Bike running rough after service and carb clean

KwackerJack

I got the bike fully serviced and got the barbs cleaned and tuned also.

Was running great for a week and now it is running rough on occasions and feels like its runniong outta fuel. I switched petrol staions just to see if it was dirty fuel but no luck.

I will tick over but just idle rough. When cruising it sounds like a v-twin but when i open the throttle it cklear out only to return rough when cruisding again.

it can happen at anytime but say in the morning but be fine in the afternoon or vise versa!

Carbs blocked again? Fuel Pump? Fuel Tap?

I did replace a fuel pump relay and cleaned the tap filter before Xmas

Wonda-Boy

Cant read that black writing mate its too early in the morning.....:p

Make and model of bike will help and what year is it?

Did you wash it after the big service?

Mr Sheen!

Is it running rough more so in the mornings. Carb icing could be a possibility?

KwackerJack

Wonda-Boy wrote: »

Cant read that black writing mate its too early in the morning.....:p

Make and model of bike will help and what year is it?

Did you wash it after the big service?

Sorry my work browser is hormonal.....98n Kwasaki P3 ZX7R Ninja

Nope not washed

leppla wrote: »

Is it running rough more so in the mornings. Carb icing could be a possibility?

Is it not to warm for carb icing?? Happens in the afternoon too so I doubt its carb icing!

CJhaughey

What kind of carb cleaning was done? Was it a case of spraying a bit of carb cleaner through them or a proper ultrasonic job?
If it was the former then probably whats happened is that the varnish that accumulates inside them has come loose and is blocking one or more jets.
Does it run better with the choke ? if it does then its probably pilot jets that are blocked.
Strip them and get them ultrasonically cleaned, refit and balance them and you should be good.

Mr Sheen!

KwackerJack wrote: »

Is it not to warm for carb icing?? Happens in the afternoon too so I doubt its carb icing!

No apparently its not. It does not have to be freezing for carb icing to occur. It has to do with the temperature in relation to the dew point. See here

KwackerJack

leppla wrote: »

No apparently its not. It does not have to be freezing for carb icing to occur. It has to do with the temperature in relation to the dew point. See here

Ah I see, time to sell and go injection haha

CJhaughey wrote: »

What kind of carb cleaning was done? Was it a case of spraying a bit of carb cleaner through them or a proper ultrasonic job?
If it was the former then probably whats happened is that the varnish that accumulates inside them has come loose and is blocking one or more jets.
Does it run better with the choke ? if it does then its probably pilot jets that are blocked.
Strip them and get them ultrasonically cleaned, refit and balance them and you should be good.

They were ultrasonically cleaned, yes actually it does run better with the choke on full!!

KwackerJack

Pulled off the tank and cleaned the tap filters...all good.

Pulled off the air-box and searched for any lose hoses etc...all good

So looks like its the carbs themselves