MaxMidnight is directing you to the easiest way to attempt to correct the issue, 'the Shotgun.' If that fails to clear the pilot jets you may need to remove the carburetors, the float bowls, and the jet blocks, to access the pilot jets, and to soak the carb pieces in an ultrasonic basin.
Briefly the false gas tank cover needs to be removed, the airbox needs to be removed, and the rack of carburetors has to be removed and the easiest way to disconnect the carburetor control cables is at the oblong nylon Box about a foot up the cables from where they are hooked to the carburetor rack throttle actuation mechanism. Splitting the carburetor rack into two pairs allows you to easily remove the float bowls and then you can access the jet block which has two brass carburetor jets in it the smaller of the two with the pilot jet is the one that normally gets clogged as it is the smallest orifice in the carburetor passageways. Be sure to use a narrow with slot head screwdriver that fits tightly in the female slot in the brass pilot jet so that you do not break off the brass female end. The best way to clean your carburetors is with an ultrasonic cleaner. Removal of the jet black allows you to access the two brass Jets and to make sure that they are see-through clean. If this is your first time and I assume it is I suggest that you use your camera to take pictures at every step that you're doing and take notes as well.
https://www.vmaxforum.net/threads/vmax-newbe-longtime-biker.53821/#post-539262
You should look inside the gas tank and see what it appears to be. It should be shiny metal if you see any rust at all then you have to look into cleaning out the rust and then lining the tank . There are several different solutions that you can use but you have to follow the directions to the letter! If you fail to do that then the material does not stick.
I'd say that when everything was fine before and now all of a sudden you are developing blocked pilot jets, you definitely need to examine the tank. There are fiber optic cables that you can use with cameras that point directly ahead & to the side. You can hook that up to your phone or there are units that have their own LED screen. I have one and it works well.
Use the fiber optic scope down the gas tank filler and also remove the fuel level sender and then scope through that hole in the bottom of the gas tank also.
https://ia800204.us.archive.org/14/...ice-manual/yamahavmaxvmx12-service-manual.pdf
Another factory service manual, same thing, different numbering of the pages:
https://data2.manualslib.com/pdf7/1...x12_2001.pdf?78d960b0d2fbe67346bfd7a39ef24837
More posts for you to read:
https://www.vmaxforum.net/threads/poor-running-at-low-revs.54258/#post-543143
If you decide to purchase replacement carb parts,
Do not buy the ebay all four carburetors replacement parts in one kit! These often don't have the correct parts. You will be doing your carburetors more harm than good trying to make these work!.
To help you become familiar with your carbs, start reading this at #1, and read all the posts to the last one. Pay attention to the parts sources listed.
https://www.vmaxforum.net/threads/carb-kits-questions.52635/#post-528910
If you read all these posts, you will have a much-better understanding of the in's & out's of the fuel system.
Traumahawk assumed
dannymax's carburetor rebuilding business, and sending him a P.M. on here about a particular question, parts availability, or carburetor rebuilding services is one avenue of help on here.
CaptainKyle at
[email protected] and Sean Morley
[email protected] are other members offering carb work, parts, and more.
