750 Maxim butchered

A lean mixure will idle well.
Does she pop on deceleration at all?

 

she pops on decel only when I'm dogging her real hard. No tach so I couldn't tell you exactly but, I've gotta really be on that throttle in a lower gear.

Don't tell me that's bad, gives me a chubby when she's poppin' like that

 

If uncontrolled explosions in your engine/exhaust turn you on, wait til you see her hole. It's the one that will be blown in a piston if she stays for too long.

 

It's bad.
She's definitely lean on the pilot circuit. I recommend that you address the problem as soon as you are able.
When you pull the plugs you may find little balls of aluminum stuck to the insulator and ground strap. They used to be part of your pistons.

 

Haha

Gotcha

 

I honestly thought it was just dumping excess gas into the exhaust and it was getting burned up. Didn't think anything of it.

At the end of the day I'm no mechanic, I'm just a lowly fisherman trying to figure this bike stuff out.

 

Fishermen are far from lowly. The brother of a friend was lost recently in the Bearing Sea. Fishermen are awesome, and I deeply appreciate your efforts.

 

Sorry to hear that, luckily I work in sunny Miami, FL on a charter boat. Not much risk aside from lightning strikes.

I'll check the plugs on my next day off and post some photos.

 

So about drilling out the pilots to 45... how can I learn more about this?

Sorry for raising a dead post but I’m going thru my carbs again and figured I’d ask!

 

You will need a set af numbered drills (metric), a pin vice to hold said drills, and two hands. One hand holds the jet, the other holds the pin vice as you drill.
Slow and steady.

 

Great. Now, I’m able to find drill sizes for mains pretty easy but I’m only really finding one chart for pilots. I came up with .018 or #77 for a 45 jet. Is this accurate?

Any kind of cutting fluid I should be using or go in slow and dry?

Edit: the bike has sat for about a year at this point and just went thru the carbs again. The pilots are clogged and I can’t get them unclogged and accidentally ordered 2 sets of 42’s. So my plan is to drill out the old ones to maybe a 43? And one of the new sets to a 45 and play around with it till it seems right.

 

Get a metric set of drills. The jet sizes are in tenths of a milimeter.
45 main is 0.45 mm.
Your conversion to inches is the closest drill size that you find in inches, but it's still a tad large to make a true metric 45 jet hole.

The jets are brass. Brass is essentially self lubricating at typical cutting speeds. You will not be using a power drill. Drill by hand with a pin vice.

 

I genuinely don’t understand why you want to try 45s. Also, for as cheap as jets are, I would highly suggest ordering new set of 43s instead of drilling them. Drilling jets NEVER ends up at the precise size.

 

45’s were recommended to me by k-Moe earlier and so far all of his help through the years has been spot on.

And as I said earlier I accidentally ordered 2 sets of 42’s. I could just order a set of 43’s as well but they don’t make them in 45 (that I’ve found)

 

He is a great asset to this place in deed!
I am asking because I am at see level and my bike seems to run perfect with 43s.
Did you have any issues with 43s?

 

Haven’t tried 43’s yet only 42’s

 

Careful drilling gets the hole close enough that any differences can be compensated for with the idle mixture screws.
The big problem that people tend to run into when drilling jets is buying crappy drills, using a power drill, and not having any practice drilling a straight hole by hand (cut slow, cut steady, and cut straight. Speed tends to make the hole oval, and can cause the cutting edge to chatter or leave a spiral along the bore wall ).
A jeweler's lathe and a boring bar (more like a boring pin) will do a better job, but the difference is neglegable as a practical matter (and the cost is ridiculous).
If a factory-made jet of the required size were available that would be preferable, but it's often the case that odd sizes are not (or even never were) in production.

 

@k-moe any tips for cleaning the tubes the emulsion tube sits in? I been sitting here scrubbing it with a brush and carb cleaner for a half hour I still see a bunch of fuel varnish. It’s only bad in 2 of them. Very close to wrapping the brush in steel wool and going to town.

 

B-12 chem tool and Q-tips. Using a long nose pliers to get all they way though that tube. Works great IMHO.

 

The carb bodies need a soak. Be sure to follow the directions on the can of carb dip.

DO NOT use steel wool. You'll never get all of the fibers out, and some bits of them can get imbedded into the aluminum.