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Randakk carb rebuild video errors Video copyright 2006 |
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| Pretty obsessive about keeping cylinder-oriented parts together. | An experienced mechanic knows the difference between parts that need to go back together in original orientation and those that don't. There is almost nothing on a carburetor that is like that. |
| Mistakes float bowl vents for vacuum circuits. | The brass tubes on the air filter side of the GL1000 carburetor are float bowl vents. This is automotive technology. |
| Not enough emphasis on float bowl screw threads. | One of the top three issues on these carbs is stripped float bowl screw threads. Repairing them is part of a rebuild, and the issue begs for advice on detection, prevention, and repair. |
| Fails to warn about bypass pucks falling out. | Unlike all other Honda carburetor models, the idle bypass port covers ("pucks") on the GL1000 carb bear careful attention because they easily fall out. |
| Uses pliers on float pivot pins. | You never want to do this. It ruins the pins and increases the chances of snapping off the pivot posts. |
| Calls air bleeds "vacuum ports". | They're not. They are air bleeds. |
| Calls mesh screens "flame traps". | Nope. They are hardware traps. |
| Promotes rebuilding carbs while leaving them in their two banks. | This is a false benefit. You cannot get to everything that needs attention if the carbs are not completely disassembled. Moreover, leaving the chromed guards attached prevents proper reinstallation of the carburetors. |
| Relies on compressed air to confirm circuit cleanliness. | Professional rebuilders use liquid, not air, to confirm circuit flowability. |
| Very cheap, Harbor Freight type screwdrivers in evidence. | Carburetors not only demand high quality screwdrivers, they even require custom-ground ones. |
| Doesn't grease o-rings. | A peculiar oversight. |
| Tightens plenum screws by hand. | The Phillips screws that bolt the air chamber ("plenum") together need gentle tightening by impact. |
| Suggests testing ignition coil secondaries cap to cap. | This is incorrect. The caps are tested separately and the coils are tested separately. |
| Promotes Marvel Mystery Oil, most harmfully as a vacuum top lubricant. | First, it is no good and actually harmful to the engine. Second, it also is bad for the carbs as it hastens carbon formation. |
| Does not grease linkages. | Minor, but it needs to be done. |
| No grease or glue on plenum center gasket. | The plenum center gasket benefits from a slight amount of sealer or grease. The plenum halves are not perfectly machined and their surfaces are very narrow. |
| Does not press in idle air bleed elbows. | The brass idle air bleed holding elbows fall out of the carbs unless they are properly pressed in. |
| Calls GL1000 ignition coils "anemic". | They are not. They are actually very powerfull and were used as hot rod coils on Honda inline fours back in the day. |
| Says felt throttle shaft seals are not available. | The felt seals probably became available before this video was produced, though that may not have been widely known. Motorcyclecarbs.com (now out of business) in Atlanta had them. Since then several other sources have also emerged. |
| Says dip cleaning carbs ruins felt seals. | They may somewhat from repeated rebuilding. But they also deteriotate from age. Most importantly, the seals don't do anything important anyway. |
| Bolted down manifolds before attaching cables. | Bad technique. The cables and the aircut valve are much easier to install with the manifolds not yet bolted down and able to be slid from side to side. |
| The vacuum gauges shown have water contamination. | One of the drawbacks of using mercury manometers. |
| No torque wrench use in evidence. | Very unfortunate. The manifold bolts in particular need a torque wrench. |
| Fails to blip throttle between sync adjustments. | This is known and practiced by every knowledgeable mechanic. |
| Uses an inaccurate method of measuring float level. | The most accurate method is with the carbs in their operating orientation, i.e. right-side-up. |
| Overly-aggressive vacuum top bronze bore burnishing. | While the bronze bores in the vacuum tops do need to be cleaned, burnishing them heavily is ill-advised. You don't want them to become looser-fitting. |
| Describes tops and slides as factory-matched. | This is a fallacy. Just because Keihin (and therefore Honda) made them available only as a set does not mean they were "matched". This perspective would have the packing set parts matched simply because they are available only in a package, or needle jet and jet needle, or any number of parts that retail combined with other parts due simply to vendor contracts and because of any matched parts ethos. This effort is commendable and may actually help folks. But it will also ill-inform, and we who posit ourselves as authorities are obligated to get it right much more than are others in the industry. |
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For more powersports maintenance fallacies, see this article.
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