The repair on the dome looks good to me. I like the pre-filter idea! Are you using the Tupperware just to mock everything up or is that the actual air box? Might be tough to get a good seal on the lid.

Yes that's it.Pilot has aftermarket large gas tank that takes up the space where stock air box went.Is the seal that Important? Airbox is mostly to keep filter out of the rain or splashing from puddles

That's a good point & I agree. I overthought it with the pre-filter setup.

Those aren't plug chops ---- you have to cut them.
You are looking for a smoke ring at the bottom of the porcelain.
I believe you want a 1mm smoke ring. PM adnoh or use the search box.
Those plugs look lean to me.
CO

Not going to bother adnoh,if he saw the other post and chimed in he would do the same here if he wanted to.
Thanks for responding though,beginning to wonder if I was being blackballed since no ones responded to my post in this thread for a while

Is plug pic shown on the screen the actual color, sometimes the flash or fstop on camera will make the plug look lighter in color that the actual color. The color here to me looks lean.
I found I get a good reading of what the airfuel is doing by running at least 30 seconds wide open.
Can you go back to your original leaking carb to get a (somewhat) baseline for comparison...

what gas are you using? I'm like CO and strongly advise the use of a high octane fuel, AV gas is your cheap race gas, you may not get as much power as a true race gas but you will reduce the chances of cooking the top end.
also, you can get a bore scope camera from Amazon or Ebay for less than $30, stick it down a plug hole so you can get an idea of what the piston is looking like without pulling it apart.

Yeah the site is almost ded.
The few that are left are not posting much anymore and are probably just trolling (looking but not signing in).
I love this site and it's the homepage on my computer.
I try to comment on almost everything to keep the site alive and I am sure most are sick of my comments but that's why I do what I do here.
It's unfortunate but all things grow old and die eventually.
CO

Advertised compression ratio was 6.2 to 1 in the manual.

As for the fuel thing (oh god am I gona do this again LOL) I only run AV fuel because it solved Engine explosions for me. I blew 9 pistons in a row before I figured these FL350's out. At least twice it never made it 100 yds before it blew up (NO LIE).
The FL350 and the FL400 are two completely different animals. It may not seem like it but they are.
There are members here who have blown engines on the FL400 and when they switched to AV fuel all premature Engine deaths ceased. Engines must be in fine tune condition to run as advertised. These things are 34 yrs old now and I bet very few are in fine tune condition. That leaves the door wide open for the grim reaper.
CO

It's almost impossible for us to help on this issue unless we can hear it.
I bet money that it is probably your belt slipping on the clutch because it is worn out.
This would sound like a chirping or even a bad rattle (like it did on my machine).
Measure your belt width.
This would also fall in line or look like a jetting issue because of no top end.
How badly are your shivs worn ??
That's all I can think of right now unless I hear it.
CO

I know those comet 102 C clutches Can make interesting noises, did you do any work on the clutch, I know you were asking about lubrication.