Suzuki gsxr600 srad 1998 bike .When stationary in neutral ot starts and runs fine .... it revs sweetly up through the rev range , when when on the road it accelerates well in 1st , then jit second gear and give it a bit of gas , at starts to jerk , buck , surge ... it is totally erratic in 3rd , 4th etc, etc ......any ides ?

I would normally it is probably stuck, but the starter motor doesn't have the normal bendix on a spiral grooved shaft. It looks like it is permanently connected. I tried to see if there was some type of starter clutch behind it, and there is. It should release when the starter stops spinning.

Suzuki Gsxr600 Srad Gsxr750 Oem Gsx1300R Starter ...

https://picclick.com > ... > Other Engines & Engine Parts
SUZUKI GSXR600 SRAD Gsxr750 Oem Gsx1300R Starter Clutch - $99.99. FOR SALE! 1999 Hayabusa (GSX1300R) - STARTER CLUTCH (MODEL K3).

https://www.google.com/search?q=1999+Suzuki+GSX-R+750+starter+mechanism

Starter clutch

https://www.google.com/search?q=1999+Suzuki+GSX-R+750+starter+clutch

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what make and model ?

Full disassemble of carbs is needed. Thorough cleaning on jets and airways, vacuum and pilot screw adjustment must be done too.
Check the spark plugs for lean mixture indication and replace them if necessary.

bike will not start or stay running on a full charge battery/bought brand new battery, still same promblem,jump bike off,will crank ,ride bike for 30 min. park bike, leave bike...

First impression was why would anyone rev their motorcycle to 9 grand in neutral? I could see if you were in gear clutch pulled and ready for a "drag" or Race Start but in neutral?

Anyway I can't hear it so if the sound is like it hits 9k and starts popping then two things either an over rev limiter which I doubtr because the engine red lines at 13,500 OR you have a set of spark plugs breaking down under load

Have the same problem on mine. Putting it on a rolling road tomorrow
to check fuelling as it may be float heights or fuel pump. Will post you any positive result.

i have just had the same problem with my 99 srad 600. there is only one soloution to this and it is not a dyno, that just makes thing worse, the flat spot just off idle is due to it beign on carbs and i have put slightly shorter inlet tracts onto the carbs which helps them breeth easier this coupled with a new front sproket which is one tooth less than standard will get you over the stutter problem and will help the bike at lower revs as the sproket inceases the rev range right from the off throttle position, but be careful as the lower gearing makes for some good wheelies if your over keen on the gas. lol.

unlikely. If u don't work on your bike the best thing u can do is take it back to whoever did the plugs and tell them to fix it.

it sounds like your choke is sticking on