So i have my carbs off on my 1999 F4 cleaning them. I decided to look down in the head and noticed the valves are caked in black gunk. Should i spray something on them to clean them off or....?

 

Unless you want to remove the head and take it in for cleaning, I suggest putting the carbs back on and running cleaner through the tank and or carbs with the bike running. Also, some high rpms somewhere would help fuel flow through there to aid in the cleaning. I don't suggest sprying the deposits with cleaner because if a chunck of that gunk comes loose and gets lodged somewhere it shouldn't be, you can screw things up.

 

Chevron Techron or SeaFoam

 

Any write-ups on how to sea-foam?

 

Dump it in your gas tank.

 

easy enough

 

Thats the easy way but I've also heard you can poor some into your carbs. But its probably best you start at the tank because it will kill anything along the way.

 

Well, its harder on a motorcycle. They're horizontal and not vertical like cars (well most carb'd cars). So you'd have to find a vaccum line that sucks to the carb's and besides that you dont know if its reaching all carbs or just one.

Another thing, I know on my VFR, the throttle body butterfly plates have a coating on them that helps seal them when closed, so I cant spray anything directly down them.

If the bike has been sitting for awhile. I'd would take them out and clean them part by part.


Use that Techron stuff. The valves on my bike at gunk and it went away after the second tank of it.

 

Carbs have already been ripped apart and cleaned, Ill just run it through the gas.