The 6210-3 and 8679 carburetors have been designated and calibrated as direct “bolt on” replacement carburetors for 1965-1970 Chevrolet passenger vehicles (only) originally equipped with a Rochester Quadra-Jet carburetor. (Specific recommendations and descriptions for each carburetor list number are shown in the accompanying chart on the last page of the instruction sheet.)
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The Holley Dominator II Manifold, 300-36 has been designed for use on small block Chevrolet engines (265-400 C.I.D.). Its low-end torque and usable power range off idle to 7200 RPM makes it ideal for street and street-strip applications.
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Some 1988 GL1500s may experience a slight hesitation during light acceleration. This condition usually occurs just above idle speed. A carburetor kit (containing slots-jets, jet needles and vacuum pistons}, ignition control unit and carburetor control unit are now available for improved low speed driveability on affected GL1500s.
In addition. correct routing of the carburetor hoses and vacuum lines is necessary to ensure proper engine performance. Other driveability symptoms. such as idle fluctuation and afterfire, may result if the hoses and lines are pinched, kinked or loose. Pay special attention to the correct routing of flee hoses/lines described and shown in HIE bulletin.
Repair Procedure
- As part of PDI. test ride new GL1500s and check low speed engine performance. If the motorcycle has any of the symptoms noted above. perform the repairs described in this bulletin before release to your customers.
- The procedures that follow apply to both 49a State and California models.
- Carefully remove and install the plastic body parts and covers. Be sure ALL fasteners and tabs are removed or released first.
- Be sure ALL hoses arc routed as shown or described to prevent pinching or kinking. A pinched. kinked or loose hose may cause other symptoms that could contribute to poor engine performance. (Also refer to Service Bulletin GL1500s #1 for carburetor vent hose routing and vacuum fuel valve installation.)

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REMOVAL:
1. Disconnect the negative battery cable(s).
2. Remove the torque converter access cover and inspection plate.
3. Remove the transmission pan, drain the fluid and re-install the pan.
4. Remove the fill tube bracket bolt and pull the tube out of the transmission. Retain the fill tube seal. On 4WD models, it will also be necessary to remove the bolt attached to the transfer case vent tube to the converter housing.
5. Rotate the crankshaft with a pry bar from under the vehicle until the converter bolts are accessible.
6. Mark the drive shaft and pinion yokes for assembly alignment. Disconnect and remove the drive shaft. On 4WD models, remove both drive shafts.
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FRONT INSTALLTION INSTRUCTIONS
1. Block the rear wheels of the vehicle. Raise the front of the vehicle and support the vehicle with jack stands under the frame rails. Remove the front wheels and tires and set aside. Position a hydraulic jack under the front axle and raise the jack until the front suspension begins to compress.
2. On both sides of the vehicle, scribe alignment marks on the adjustment cam and axle bracket at the lower link to axle attachment point for later reference. See Photo 1
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These instructions have been designed for unaltered vehicles. Before you start, check for any variations. Each vehicle may dictate it’s own control mount and cable routing. Therefore, you will need to study the pictures and use your good judgement or seek professional help. Lift kits may govern how and where the cable is routed. Always keep the cable away from heat (exhaust) and rough or sharp edges. If you are concerned about lower cable damage or abrasion, we recommend cutting a length (about 3 feet) of 5/8” ID plastic or rubber hose (garden or heater) to be slid over the cable before assembly. Please keep in mind, the warranty is void on heat damaged or abused cables. Before drilling, check for any electrical wires, hoses, etc
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The AEM Performance Air Induction System is the result of extensive development on a wide variety of cars. It is the most advanced short pipe air intake system on the market. Each system is specifically engineered for its particular application. All AEM Short Ram Air Intake Systems deliver maximum performance gains through lightweight, all-aluminum, mandrel-bent tubing that is tuned in both length and diameter. The tube length and diameter are matched for each specific engine to give power over a broad RPM range. Unlike systems that use a continually diverging cross-section, we take advantage of the acoustical energy in the inlet duct to promote cylinder filling during the intake valve-opening event.
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