fazer coughing

[joehanson70]

hi.


iv'e had my Fazer for a while now, and iv'e never had a problem with it.


but recently iv'e stopped riding it through the winter months, and was using my scooter for a bit.


but about 2 week ago i got it out and because the weather was nice. everything seemed as normal, it started and ran fine. not a problem


but set off on it after warming it up. and about about 4000 rpm as iv'e let the clutch out and give it a small hand full of throttle. it has a slight cough. just enough to be annoying. it seems to go away slightly as the bike gets up to its running temp.


also its always been serviced etc.


but one thing i did change before i stopped riding it. it had a vacuum Scott oiler, which i took off and sold. i caped the vacuum port off with a rubber cap so that makes me think its not a vacuum problem. however the carbs now may need balancing due to me changing something that was connected to a vacuum port.




anyone got any theory's before i let my mechanic look at it would be much appreciated 

[Simon.Pieman]

How long has the fuel been sitting in it? Did you drain the float bowls when laying it up?

[red98]

Damp.......not being used for a while and it has been a wet/damp winter,.....check all electrical conections , black box under the tank in particular.
Noticed this is your first post,make your second in the intro section so we know who we are talking to.....welcome to he site

[Punkstig]

/\

Do simple elimination tests before seeking mechanical advice, pull the plug caps off the spark plugs (not the top wire out of the cap) generously spray inside with wd40 and over the tops of the spark plugs.

[Gnasher]

Classic icing symptoms matey.  Unlike what the name suggest it will most likely happen just below 6* and when the air is damp just like what we've been getting of late.

If you search icing your find very detailed post about how to cure it the quick fix add additive best option clean out the heater system.