFR 400 etc. IF the boots
are more than about 15 years old they are suspect.

A fix is new boots or as one local here uses liquid India Rubber. Coat
the old boot and let dry. Reinstall and go.