High Revs Running Problems

[superfly108]

read through most threads regading this still no answer,

basicly it like bogs down at about 8k

saying that i took the air box out and it bogged down at 6k,

have had spark plugs out recently, they were black and wet,

carbs havnt been adjusted,

Spark Plugs are the two electrode type

air box is clean

fuel pump guessed to be working as makes a sucking noise, but didnt spit fuel out or anything, fuel lines not through to be blocked either

any ideas?

[Bikerz]

ah i think i know.

What is the bike? import or not? does it have kmh clock or mph ones? what cdi unit are you running?

[superfly108]

hmm we regapped the plugs and seems to be running, my guess is that one of the cyliders wasnt firing,

my bikes uk version not restricted as run fine up 2 135mph ish before,

gonna get new plugs filters and oil and fit my new tyre and see how it goes