..... Does anyone know if there is an interlock or a sensor that must be satisfied to allow engine start?
Plus, any more recommendations?
You gotta wonder, don't you?? Maybe there's something simple going on (or
NOT going on!

) that's so basic &/or simple we've all just been over-looking it?! :dontknow:
So, just throwing a few random thoughties out there, in no real order or likelihood of involvement, rather just some '
thinking out loud' type thoughts in the hope that it might trigger an idea or better thought from others...

pps:
- Could it be that the kill-switch isn't working properly?? I'd guess not since you've mentioned it functioning earlier in that post above; but hey, it wouldn't be the first time one of those archaic anachronisms that are foisted on modern fuel injected engined motorcycles as outdated and redundant left-over safety features from gravity fed gas tanked & carby engined motorcycles had failed, so it's possibly worth checking further? :dontknow:
- Have you been trying any of these start failures with your foot firmly on the brake pedal??
- Are your brakes working properly &/or is the brake pedal micro-switch dirty/gummed up in any way??
- Are your brake lights working?
- What about trying pulling, checking, and re-seating all the fuses & relays you can find?
- Did you get ANY attempt at firing from spraying Starter Fluid down the Air Intake?
- Do you have a Max-mount & rear Pillion Seat? Could the passenger sensor switch (under the left foit-peg??) be shorted/acting up in some weird way?
OR, going back to fuel &/or fuel supply, you mentioned earlier that you had fuel pressure & that you'd looked for dodgy fuel in the tank; but could there be a blockage or contamination in the
fuel lines?? Given no other solutions, do you think that it could be worth your while disconnecting them at the engine end and at any filter/s before blowing air thru them backwards to ensure they're not blocked; & checking that, upon reconnection, the fuel getting thru is 'good, fresh fuel'? :dontknow: Might it also pay to check/change any fuel filter you can readily access, too??
And that thought ^ brought to mind that some of the early Rykers had dodgy/noisy fuel pumps; have you checked that your fuel pump is
actually pushing
ENOUGH pressure through the entire fuel system?? :dontknow:
Sorry that I can't really offer anything more than some random thoughties, but maybe they'll prompt someone else's thoughtie, or possibly juuust might give you an idea that might help?! Or maybe not

pps:
But hey, (and this is
NOT aimed at you MD!) while I know that you are far & away a
tiny majority on
this Forum in
sooo many ways, for those of you nay-sayers who are out there thinking '
what bloody use was anything in that post?' (and I
know you're out there, even if you
aren't one of those who juuust hasta send me messages, or even more pitifully, send
anonymous messages saying so!

) if you have even the
vaguest concept of how hard it can be to troubleshoot odd stuff like this when you're standing right there within kicking distance of the bloody machine, looking at the freaking thing, and scratching your head between every failure, instead of just sitting at home behind your keyboard feeling all high & mighty cos you could clearly do so much better, but you won't share anything so you can sit there all smugly maintaining your sense of superiority (or more likely, just in case you
might embarrass yourself
if you're wrong :lecturef_smilie: . And besides, it's not happening to you/your machine -
THIS TIME round, is it now? :banghead: )
just maybe you should just
try to imagine for a moment how much harder it might be actually attempting to
help do that sort of troubleshooting over the interweb,
OR even worse how frustrating it could be asking for help on a Forum like this and then & getting diddly squat or '
nothing but crickets' back! :cus: At least when I'm not out there living my life as best as I can, I'm in here
contributing as best I can, even if it doesn't help solve anything
THIS TIME round... At least I've
TRIED to help - and now I'll climb down off my soap box...

:bdh:
Still, if the cap fits, think about it... Just Sayin' :cheers: