1981 GS550 Wont rev above 6-7k

[LAB3]

If your petcock screen is borked and allowing crud to get through to the carbs then the needle won't seat right to regulate the fuel level. Checking the petcock, replacing old lines and cleaning out the tank are something you should be doing right now.

[timebombprod]

If your petcock screen is borked and allowing crud to get through to the carbs then the needle won't seat right to regulate the fuel level. Checking the petcock, replacing old lines and cleaning out the tank are something you should be doing right now.

i agree with him would you want a heart running with contaminated blood

[octusis]

If your petcock screen is borked and allowing crud to get through to the carbs then the needle won't seat right to regulate the fuel level. Checking the petcock, replacing old lines and cleaning out the tank are something you should be doing right now.

I’ve just went through the carbs again and cleaned them. I’ve not had any experience with these carbs prior and I believe there is supposed to be a plug in the pilot jet upon further research, which these carbs don’t have any. So is it possible that could be my issue and someone had removed them in the past and forgot to put them in?

[rphillips]

YES, those little rubber plugs have got to be there. Will start & run without them, but nothing under load will be right.

[octusis]

YES, those little rubber plugs have got to be there. Will start & run without them, but nothing under load will be right.

Good stuff, already have them on order and cleaned carbs thoroughly as everyone else has said to do.
I’ve never seen anything like it on any of the other carbs I’ve ever worked on, odd that they need to be blocked off haha.

[octusis]

It worked. She finally runs decently alright, its breaking up a tad but I think thats due to incorrect float level. Thank you everyone for the help!