loosing rmps at speed

[DreKat]

Hi
I have a 98 Post 750 Kat and when traveling at a consistent speed of 60mps+ the engine will loose 300rpms every 5-10sec and it very annoying.

the bike starts and ides perfectly. Ive replaces the spark plugs and its still doing it.

any ideas?

[shpielers]

If it's only dipping a little bit, I would guess electrical gremlin. A fueling issue would likely not result in such a small drop. Check your could for arching?