GL1000 Float Bowl Gasket Issue

This Advisory issued: May 6, 2008

(notice sent via monthly eNewsletter dated May 6, 2008 to 6,000+ email recipients – including every customer who’s ever made a purchase at Randakk’s Cycle Shakk)

Honda GL1000 float bowl gaskets are one of the few items in my GL1000 Master Kit that I do not manufacture myself.

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Air Jet Mix-Up Problem

You might consider this item: Randakk’s GL1000 Carb Rebuild Video

Note dated 11/17/2008: The folks at Clymer’s are apparently not listening. Roger Gerson and Jim Morrison recently reported that their copies of Clymer’s GL1000 Manual (Fifth edition, 23rd printing – July, 2004) still perpetuate this mistake. It’s safe to assume that all versions up to this point have this error!

I mainly use the official Honda Workshop manual as my technical reference “Bible.” I occasionally look at Clymer’s or Haynes for cross-reference. Recently, I was reminded of a serious, long-standing problem with most (all?) Clymer GL1000 workshop manuals. This “typo” can cause serious distress if you rely on the misinformation when rebuilding your carbs.

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GL1000 CV Slide / Cap Variations

This material is covered in my GL1000 Carb Rebuild Video, but just in case you haven’t made that great investment… 

The plastic “buttons” on the GL1000 carb tops are not separately replaceable. They are swaged into the tops during manufacturing. Here are your options for a broken carb top plastic “button.”

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GL1000 Carb Code Location

This is covered in my GL1000 Carb Rebuild Video, but just in case you haven’t made that great investment…

Here’s a photo showing the location of the all-important GL1000 Carb Codes:

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Emulsion Tube Variations

You might consider this item: Randakk’s GL1000 Carb Rebuild Video

Emulsion tubes are perforated nozzles designed to pre-mix fuel and air for subsequent metering by the main fuel jets. Sometimes these are also called:

  • Main jet nozzles
  • Main jet holders

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Error in Official Honda GL1000 Shop Manual – Jetting Specs

Thankfully, the official Honda GL1000 Shop Manual is not riddled with errors like the Clymer manual, but there are two known “typos” in the Fuel System chapter of the Honda manual (at least in my copy which has a July, 1978 print date).

Honda made two mistakes in the chart printed on Page 9-2:

  1. ’75 slow air jet (idle air jet) listed as #125….should be #110
  2. ’77 secondary main fuel jet listed as #125….should be #120

Lean vs. Rich?

Carb Adjustment, Lean or Rich

Experienced wrenches sometimes forget that we operate with a set of understandings that becomes so ingrained as to become second nature. I don’t normally rely on gizmos like the K&N Air Fuel Monitor shown on my supercharged GL1000 (above). But since things happen so quickly on that bike, it’s a useful and entertaining tuning aid.

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GL1000 Plenum Leak Testing Method for Air and Fuel Circuits

This Tech Tip is an abbreviated version of material I show in detail in the GL1000 Carb Rebuilding video. The pictures are mostly self-explanatory.

I like to do each of these tests twice: once before the rebuild begins to help me understand what I’m likely to find inside the carbs and again when the rebuild is nearing completion to check the work.

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Intake Runner Leak Testing Method

This Tech Tip is provided courtesy of Fred Reckling of Las Vegas, NV.

In my GL1000 Carb Rebuild video, I show the method I use for testing intake runners for hidden leaks. I uses rubber stoppers and a vacuum pump for this testing. My method works very well, but sometimes folks have a challenge finding the right size rubber stoppers and the hose barb needed to duplicate my rig.

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Replacing GL1000 Air Box Gaskets

This Tech Tip is provided courtesy of Howard Halasz – noted early ‘Wing Guru. Howard is a frequent contributor of technical columns and other information to GWRRA’s Wing World Magazine.

“Many times when the GL1000 air box is removed for carburetor repair or other repair, the rubber gasket becomes damaged from being rubbed or scraped against the top shelter. The following shows how to replace your damaged air box gasket.

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