Unfortunately, most cars look like that. I have found either people take good care of their cars or they don't. Not much middle ground.
Imagine their house.
We have two 'farm vehicles' on the estate. Basically whatever is a 4X4. And they have loads of crap in them - lamb wool, dog hair, animal food, fencing eggs and wires, feathers, crusty stuff, sticky stuff, oil, fuel, all the tools we need, etc etc. When you open the window, dust flies out of it. Do not get inside if you aren't wearing work clothes.
In other news, I got this thing running...but that's all it's doing. When you hit the trigger it flies to 7200 instantly(so at least I know the porting is good), but it sticks at 7200 and won't budge. I can give it like 1/8 throttle and it will start to rev slower for a bit, then it shoots to 7200RPM. So some sort of ignition issue. I'll try it with the other flywheel tomorrow. I think the coil is bad or too close to the flywheel(it looks super close). Or maybe the coil didn't originally belong to the flywheel on the donor saw. I have a red coil here and the stock coil on the new Makita, but these are usually used with the smaller plug. I ported the cylinder with the BPMR7A in it - the larger saw plug. Gonna ask Andrew some Q's.
First heat cycle, and this crazy thing is idling at sumfin like 2400rpm, like my 288XP! Chugging right along. I have her at 2900 without cutting equipment now. Should idle well with it all attached then.:
ANd I've added a few pics of how I ventilated the top cover. Aside from those holes, the air seems to only enter via the tuning access holes. The holes in the last pic are hidden under the top cover. You can't see them unless the saw is upside down. In total it is 40, 1/8" holes. About 1.8 inches or so of more area for air to flow, and hopefully small enough most saw dust won't get in.