Ts1, sip vape static and boxpipe, starting/running issues( f

[Speedy Hufton]

Spoke to a mate earlier who's going France euro and he's got a couple of woes with bike starting after running. I have no idea about the sip vape other than folk saying they are very good so couldn't help. His issue is that he starts the bike, goes a run local or a distance, gets back and next day it simply wunna start until he changes the plug?? He uses NGK B9ES, so I asked if he'd tried an N3 Champion out of curiosity and he has plus also nipping densu, still the same. A dealer said try a new sip stator as they fail regularly??? Not heard this mesen.
I asked if he'd checked the reeds as I had a similar issue when they were worn on mine, but all he knew was that they've been in for 3 000 miles. He dunna do his own rebuild so I thought I'd ask. Anyone got any thoughts would be appreciated. Cheers, Speedy.

[Fast n Furious]

Try starting the cold engine by first giving the carb throat a good squirt of "Easy start".
If it doesn't fire up, then I would suspect it's because of a weak spark or non at all.

[missing lynx]

What do the plugs look like he takes out?

[Speedy Hufton]

Thanks both. Re easy start, it always starts on a new plug and will start all day long until left overnight??? Re plug odour I'll get back to him on that, cheers both Speedy

[ULC Soulagent]

Check that all the earths are good with the vape