Honda CX 500 Forum banner
1 - 7 of 7 Posts

·
Registered
Joined
·
129 Posts
Discussion Starter · #1 ·
Me again...

Got bike running of sorts after standing for x years but its not very happy....looking at plugs (both replaced and gapped right along with new HT leads and caps ) it shows both black and soooty even thought choke not used (or needed ) to start and not sticking on.

Have removed both float bowls and blown through all jets twice and still the same...removable jets and jet holder all clean as a whistle...

Air filter clean and no difference when removed completely....


Any suggestions where to go next other than for therapy.....?

Thanks in advance for suggestions....
 

·
Super Moderator
Joined
·
23,111 Posts
Check your float levels 'on bike' using 4 mm clear tube on the drain nipple. Hold this up the side of the carb with the petcock on and it will show the fuel level. Should be a couple of mm below the carb/bowl joint.

Restricted exhaust.

Weak spark.
 

·
Super Moderator
'84 CX650E that is evolving into a GL500
Joined
·
17,293 Posts
Did you ride the bike at speed before examining the plugs? You can't tell much from looking at the plugs after idling because the mixture is always a bit rich at idle. You can usually get an indication of what is going on by looking at the plugs after a bike has been ridden but to read the plugs properly you need to run it at speed steadily for at least a couple of minutes, then turn the kill switch off, pull over (no idling!!) and examine the plugs right away.

BTW: Please follow the instructions in the Forum Settings link in my signature to add your bike's model and model year (NOT year first registered) to your signature.
 

·
Registered
Joined
·
1,557 Posts
Don't know what model you're running, but if your float levels check good and you have a vacuum fuel petcock, check the diaphragm in the petcock. if it's ruptured, engine vacuum will draw fuel directly into the carbs. Usually indicated more on the right cylinder.
Dan
 
1 - 7 of 7 Posts
Top