Bikernet West – Mikuni Carburators to the Rescue

 

With Sturgis 2000 looming over Bandit’shead we’ve been firing away at the getting the job done. Bikernet Eastmachine was well out in front in the competition when we wheeled the Agent’slow slung Softail onto a slick Gold Rush semi and said goodbye as the rig,packed with Ultra machines, Big Dogs and customs from the west coast, headedeast. Eddie Trotta from Thunder Design was more than happy to have thebike unpacked in his shop in Fort Lauderdale, so he could point a fingerat Bandit’s creation for Agent Zebra and bust out laughing, “You expectto ride that to Sturgis?” he said rolling on the floor of his shop. Weweren’t discouraged and neither was Bandit as we strapped the road wingswheels, the Weerd Brothers Front end on the Daytec rigid and went to work.

Now with the sheet metal in place and Bandit,wiring his own bike, was finished, we were ready for the carburetor. Carburetorsare like booze, everybody’s got their favorite. With all the choices outthere, we had to give this choice some serious thought. We considered theperformance requirements as well as the appearance, and settled on a MikuniHSR 42. Hell, CCI installs Mikuni carbs on their complete Rev Tech enginepackages, and Mikuni’s are standard equipment on some OEM bikes. They providegreat performance, torque and tuneability, so that’s where we took theBandit’s Blue Flame. Lee Chaffin, Mikuni big wheel, suggested that we bringthe bike to them to insure the proper fit and installation of the cables.Joe Minton, a long time moto-journalist, was on hand to assist, and Bryana Mikuni expert performed the installation.

This was no ordinary installation. First,time was a factor, second it’s no normal, stock carburetor swap. The 98-inchS&S motor offered taller cylinders and improper intake manifold fitment.The stock Super E S&S manifold was too big for the 42 mm polished MikuniCarburetor. Stock manifolds shove the carb out too far and aren’t wideenough for the tall S&S cylinders so a quick call was made to JamesSimonelli of S&S who rushed the correct manifold to Mikuni. Lee alsowanted to explore an American Iron Horse manifold available for their customswhich pull the carb in closer to the engine and “L.T.” or James Littleof American Iron Horse moved equally fast and the parts were in hand inone day. The next hurtle: The cables. A call went out to Xavier at BarnettCables who turned about a set of Mikuni compatible cables which are setup the same as stock H-D cables, but cut to Bryan’s specifications forthe job. They also arrived in time.

Bryan decided to mount the choke cable tothe motormount, but decided that a super clean installation was necessary.He cut and re-connected the choke mechanism to fit the look of the bike.Then he reviewed the two manifolds, chose the American Iron Horse versionand detailed it on the polishing wheel. The final touch was a difficultdecision regarding the air box. We had a Little John Buttera velocity stackthat’s clean as a whistle, but the minds at Mikuni were skeptical abouta ride to the badlands with no air cleaner. They spotted a tear-drop K&Non one of their own bikes and decided that was the unit for the job. Easyinstallation, it slipped into place and the bike was good to go.

Bryan pointed out an adjustment on theleft side of the carb as you face it, a main jet air adjustment. He toldme to inform Bandit to turn it out a half turn in Denver for more compatiblerunning in altitudes. The bike immediately fired to life for the firsttime. Two weeks to go.

–Wrench 

 

 

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