So my bike is running pretty good except when I hit good size bumps when doing 45mph and up. Doesn't seem to do it at lower speeds.its just annoying when it's one bump but if I am going through a rough section it gets pretty bad.. I have recently replaced my coil cause my bike was shutting down to one cylinder.. Haven't had an issue with that since I replaced it.. Any help on this issue would greatly be appreciated. My bike is a 96 fxd ev27 cam and arlen ness big sucker intake. Thank you

 

under the center of the bike it has a netted cable ground wire - it connects to the inner primary center bolt from the back side and it attaches to the frames cross brace - the weight of it after many miles has a way of making it loosen the bolts - remove it completly Clean both locations and re install - that is your isssue

 

Thanks for the quick reply.. I will remove and clean that when I get home from work

 

do u happen to have a picture of exactly where this wire is?

 

Also, with the bike running, (carefully, wearing gloves if you have to) grab the wire coming out of the cone and going down and tug on it. If the motor dies, that wire is broken inside the insulation.

 

Ditto Dr.Hess but also advise you do this " wiggle " test to all the wiring on this 19 year old . If your up to that you can also inspect / clean / lube any and all switches , breakers , connector blocks etc. to ensure your electrical system is good to go.
Older bikes are great but the old wiring is usually what will make a bad day.
Take care the electrical and you will have one less BIG thing to worry about.