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Losing power

Joined Dec 2009
68 Posts | 0+
Wimbledon. LONDON
Chaps, I've got a new issue i need help with. Just fitted a hooked filter and dr Rossi chip. It was running sweet for the first blast. Second ride it twice stuttered on constant throttle but was fine after that. Yesterday, stuttered twice on motorway, then on full throttle in third stuttered, juddered then completely cut out, efi light on. I turned ignition off and restarted and it ran fine again for the rest of the ride apart from a couple more stutters.

By stutter I mean the power drops, it splutters and then picks up again. Any ideas, I did notice when doing the tps sensor one of the bolts would not pinch tight for some reason.
 
You shouldn't as a rule need to touch the TPS .... but by what you are saying you have stripped the bolt & will need to replace it or Helicoil the mount .. The hooked airbox has alot different air flow from a stock box running a K&N filter & unless the Eprom as being written to take this into account then there is a very good chance the bike want be fuel correctly . If the TPS isn't tight then it is more then likely it is moving & stuffing up the signal to the ECU .. Get it sorted !
 
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