Jerky throttle cruising

[Sallison396]

So I haven't had my bike for long, knew it was gonna be a bit of a project when I bought it. She's a 81 400 special. I've noticed when I'm cruising in 2nd and 3rd ( haven't had a chance to get it on the highway yet) the throttle seems jerky. As in I'll be holding it steady and it seems like it'll get a little less power, then a little more, so on. This is while cruising around 4k rpm. Any idea where to start?

 

[BBS360]

Stock intake and exhaust?

 

[xschris]

Is the motor bucking even if you don't move the throttle? Or does the bike feels like it is bucking. Could be a slack or dry drive chain. Or out of ajustment carbs/motor. A lot of things could cause a jerking bike. If your not used to driving it or have little time on an older style bike it could be just that. Try riding at a constant speed/rpm and see what happens.

 

[NewHavenMike]

Its probably your hand vibrating off/on the throttle lol. Still happens to me sometimes.

 

[Sallison396]

The intake is stock, exhaust I'm not 100% sure but I do know the baffles have been taken out. The slack in the chain seems plausible, I remember thinking it had more slack than it should