K3 Not revving past 8k

[DJ123]

Afternoon all, have noticed recently that the bike is not revving past 8/9k, regardless of speed or gear. Bike is absolutely great below those revs-runs and pulls as it should do.
Tried searching a few thread on here and on google.
Some of the items i should be looking at are;
Air Filter
spark Plugs
TPS
Fuel delivery
Compression
Valve tolerances

Best to start with the basic stuff 1st. What is the best way to check fuel delivery;
pipes routed well, not cracked/leaking
injectors getting fuel through
fuel filter not blocked

Any other input/tips of what i should be looking for?

TIA

[muzikill]

Ecu limiting it due to a fault?. Would the test plug process show anything?

[Bibio]

is the bike jerking at 8/9k or just a smooth drop off?

how well does it start?

will it rev past 8/9k in neutral?

is there a slight hissing or parping sound?

you can rule out the air filter unless its completely blocked with a birds nest.

Some guy on here had the same problem at 6k revs , think it was something to do with his battery, check that


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[DJ123]

Originally Posted by muzikill

Ecu limiting it due to a fault?. Would the test plug process show anything?

i've got the tool for it, will try it and see if anything flags up

Originally Posted by Bibio

is the bike jerking at 8/9k or just a smooth drop off?

how well does it start?

will it rev past 8/9k in neutral?

is there a slight hissing or parping sound?

you can rule out the air filter unless its completely blocked with a birds nest.

Not tried revving it that high in neutral (yet)
Drops off and then starts to become jerky.
Starts on the button every time, never had any starting issues with it.
Can't hear any un-normal sound, the power simply disappears
it's k & n, so cleaned and refreshed it anyway.

Originally Posted by Galviniser

Some guy on here had the same problem at 6k revs , think it was something to do with his battery, check that


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Battery is good, hols just over 13v and charging is at 14.5 v. Well within the specified ranges.

Update;
Have checked air filter, cleaned and refreshed. Was clean anyway.
Checked fuel lines-all good, no kinks, cracks or leaks.
Got the spark plugs out. They have a bit of soot on them are are still at 0.75mm gap.

[Bibio]

i was going to say.

have you checked that the battery terminals are tight?
spark plugs seated properly?
vacuum bungs in place and not cracked?

[DJ123]

Yeah battery terminals are good and tight.
Spark plugs were seated properly.
Where are the vacuum bungs loacted?

[Bibio]

at the bottom of the TB's http://forums.sv650.org/showpost.php...&postcount=105

[DJ123]

Got new spark plugs and installed them. Bike revs absolutely fine to 11k.
Going to go out for a ride on it tomorrow and see if it still lacks power. Hoping that something i have done today has cured it, if not at least i've narrowed down the list of things to check!

[DJ123]

Originally Posted by Bibio

at the bottom of the TB's http://forums.sv650.org/showpost.php...&postcount=105

Checked caps this morning and all is well. Looks like what ever i did yesterday has cured the problem