Cruising on the slab the other day.
65 - 75 mph.
Cooler temps, in the low 40's (F).
I cannot help but notice the tach needle intermittently jumping 200 to 500 rpm- with me just holding steady on the throttle.
Flat road mostly, freshly repaved (nice).
A bit windy, about 15kn steady, gusting to 25kn.
Tach is electric.
I flip on my volt meter, it shows normal deviation in the 1/100's.
Nothing unusual there.
Roll on the throttle to 75 mph, tach needle climbs up like normal.
When I roll off, back down to 4K- there it goes again with the intermittent jumping.
I count seconds to see if it's a pattern. None detected.
Just every once in a while, sometimes 200, back to 4K, then a 500 jump, back to 4K.
Sometimes just 100 rpm jump.
Haven't looked to see if the connector under the seat is nicked or grounding yet.
Just wondering if anyone else may have experienced this odd behavior.
Or, if there's a short course on remedy available.
TNX in advance.