Busa misfire

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Busa misfire

Post by ptolemyx » Aug 5th, '19, 12:22

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......
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tuned & modified 08 B-King - stockish 14 Busa - modified 01 FZS1000 - a nutter on all three :twisted:

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MellowYellow
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Re: Busa misfire

Post by MellowYellow » Aug 5th, '19, 13:42

Do you want fries with that ?
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Re: Busa misfire

Post by Ruffian » Aug 5th, '19, 16:50

Extra protein for you tea.
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Re: Busa misfire

Post by TLS-Moose » Aug 5th, '19, 17:38

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? :-?
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Re: Busa misfire

Post by Jug_Inspector » Aug 5th, '19, 19:39

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.

Image

Much nicer after a soak and a re-oil.

Image

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Re: Busa misfire

Post by jer r1 » Aug 5th, '19, 20:11

I'd load another round and try shooting it again.🏍🔫
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menzies3032
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Re: Busa misfire

Post by menzies3032 » Aug 5th, '19, 21:07

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
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Re: Busa misfire

Post by ptolemyx » Aug 6th, '19, 09:03

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.
tuned & modified 08 B-King - stockish 14 Busa - modified 01 FZS1000 - a nutter on all three :twisted:

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Re: Busa misfire

Post by Buggs » Aug 6th, '19, 09:16

Sounds more like tps needs resetting

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Re: Busa misfire

Post by ptolemyx » Aug 13th, '19, 06:20

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???

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tuned & modified 08 B-King - stockish 14 Busa - modified 01 FZS1000 - a nutter on all three :twisted:

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Re: Busa misfire

Post by menzies3032 » Aug 14th, '19, 12:31

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 B-) :-bd
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Re: Busa misfire

Post by royb » Aug 15th, '19, 08:05

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)

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Re: Busa misfire

Post by Robbo87 » Aug 15th, '19, 18:45

royb wrote:
Aug 15th, '19, 08:05
. . . . . . . . . . . . The bandit is still on the original plugs (40,000 miles)
Why are we not surprised to learn this :D .

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Re: Busa misfire

Post by royb » Aug 15th, '19, 19:23

If it ain't broken why change it.

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Jug_Inspector
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Re: Busa misfire

Post by Jug_Inspector » Aug 16th, '19, 08:39

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.

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