Wing tips #6
Posted: Thu Mar 15, 2018 8:08 am
The ballast resistor
Honda used a part on the GL1000 that came from the auto world, the ignition ballast resistor. Not too surprising, considering that Honda's auto division designed this engine. In fact, consider how many -600 center codes there are in the GL1000 engine's part numbers, a number that was at the time of the Wing's intro reserved for the company's car parts. It's very revealing. The interesting thing about the ballast resistor is that its original purpose on '57 Chevys was to combat ignition coil voltage loss at high engine rpm, a weakness Kettering ignition is famous for. The resistor was supposed to block voltage input into your dad's car at low vehicle speed, conserving it for later use when the ignition really needed it at higher speed. Thus its name. It ballasted energy. A neat idea, but ballast resistors actually have been used in other roles as well, and this includes the GL1000. You may be aware that on the 1000, the resistor is instead used as part if a two-voltage starting/running system. During starting, the resistor is bypassed, allowing the full 12 volts to the ignition coils, but once running, the coils are fed through the resistor, receiving only 6-8 volts. It's a goofy system actually and completely unnecessary, and somewhat typical of what happens when the two galaxies -- powersports and automobile -- collide as they did in the GL1000. Happily, for almost 50 years I have been defeating the GL1000's nonsensical ballast resistor and opening up the spark plug gaps 10 percent to suit, on nearly every GL1000 I have serviced during that time. Improves carburetion. Doesn't hurt the points. And doesn't even begin to hurt the coils. In fact, GL1000 ignition coils are designed to withstand the stress. Back in the day we used to put GL1000 coils on 750s, un-ballasted. Kind of a quasi-factory, period high performance option.
The driven flange/moly grease debacle
Most folks are aware that GWRRA's Wing World magazine ran an article by then-tech editor Joe Christian which "exposed" the GL1100’s severe final drive flange wear. Honda in response initiated a temporary warranty extension (three years, 50,000 miles) on the part and published a special revised rear wheel assembly procedure designed to increase the life of the assembly, later applying it also to their V4-powered shaft drive bikes. As icing on the cake, the company also added a corporate office tour just for GWRRA members, and I was privileged to not only be a GWRRA member at the time but also a corporate Honda employee and thus found myself in the enjoyable role of tour guide. Cool deal. But I digress. Many have insisted that the swingarms were the real problem, being made wrong (I actually saw some techs reweld them to good effect, and Christian had angles and metrics all sketched out in his articles), and blamed Honda for taking the easy way out via the alignment procedure. Maybe. The fact is, the special technique does work, and the driven flanges so treated do last longer. And here's an interesting fact: the success of the warranty extension may have been due as much to the new procedure as to use of the then-new Honda moly (molybdenum disulphide) grease introduced specifically for this problem. The grease was really unusual. Unlike most greases labeled moly this was the real deal: 40 percent actual moly by volume, later increased to 60 percent, and good enough and rare enough that even the BMW guys were gleefully using it for their troublesome K bike transmission splines. A success story for sure, but now things get murkier, for inexplicably, Honda has discontinued the grease, replacing this remarkable and unique product with a run-of-the-mill moly-based assembly paste, good in its own right and similar to what BelRay and others have offered for decades, but like the BelRay product a mere engine assembly lube, not a high pressure lubricant that will stand up to the unique requirements of the Gold Wing's final drive. Unfortunately, the original Moly 60 is no more. The Honda part number simply supercedes to the wimpy replacement product. Owners of Honda and other shaft drive bikes are left searching for a new source of flange grease.
Honda used a part on the GL1000 that came from the auto world, the ignition ballast resistor. Not too surprising, considering that Honda's auto division designed this engine. In fact, consider how many -600 center codes there are in the GL1000 engine's part numbers, a number that was at the time of the Wing's intro reserved for the company's car parts. It's very revealing. The interesting thing about the ballast resistor is that its original purpose on '57 Chevys was to combat ignition coil voltage loss at high engine rpm, a weakness Kettering ignition is famous for. The resistor was supposed to block voltage input into your dad's car at low vehicle speed, conserving it for later use when the ignition really needed it at higher speed. Thus its name. It ballasted energy. A neat idea, but ballast resistors actually have been used in other roles as well, and this includes the GL1000. You may be aware that on the 1000, the resistor is instead used as part if a two-voltage starting/running system. During starting, the resistor is bypassed, allowing the full 12 volts to the ignition coils, but once running, the coils are fed through the resistor, receiving only 6-8 volts. It's a goofy system actually and completely unnecessary, and somewhat typical of what happens when the two galaxies -- powersports and automobile -- collide as they did in the GL1000. Happily, for almost 50 years I have been defeating the GL1000's nonsensical ballast resistor and opening up the spark plug gaps 10 percent to suit, on nearly every GL1000 I have serviced during that time. Improves carburetion. Doesn't hurt the points. And doesn't even begin to hurt the coils. In fact, GL1000 ignition coils are designed to withstand the stress. Back in the day we used to put GL1000 coils on 750s, un-ballasted. Kind of a quasi-factory, period high performance option.
The driven flange/moly grease debacle
Most folks are aware that GWRRA's Wing World magazine ran an article by then-tech editor Joe Christian which "exposed" the GL1100’s severe final drive flange wear. Honda in response initiated a temporary warranty extension (three years, 50,000 miles) on the part and published a special revised rear wheel assembly procedure designed to increase the life of the assembly, later applying it also to their V4-powered shaft drive bikes. As icing on the cake, the company also added a corporate office tour just for GWRRA members, and I was privileged to not only be a GWRRA member at the time but also a corporate Honda employee and thus found myself in the enjoyable role of tour guide. Cool deal. But I digress. Many have insisted that the swingarms were the real problem, being made wrong (I actually saw some techs reweld them to good effect, and Christian had angles and metrics all sketched out in his articles), and blamed Honda for taking the easy way out via the alignment procedure. Maybe. The fact is, the special technique does work, and the driven flanges so treated do last longer. And here's an interesting fact: the success of the warranty extension may have been due as much to the new procedure as to use of the then-new Honda moly (molybdenum disulphide) grease introduced specifically for this problem. The grease was really unusual. Unlike most greases labeled moly this was the real deal: 40 percent actual moly by volume, later increased to 60 percent, and good enough and rare enough that even the BMW guys were gleefully using it for their troublesome K bike transmission splines. A success story for sure, but now things get murkier, for inexplicably, Honda has discontinued the grease, replacing this remarkable and unique product with a run-of-the-mill moly-based assembly paste, good in its own right and similar to what BelRay and others have offered for decades, but like the BelRay product a mere engine assembly lube, not a high pressure lubricant that will stand up to the unique requirements of the Gold Wing's final drive. Unfortunately, the original Moly 60 is no more. The Honda part number simply supercedes to the wimpy replacement product. Owners of Honda and other shaft drive bikes are left searching for a new source of flange grease.