Triumphrat

NorthernThrux

Had the bike tuned at a shop today after all my handywork and its running well. The one problem is that the Slow Fuel Screw is all the way in for the highest idle we can obtain. Bike runs well, but it means there is no room for adjustment of course.

The FCR shipped with a 55 slow fuel jet, Keihin part number N424-25B-055

The fact that the fuel screw is bottomed means I need a smaller jet. Question is, what size jet will get me into the sweet spot of 1 to 2 turns out from bottomed given my setup and assuming the current bottomed out configuration is the best ?

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2008 Thrux. Racetech springs and emulators front, Ohlins rear, FCR39 carbs @ R&D remote fuel screws, Zard Exhaust, Pretech 6 pot front caliper, custom tail, BC airbox removal and AI removed. Real HID replacement bulb hi/low, LSL Frame sliders.

NorthernThrux

And the answer, for those of you who care, was a #48 slow fuel jet, courtesy of my local HD dealer Rocky's.

This reduces the slow jet by the ratio of the radii of the two jets. The #48 has 76% of the area of the #55 (a 100 jet has a diameter of 1 mm I'm told). Now, when the fuel screws are turned all the way in, the engine rpm starts to drop (but does not shut down). The sweet spot seems to be about 2 to 2.25 turns out.

Must say I like the remote fuel adjusters. A lot nicer than burned fingers.

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2008 Thrux. Racetech springs and emulators front, Ohlins rear, FCR39 carbs @ R&D remote fuel screws, Zard Exhaust, Pretech 6 pot front caliper, custom tail, BC airbox removal and AI removed. Real HID replacement bulb hi/low, LSL Frame sliders.