Busa misfire

[ptolemyx]

Some of yous may recall I had a misfire on the Busa when on minimal throttle on a recent ride out. Still been happening, especially when the motor is hot and I've had a lumpy tickover - we all get that as we age. Just had the air filter (DNA which is K&N type) off and found dead bug central:-

DSCF3945web1600.jpg

Will clean filter now......

[MellowYellow]

Do you want fries with that ?

[Ruffian]

Extra protein for you tea.

[TLS-Moose]

I'd be really surprised if that was enough to cause a detectable misfire, especially at low revs where airflow isn't really an issue?

[Jug]

I did mine on the Superduke at the start of this year.
It was a bit manky but didn't have too many bugs in it, probably because it's an open type custom airbox and also not ram air I guess.



Much nicer after a soak and a re-oil.

[jer r1]

I'd load another round and try shooting it again.🏍

[menzies3032]

I had a similar issue with my Gixxer 600 K1 had a really dirty air filter and spark plugs were not changed in years. Got them changed and ran like a dream ever since

[ptolemyx]

Will replace the plugs while I have her open for this bout of surgery. Fingers crossed I cure it, could be leads/coils but I'd expect that to show when under load, otherwise stumped.

[Buggs]

Sounds more like tps needs resetting

[ptolemyx]

After finally getting new spark plugs with the air filter cleaned and re-oiled and some STP fuel system cleaner in the tank all is well again. Didn't have to adjust the tps after all. Reckon it was the plugs that did it, even with only 16,500 miles on the clock???

As a precaution to minimise ethanol effects I'll now put super-unleaded in whenever possible, at the extortionate extra cost of about a pound a tankful. Pity I don't live in Chard, eh Roy

[menzies3032]

Great to hear that it is back up and running. Just goes to show the importance of the servicing bits. Oil, Filters, Fluids, Pads, Tyres, Plugs all need sorting on a regular basis to keep our beauties purring as we want them to

[royb]

How plugs fail amaze me; what is it but a bit of thick wire, in ceramic with a gap one end. I know they do fail because I have experienced it on my enduro, as you have now.
Glad you have sorted it-- a cheap fix.

The bandit is still on the original plugs (40,000 miles)

[Robbo87]

. . . . . . . . . . . . The bandit is still on the original plugs (40,000 miles)

Why are we not surprised to learn this .

[royb]

If it ain't broken why change it.

[Jug]

True, but there have been cases where people have taken plugs out and found bits missing.
Sparkplugs are pretty robust things though so I guess you're expecting they'll outlast the engine, or maybe last another 20,000 or so miles.
I've never understood why motorcycles supposedly "need" new spark plugs more often than cars, though they do rev a bit higher.
E.g. Ford Focus spark plugs are changed at 100,000 miles, so... there's that.