hey everyone. im in portugal cove newfoundland . anyway i took off the carbs and took out the jets and the main was full of old crap thanks for the help.but looked into the rear cylinder intake theres a lot of carbon in there whats the best way to get it out? bacon
Did you happen to look into the front cylinder intake, and if so, did the rear cylinder have more buildup? Keep in mind that on an older bike, there is going to be some buildup, especially if it was used for a lot of stop and go riding, and started often with the choke on. Also, things can look worse than they are. It is normal for it to be black in there. Remove the plugs, and with a tiny little flashlight, look into the cylinders and see what the top of the pistons look like.
Aside from that, how does the bike run? If it runs good, then I agree, just start putting Seafoam in the gas, that will help clean it out. If it runs poorly, or is pinging (detonation), there may be so much carbon in the combustion chamber that it has raised the effective compression ratio. If that is the case, you may need to actually remove the heads and clean it up.
I would suggest hotter plugs, but if you decide to do that, you are on your own. I don't know what your riding conditions are, and plugs that are too hot tend to burn holes in pistons. Jerry.