Deep Well Float Bowl Nuts

Increase Float Bowl Capacity
 

Keihin Deep Well Float Bowl Nuts

Mikuni Deep Well Float Bowl Nuts

Deep Well Float Bowl Nuts were designed to store more fuel around the main jet, eliminating the potential of running lean due to fuel starvation. The Dial-A-Jet fuel pick-up is placed further from the main jet eliminating fuel cavitation between the two circuits. Deep Well Nuts are also a space saver allowing you to place the Dial-A-Jet, IntelAJet  or Thunder PowerJet fuel pick-up on the side of the nut rather than the bottom.

All deep well float bowl nuts are machined from billet 6061 Aluminum.
DJ-548 and DJ-549 also have diamond hardcoat finish with teflon coating.

DJ-540  -  Fits: 32mm - 38mm VM roundslide Mikuni carbs and TM 33, TM 42-48,
                TMX 42-48 and TMS 42-48      -   $14.95
                  Thread OD on Nut = .6245"
                  Depth (from gasket surface to bottom) = .82"

DJ-545 -  Fits: 40mm - 44mm VM roundslide Mikuni carbs    - $14.95
                 Thread OD on Nut = .8585"
                 Depth (from gasket surface to bottom) = .9"

DJ-546 -  Fits most Keihin carbs including most FCR carbs   -   $14.95
                 Thread OD on Nut = .6945"
                 Depth (from gasket surface to bottom) = .78"

Tech note:  The floor of the float bowl nut and main jet are so close to the fuel flow holes in the stock nut that a hard landing will actually force fuel out the flow holes, causing the engine to suck air under heavy load and resulting in extreme engine damage and failure.  We have moved the flow holes in the DJ-548 and DJ-549 so that this condition does not occur using these nuts.

DJ-548 - Fits: Mikuni 38mm and 40mm TM Rack style carbs (OEM on
             Arctic Cat and Polaris snowmobiles).  Also fits 38mm
             and 40mm TM Rack style carbs on Ski-Doo providing
             you have ample room for the extra length   -  $14.95
             Depth (from gasket surface to bottom) = .87"

DJ-549 - Fits: Mikuni 38mm and 40mm TM Rack style carbs
             (OEM on Arctic Cat, Polaris and Ski-Doo snowmobiles).
             NOTE: Due to engine placement on some model Ski-Doo's,
             only the DJ-549 will fit.  The inside bore is deeper in the DJ-549
             because it does not have an external bottom bore like the stock
             float bowl nut (see photo on right)   -  $14.95
             Depth (from gasket surface to bottom) = .3"

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