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Bike actually feels smoother, but then again probably just my imagination.....
If the issue is simply the sealing grommets around the bottom of the Bakelite tubes then these are easily procured simply by buying a pair of right angle NGK caps, (Sorry I can't offhand remember the part #.) and using the grommets off them. Give the caps to one of yer mates with a 2V bike for spares. You will probably find they have some spare grommets around if you ask as the first thing to get boogered when a 2 valver falls over is the plug caps.Pete
When I have the time, I'm going to dissect the parts with a surgical knife and see if I can discover the fault.
You beat me to it. I was going to ask if you had measured excessive resistance on the old caps, but it sounds like you're going to dig into it the old fashion way (get a knife!). ;DLooking forward to hearing back on the cause of death. ;-T-NV
When servicing 8V motors I have noticed a clearish yellowish material that has oozed out of the caps from heat. This is on the newer flat top 90* factory caps. Don't know if this is causing any spark issues but makes you wonder about the materials they use. These caps worked fine but for how long.
:pop
I was monitoring this thread and eventually my bike broke down with the same problem. Some electrical tape got me going again. I think I'm going to order the OEM cap and carry electrical tape or silicone tape. I may wrap a couple winds of tape around the caps as a preventive measure, though. BTW, I don't think I did anything to damage the cap.
The NGK option is an inexpensive one that seems to work better than the stock set-up. Buying both the SBO5E and the SD05F (for the smaller rubber seal) will cost maybe $10-15 max for both cylinders total.You can wrap the stock wires/cap in tape and/or install some heat-shrink tubing over them but I am not sure that will always work 100 percent. I'm thinking that some of the problems occur because the stock wire actually breaks internally at the junction with the cap where there is connecting hardware.
The SD05F caps will not fit the terminals of the stock Stelvio NTX sparkplugs. The sparkplugs have the push-on terminals and the SD05F fits the screw-on terminal plugs. SB05E fits the push-on terminal plugs but the rubber boot is too big.