Juddering while accelerating.

[weasel]

This problem is driving me insane. When accelerating there is a momentary judder, no more than half a second, it never happens while cruising or slowing, its really spoiling the bike for me. So far I have changed the carbs, cdi, plugs and filters, but still he problem persists unchanged. oh and it does not occur if you rev the bike in neutral.

Am I missing something obvious? The only thing I can think of is that this is something electrical.

Any help appreciated, its an NC23.

Ta

[greggo]

Which gear?

Sounds similar to how mine felt when 5th gear wasn't engaging properly. Required a strip and replace a couple of gears and a selector fork.

[scratchin]

i take it you mean a stutter with the engine as in a flat spot, more than likely fuelling

[tanuki]

Which gear?

Sounds similar to how mine felt when 5th gear wasn't engaging properly. Required a strip and replace a couple of gears and a selector fork.

^^^^this was also my first thought, does it almost feel like a surge or like its jumped a tooth on a sprocket?

All gears?

[Dodgy Roj]

check your chain and sprockets !

[weasel]

Thanks for the replies, it happens in all gears, regardless of engine temp. it is more like a very short surge I guess.

[Dodgy Roj]

may be a long shot but look for a tight spot on the chain.

[Waza4]

Are there any strange noises.
Is it always at the same revs or throttle position?

Might be worth checking the wheel bearings.

[tanuki]

Are you sure it's all gears?

Does it happen at the same revs everytime?

[Waza4]

Clutch judder ?

Maybe time for a workshop or dyno.