Just got my track bike about ready and running, went for a nip up the road and once it gets up to around 5500 rpm it develops a really bad misfire and wont pull any more feels really bad.

I've changed the coil off my tyga bike but no difference still rubbish
Changed the plugs and even tried a second hand csi I had in the shed

Nothing seems to cure it need some ideas now please.

You need to fit your speedo again...

Or, research the "resistor mod" to stop the CDI thinking the speedo is missing..

Nothing too difficult to sort...

Resistor mods sounds like exactly what I need as I took speedo off cheers mate

Just need the 2k resistor now to fit

Resistor modnworked a treat mate ur a legend

Bonus...