CV Carb Cleaning - what really gets clogged???

[charlie27]

hi,

I have a set of carbs off a '90 GS1000G I am reviving and want to understand what really get's clogged due to E15 fuel?

I am assuming it's the air pilot jet that siphons fuel off the main jet and is controlled by the pilot screw on the top side of the carb body.

so do a really thorough job by pulling the rubber plug and removing the pilot jet and remove the pilot screw. Soak the pilot jet in cleaner/ultrasonic. blow out the fuel passage tot eh pilot screw.

Are there other critical jets and fuel or air circuits that really need to clean?

thanks

[chuck hahn]

http://members.dslextreme.com/users/bikecliff/

Right side for the rebuild tutorial

[chuck hahn]

Orings from our beloved member Robert Barr. 1 kit does the entire rack. Be easy removing the float seats as gripping them too tight with pliers can squish them out of round.

http://cycleorings.com/#BS_Series_O-ring_Kit

[chuck hahn]

STICKY at the top of the carb section......


http://www.thegsresources.com/_forum...ning-Procedure

[bobgroger]

Don't do a half a$$ job, thousands of new GS owners have tried then did it right. Smallest orfices are the end of the pilot jet, and the starter jet in the float bowl.

[Steve]

I will include my comments in your quote.

hi,

I have a set of carbs off a '90 GS1000G I am reviving and want to understand what really get's clogged due to E15 fuel?
You have a '90 1000G??? Or did you slip and mean '80 1000G?
And where are you that you have E15 fuel? I was not aware that there was any that was available, at least not in the USA.
You have no location in your profile, and I refuse to play 20 Questions.

I am assuming it's the air pilot jet that siphons fuel off the main jet and is controlled by the pilot screw on the top side of the carb body.
The air pilot jet never gets clogged. It only has air going through it, and filtered air, at that.

so do a really thorough job by pulling the rubber plug and removing the pilot jet and remove the pilot screw. Soak the pilot jet in cleaner/ultrasonic. blow out the fuel passage tot eh pilot screw.
If you want to do a half-assed job and get frustrated over crappy results, that is exactly what you need to do.
If you want to see the proper way to do it, click HERE.


Are there other critical jets and fuel or air circuits that really need to clean?
Just the main jet, the pilot fuel jet, the needle jet and ALL the passages in the carb bodies, which requires complete disassembly (you need to replace all the o-rings anyway) and soaking in carb cleaner dip overnight or several hours in an ultrasonic bath.

thanks
You are quite welcome.

[charlie27]

thank its a 1980 (typo) E10 fuel in CA

I already read the click hear and read that before I sent this question. It didn't say which small passages that have fuel in them get clogged - that is what I was asking. I don't see how and air passage way would get clogged. I was going to do the overall cleaning but seems like the biggest issue is with the fuel circuits that handle idle and low speed running. If you feel the need to be sarcastic no need to reply. I don't see the point.

[Steve]

Who was being sarcastic? You asked questions, I answered, them.

One of the reasons that document does not specify which passages get clogged is because it assumes you will be following directions, which will unclog ALL the passages.

If you choose think I am being sarcastic, please let me know, either publicly or privately, I will direct my efforts elsewhere.

I merely saw a post asking questions in an area which with I am acquainted, thought I might be able to help.

.

[JTGS850GL]

thank its a 1980 (typo) E10 fuel in CA

I already read the click hear and read that before I sent this question. It didn't say which small passages that have fuel in them get clogged - that is what I was asking. I don't see how and air passage way would get clogged. I was going to do the overall cleaning but seems like the biggest issue is with the fuel circuits that handle idle and low speed running. If you feel the need to be sarcastic no need to reply. I don't see the point.

Don't be so thin skinned. Being so will cause you to miss out on some good potential benefits. The carb cleaning thing is a very sore spot with many of us. Too many have wasted their time and our time with doing half assed clean jobs.

The tutorial goes through a step by step method and NONE of the steps should be skipped. What you need to understand is that some passages transport fuel only while others transport both fuel combined with air. A few only transport air but those tend to be large and high up in the system. The smallest passages are the ones that carry either fuel only or atomized fuel and air and are the most susceptible to clogging. Trying to decide which to clean better then others is a futile process since the methods described in the CV tutorial concentrates on cleaning all passages. If followed to the letter, we've found that the need to readdress the carbs a second time is diminished greatly.