flat spot

[Cammo]

Lets put some facts down:

JETS
Japanese Spec Bikes should have 116F-118R jets in.
UK Spec Bikes Normally have 118F-120R Jets in.
Both bikes normally run 35 Idle Jets all round.

'89 model jap bikes run 110's all round, and run too lean with any exhaust mods.
Later Jap bikes run 115f & 118r.
UK models have 122's all round.

NEEDLES
Im not sure of the difference between Jap and UK needles, but Japanese needles usually have a 0.5mm Washer underneath them, whereas the UK spec ones have no washers underneath them.

Jap bikes ALWAYS have a single 0.5mm washer as standard under the needles. I imagine the UK carbs would also as they use the same needles.

Sorry to have to be thh one to point out your errors, but saying your post was factual was probably misleading to some people.

[viper_biker]

Dunno where those 'Facts' came from...

Also, drilling the slides have absolutely nothing to do with the environmental dip, its only for throttle response. Easiest way to get ride of the dip is to go with a programmable CDI from Rick and apply the HRC map to it. My bike has no dip in it, just a big clean rev right through.