Stutter at Cruise?
 

My 1990 3YU has what seems to be a stutter when at a constant speed. No effect when accelerating. Is this the secondary carb? Vacuum slide mechanism? I've just replaced oil filter and oil, air filter, and cleaned the carbs. I also replaced the carb intake boots to the head as they had become seperated. Any Idea's?

My 87 is doing the same thing. Let us know how you make out. I'm gonna pull the carb again and check all the settings.

Hi
This has been a common problem for me on my 86 Tenere for years, give the carb a good clean out and readjust the secoundry carb, and if you have them change the fuel filters. This works for me every time. I do this every six months and have no problems.
Also check the gap on the spark plug, some thing a lot of people forget to do on fitting a new one.
And make sure the air filter is clean, if dirty this will affect the running at lower revs, but not so much when you rev the engine to pull away or at higher revs.
Hope this helps Skip