how do i lean out my carbs on a 1982 750 yamaha seca

 

I am currently fouling plugs and getting lousy performance with this bike.
any help would be great.

 

http://www.dansmc.com/carbs.htm

aloungelizard wrote:

 

thanks but I need to know where the adjustment is
the site you sent is very good though huh?
I found it the first day I had troubles.

 

yup.  sorry, but I read your subject line as "CLEAN out my carbs"
instead of "LEAN out my carbs".  oops.

aloungelizard wrote:

 

How long have you owned the bike and how long since it started to run rich?
The reason I ask is because this sounds more serious than an adjustment.
When these carbs get dirty and need cleaning, they tend to run lean, not
rich!

Check the airbox - if a mouse has made a nest in there, it could would cause
a rich condition. Have you removed an aftermarket exhaust and put the
original back on? Again, if the carbs were properly adjusted with the
aftermarket exhaust, it could run rich with a more restrictive exhaust.

Are all plugs appearance the same or is one or two fouled? If two are
fouled, it could be a coil since each coil operates 2 plugs.

Start simple - how long have the plugs been in? If over 1 year, replace them
with the plugs that Yamaha recommends and stick with NGK. A previous owner
may have installed a colder plug in error.