Harley Davidson Electra Glide FL/FLH, Super Glide FX/FXE/FXEF/FXS (1978 1/2 to 1980). Service manual — page 4

Figure 3-43. Lapping Pinion Shaft Main Bearing Race

Assemble lapping arbor to lapping handle and assemble guide sleeve to sprocket shaft bearing bushing. Sleeves for use with tapered bearing, are assembled to case with bearings and small spacer collar. Turn sleeve parts finger tight.

Insert lap shaft with arbor assembled through pinion bearing bushing and into guide sleeve. Tighten arbor expansion collars using a length of 5/32 in. rod as spanner until arbor begins to drag. Do not adjust arbor snug in bushing or bushing will “bell/' a condition where hole is larger at ends than it is in the center.

Withdraw arbor far enough to coat lightly with fine lapping compound. Do not apply a heavy coat. Reposition lap in bushing and turn handle at moderate hand speed. Work lap back and forth in bushing as it is revolved to avoid grooving and tapering.

At frequent intervals, remove lap from crankcase, wash and inspect bushing. Lapping is completed when entire bushing surface has a dull, satin finish rather than a glossy, smooth appearance. If necessary, flush off lap in cleaning solvent, air dry and apply fresh, light coat of fine lapping compound.

FITTING PINION SHAFT BEARING

The fitting of pinion shaft bearing is done in much the same way as fitting lower rod bearings (see "Fitting Rod Bearings"). A plug fit is first determined using the pinion shaft that will be used on engine being overhauled, or spare shaft of exactly same size. When a plug fit has been found, pinion shaft will enter bearing slowly under its own weight, will turn with only a very light drag and will have no perceptible shake.

A running fit is determined from a plug fit by subtracting
one half the desired running fit clearance from the size ol the plug fit rollers.

Example:

Running fit clearance is 0.0005 to 0.001 in. loose. See "Engine Specifications," Section 3. If a plug fit wa« achieved with 0.0006 in. oversize rollers, subtract one half running fit clearance from plug fit roller oversize. Use figure representing middle or average of tolerance span, 0.00075 or 0.0008 in. One half the average of tolerance (0.0004 in.), subtracted from roller oversize (0.0006 in.), indicates that 0.0002 in. oversize rollers should be usee to produce a suitable running fit.

Oversize rollers are available in 0.0002, 0.0004, 0.0006, 0.0008 and 0.001 in. sizes. All calculations should therefore be made to nearest available even-numbered size. In the ex ample above, it would be possible to arbitrarily decide upon 0.0006 in. as a running fit rather than the 0.0008 in. il desired. Final decision would rest largely upon intended use of motorcycle. For highspeed work, the more free fit would be better, while the closer tolerance is suited to road use at average speeds. This consideration may be made in fitting all tolerances.

All fitting must be done with bearings that are clean and dry. Oiled surfaces will take up some clearance and give a false reading.

FITTING SPROCKET BEARING

If flywheel end play is within tolerance and if Timken tapered roller bearings and races pass visual check and have no apparent wear, the same set may be reinstalled. Make certain all parts of bearing are installed in exactly the same order they were removed. If any part of bearing assembly is worn, entire assembly should be replaced.

ASSEMBLING CRANKCASE (Figure 3-31)

Install flywheel side outer race snap ring (12) in case. When properly installed, oil hole in snap ring groove will be centered in snap ring gap. Use arbor press and Outer Race Press Plug, Part No. 97194-57 to press outer race parts into crankcase bushing one at a time. Press the races into the case, one from each side, with the widest ends outward to match taper of bearings. Be sure each race bottoms on the snap ring.

Position flywheel assembly, sprocket shaft up, in vise with copper jaws. Press bearing (15) on sprocket shaft using Bearing Installing Tool, Part No. 97225-55. Sprocket shaft spacer 24036-66 may be needed with bearing installing tool as shown in figure 3-44. Press the parts on using sprocket shaft spacer as a pressing tool only. Turn tool screw onto sprocket shaft thread and tighten securely. Remove tool and slip the bearing, small end up, over sprocket shaft, starting it squarely. Install the small bearing spacer (10) and tool sleeve and press bearing against flange on flywheel

FUEL SYSTEM
CARBURETOR

DESCRIPTION

The Keihin carburetor is a horizontal, gravity fed type with a float operated inlet valve, an accelerating pump, a throttle stop screw for low idle speed adjustment, and choke system with a high idle speed adjustment.

The high idle speed cam operates in conjunction with the choke to progressively raise the idle speed as the choke disc closes.

CAUTION — This carburetor has been designed to control exhaust emissions. Any carburetor modifications or adjustments other than specified in this section may be in violation of Federal or state regulations.