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At least you haven’t got a flat spot! You have something like Main jet 112 Pilot jet 50 or lower say 45 Atomisers 260 BD or K Choke plungers OK - with the float bowls off you can attach some tubing to the choke jet and try blowing through. I once removed the choke jets and blanked off with appropria...

Air filtration and exhaust backpressure have quite a bearing on the correct performance of these bikes.

Main jets from Eurocarb are not too expensive.

My 83 K1 never does this. Had it since 2007. Main jet 112. Let us know jets, needle type and position when you get the chance. Mine did have dissimilar atomisers initially. Maybe a mod for nipping around the Colosseum? My atomisers were 260K but I drilled them to make them BD which I think are nla, ...

My K1 has a screw in stop switch in the brake lever perch.

That conversion is no bad thing either. Replacing a blade fuse is far easier than trying to get a conventional fuse back in between the contacts.

I think the main jet size did go up to 115 for a year or two then reverted to 112 prior to the K2 era. My K1 has been fine on 112. Everything standard—ish.
What atomisers are you running? Are the passageways clean?
The choke pistons as mentioned do degrade with an increasingly over rich condition.

Check the ignition switch- if it has been replaced you may find it will turn one more turn to activate lights. Anyway the Met office reckon we are due a long very hot summer which suits me. Good Morini riding weather and redundant lawn mowers.

I had to prod him initially as I made a mistake ordering but they did come eventually. That is a long time to wait. I was talking to some Italians on the French Morini Rally and if I had remembered I could have mentioned this . Well when I say talk I use broken Spanish….

Did you have the starter sprag out from the cover in front the clutch cover as there is a spacer inside the flexible coupling which may be about that size?

I am running a Concave Cibie on my K1 Sport with a Phillips H4 bulb. Seems reasonable and shows up deer loitering at the roadside, which is always a bit worrisome. I am running @flexi-stem” indicators from Vehicle Wiring Products. Much lighter than the originals- I only had two rear of Morini ones w...

From a previous thread. I run 112 in my K1 which is slightly earlier. I have dropped the idle jets, which reportedly improves off idle stumble, with which I agree. I also believe in keeping things as standard as possible otherwise.

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I fiddled about with my calipers yesterday. The inner pistons do move and you can press them back with a big screwdriver on the pads. They do not move quite as freely as the outside set. I tried shims recently obtained to try and equalise up the sit on the discs, which seems to have worked and had n...

I blame the sun- cannot see to type. Fixed now ta. I expect it is nearly dark up there…

I just looked hard at my twin brakes on the K1 and yea the inner face is very close. It’s only taken me since 2007 to notice.
Inners are .7 and .5 mm, but the outside gaps are nearer 1.3mm.
No damage to discs- yet.