I have a rebuilt 998 engine with 1275 head and twin HS2s. Whatever adjustments I try on the carbs the engine will either not tick over at all or ticks over at 1300-1400 rpm initially but slowly, very slowly, the revs drop to about 800 rpm. I have checked for airleaks around the manifold and I have serviced both carbs. I have also made sure the carb pistons move freely.
The wisdom of the forum with thoughts on a solution would be very much appreciated.
I do hope everyone is keeping safe at this difficult time