Studdering/Jerking at high speeds

[Knorma09]

I spent some time reviving my bike after allowing it to sit for several months. I replaced the speedometer, PCB hand controls, had to get it re-jetted. Now its running nicely except for at high speeds 60-70 mph and above. I experience jerking. Does any have any ideas what is causing this. Thanks

 

[Sven]

Anywhere from fouling plugs and/or too rich causing a stumble/jerking. Grab choke. If it's worse [jerking wise] then it's too rich. If runs better with choke then too lean.

 

[awg]

main jet my be off.

 

[Knorma09]

Anywhere from fouling plugs and/or too rich causing a stumble/jerking. Grab choke. If it's worse [jerking wise] then it's too rich. If runs better with choke then too lean.

I plan to replace to plugs and get new cables. I wanted to change the color anyways. How would I know if it wasn't the transmission slipping or something bad like that. Thanks

 

[Knorma09]

main jet my be off.

I brought to the shop and they went up a size I think on the main jet. I spoke to the mechanic who wasn't quit sure what it was. I guest because all the other problems I had was related to the main jet. Thanks

 

[awg]

Well you could drop the bowl and unscrew the main jet and see what size it is. If there not sure what they replaced, you should check it. Main I think should be a 76?