rvf 400 running rough when warm/hot?

[nmdrew]

Hi everyone, im having a problem with my rvf 400,
its running really rough, once the temperatures start to get up. It runs okay once i get it started cold (starter motor on the way out) but once its hits about 60*c thats when it starts to get bad, the hotter it gets the worse it goes, spluttering and nearly no power/throttle response, and it stalls after 5-10 seconds if you dont keep the revs up manually. Once it stalls it gets nearly impossible to re start when hot.

It started happening every now and then a few months back, being fine some rides (max temp it has hit since ive owned was 101*c and it was going fine then) and doing this others, but it has happened the past couple times ive ridden in a row now.

The searches ive done so far have come up with possibly being valve clearences, fuel filter, or just the carbs need a good clean, has anyone else had a similar experience?

Thanks in advance Drew

P.s. I pulled apart the fuel tap a few months ago and i believe it has the hrc mod because i dont recall seeing a spring, and it doesnt actually turn off even in off position, not sure if this could have anything to do with it? There is also a smell of fuel around the bike majority of the time, im guessing this is the reason

Thanks

[vfrman]

It sounds like it is running rich. When is the last time the air filter was checked/changed?

[nmdrew]

It does, im going to try check out if the choke cable is sticking over the weekend and hope it could be something simple like that

I last checked the air filter maybe 2 months ago and it looked fine, its only done maybe 1000ks since then ill post results as i get them

Thanks

[richyrd5]

also check the carb rubbers,as if they are perrished/leaking it usually leans it out but it can play havoc when they warm up..