Best guess for main jet size?

Here's the deal:

On my '83 KZ1100LTD, I have a Kerker 4/1 exhaust setup

a set of PODs

Running 120 main jet

37.5 pilot jet

Air screws 1 3/4 out

synchronized carbs

Adjusted valves

Where I live, I'm operating at 3000 to 5500 feet elevation

Engine starts great, runs great, accelerates smoothly thru all RPM range, no sags, flat spots or hesitations.

BUT, the pulling power at full throttle from, say, 3500 RPM on up is rather mediocre - instead of WOWWWwww, it's HO-HUMMmmmm! I *know* this engine can pull stronger than this - the valves are adjusted properly, the compression is good, the engine has 27K miles, uses no oil, doesn't smoke, and sounds great mechanically.

I'm convinced I need a larger main jet than the 120's that are in there now, but don't have a "feel" for where to best go in a larger size for better fueling thru the midrange and upper RPM ranges - I'm thinking perhaps 140's, but need input from someone knowledgeable with setups like mine.

My plugs are reading right on for color, a very light tan, so really don't think I need to be looking at pilot jets or air adjustment - I have adjustable needles in the slides, and am running 3rd notch from the top - higher makes the plugs too lean - lower gets them sooty.

I'm open to other ideas from a knowledgeable perspective, but REALLY think my missing power is caused by too-small main jets - will someone edumacate me with informed input? :confused::confused::confused:

I have a 1000 and I run a 140/40 setup. It worked wonders for me. So I'm assuming maybe a 2 sizes up on the pilot and a few for main. I'm sure there's other guys that know more than me On here that'll have a good outlook on your situation.

Double post - sorry!

andler2008 wrote: I have a 1000 and I run a 140/40 setup. It worked wonders for me. So I'm assuming maybe a 2 sizes up on the pilot and a few for main. I'm sure there's other guys that know more than me On here that'll have a good outlook on your situation.

That's almost EXACTLY where I'm headed so far with my setup, allowing for our elevation that runs from 3000 to over 5000 feet, and dictates slightly smaller jet sizes - I tend to get sorta rankled with the guys who knock 4'1 pipe setups and PODS...

Fact is, the fuel induction systems on these bikes is hardly rocket science - nor are the Kawasaki designers and engineers any sort of "Gods", whose various systems cannot be modified, and possibly improved upon - and that includes the OEM airboxes and exhaust systems!

I have serious problem and disagreement with the notion that "PODS simply can NOT be made to function properly - and CERTAINLY not as well as the OEM setup"...

That's pure BS - and most likely all it takes is the proper mix of time, knowledge and resources to make them work, and most likely work BETTER than the OEM system they replace. And I sure hate to ashcan my own effort just because some pimply-faced high school kids with nothing more than a hammer and screwdriver weren't able to get it done!