cbr 400rr splutters above 6000rpm help

[rochie]

hi all
in need of your help my cbr400rr nc29 is running crap !!!!!!!
as soon as I get to 6000 revs it just splutters
ive balanced carbs properly using vacuum gauges ive put brand new jets in (standard) a kit from NRP CARBS.new plugs
and its the same
can any one help me in urgent need got a track day on Monday !!!!!!!!!

[vr46]

5500 RPM restriction?

Does it rev and drive above 6k? if not then the problem may be with the speedo wiring.

[rochie]

hi thank you for replying
yes it drives but very very poor it just splutters and it feels like the throttle is rolling on of so to say

[rochie]

please help

[vr46]

Not sure really...

Maybe it's worth draining / flushing the petrol tank and cleaning the fuel tap filter? There is also a secondary filter on the fuel tap outlet...

[CMSMJ1]

Have you got a speedo plugged in?

If not, plug it back in

[rochie]

hi yes all plugged in

[rochie]

hi all got it sorted
the tps was out also removed K&N filter and put original in
also removed the filter before the the pump and replaced it and rebalanced carbs
runs 100% better now hits the redline no probs customer very happy now hope this info can help anyone else

[gareth91]

hi, i have a nc23 cbr and around 6000rpm it sputters for a split second then will rev on up. only happens around the 5-6000 mark. What does tps stand for?

[leopard_pagan]

Throttle position sensor