I also think Yamaha's fix will be pretty good at fixing the problem, because I think it is an overload issue, and not a corrosion issue.
Art,
I think this was directed at my prior post, so I will respond. I think it is
both an overload issue
and a corrosion issue. Here's why:
When the spider is new and fresh the contact resistance is low. Low enough so that there is not much heat generated in that resistance by the heavy loads that go through the spider connections. After some time, (as you mentioned) all exposed electrical contacts become somewhat corroded and build up additional resistance. The S4 spider is in a bad place and gets wet from rain, washing the bike, etc. Over time, that same identical current that was previously OK now begins to heat up the connectors contacts, eventually to the point of failure.
So there are several ways to skin this cat. Yamaha's solution was to individually ground the 5 lines coming
into the S-4 bus through the same exact connector that had previously proven inadequate. If all 5 of those ground lines carried the same load, this might lead you to believe that their solution gives you an increase of 5 times greater overhead. But they don't. I don't have the exact info at hand, but I recall that some of the grounds are just to electronic equipment and one goes to the radiator fans. The latter will represent the majority of the total current going thru that spider, and that current will now be going through just one contact pin of the S4, with no metal spider to act as a heat sink.
They could have moved the heaviest loads out of these failure prone connectors (like your roadrunner harness does) and had a better improvement. I believe that Brodie's harness is pretty much the same as the Yamaha fix, except he also takes care of all the other spiders.
A clutch switch is a necessary component. It allows certain safety functions in interlocking the starter. Doing occasional maintenance on something like that is a necessary evil. For these ground buss connectors (aka spiders) there really is no
need to have them in the harness at all. And they are buried in an inconvenient place, not conducive to regular maintenance. Why not eliminate the failure point
entirely with a permanent, weatherproof connection appropriately
over-rated well above the working current of the joint? That type of a solution would not have been any more expensive to deploy (quite possibly less expensive to Yamaha overall if it could also be used to repair moderately damaged harnesses) and it would have
addressed the root causes of the failure, rather than slapping a band aid on it.
Being a 1st gen owner, I really have no dog in this hunt. I just hate to see people getting all excited about getting (what amounts to) a half-assed solution to a problem that never had to exist in the first place, if the product had been more thoughtfully designed.
I mean, it's not like this is the space shuttle or something, right? It's just a bike!