I had an '85 manual that bucked almost every time I passed through the
2800 RPM mark. It ran fine everywhere else. After cleaning a lot of
grounds, replacing old sensors etc, it turned that a new ECU fixed the
issue completely.

If you have one available (I bought mine for $50) it's a quick check
that could save you a lot of time.

- Aaron

On Nov 3, 2008, at 9:30 AM, craig cowan wrote:

> Hello guys.My '85 is running so astonishingly well, i have nothing to
> complain about except that it tend to buck a little at or just above
> 2K rpm
> if you hold it there for a considerable amount of time while the
> engine's
> warm. It's ONLY at the 2000-2200 RPM range though. I thought it was
> the AFM,
> but i put in a spare and the symptom is exactly the same. I don't
> know that
> the spare's any good, but the fact that the symptoms are exactly the
> same
> has me thinking that's not it. So what do you think? Temp 2? O2?
> Throttle
> Position Switches?
> Any thoughts? I have really no running issues aside from that
> bucking from
> time to time at that specific RPM.
>
> -Craig
> '85Westy