how do I know if my injectors need a clean?

[SUPERSTARDJ01]

hi all, as the title says really, what's do I need to look for?

[Dan505]

Nozzles look blocked, bike is running lumpy?

[yorkie_chris]

What bike... what symptoms... throw us a fricken bone here :-P
http://www.php-web-host.com/ckfinder/userfiles/images/dr-evil.jpg

[SUPERSTARDJ01]

Alright Chris, K1200R just sounding a bit breathless when rolling in gear in neutral it's ok though, a little hessitant ain lower revvs but great in higher rev range, fuel economy slightly down but nothing massive.

[yorkie_chris]

The rest of the bike would be where I'd start before looking at injectors. Pour-in-tank injector cleaners do fook all and taking them out for "proper" cleaning has as much chance of causing a leak.

Air filter? Plugs? Balance of throttles?