Re: Gsxr 600 srad surging at constant throttle
 

I'd clean the carbs and see how you go. Could just be a bit of something stuck in one of the jets.

Re: Gsxr 600 srad surging at constant throttle
 

I reckon some crap in the pilot circuits somewhere. Sounds lean.

Re: Gsxr 600 srad surging at constant throttle
 

It also picks up to about 4k revs on the choke as soon as you apply the throttle but not sure if thats normal for this bike. Im thinking carbs probs next logical step...Yup i check the oil frequently-ish. Ive just done an oil and filter change too so its all fresh. How can i test the coils if they are intermittent?

Re: Gsxr 600 srad surging at constant throttle
 

You can't test them for that. Make sure carbs are spot on first as that could explain surge. Coils cannot explain surge but they could cause hesitation on pickup.

Re: Gsxr 600 srad surging at constant throttle
 

Fair enough, i was thinking it was fuel related and it seems more likely. Would it be worth looking into getting them ultrasonically cleaned or a diy job? If the pro cleaning is worth it, what sorta £ am i looking at?

Re: Gsxr 600 srad surging at constant throttle
 

DIY job. Carb cleaner and an air line.

Re: Gsxr 600 srad surging at constant throttle
 

check the vacuum hosing for cracks, engine breather for blockages and tank for rust. how old are the plugs?

i always check to carbs is working first then i do carb clean. no point in cleaning carbs if something else is wrong before carbs.

Re: Gsxr 600 srad surging at constant throttle
 

Tank wont be rusty as it was fine when fitted in august. Plugs not too old and their iridium. Dont think breathers blocked as i get a bit of oil in the airbox

Re: Gsxr 600 srad surging at constant throttle
 

Which is the vacuum hosing, the vacuum from the tank to the carbs?

Re: Gsxr 600 srad surging at constant throttle
 

Other way around but yeah, if that's got an air leak it won't help at all.