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GSX-R 750 Pictures of how I cleaned and adjusted the carburetors on my 1985 1986 1987 Suzuki GSX-R750 motorcycle.


Getting the carbs out was relatively easy. Just did that. Now I will figure out what carbs I have and see what's inside.

But first, lets pay some bills:
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  1. Here are some carburetors, out of the bike and up on the bench. Yep. Carburetors.
    Carburetors


  2. They are full of gas. I am tired of spilling fuel onto myself a little bit at a time every time I work with these. So I will drain all the bowls into this bottle. That way I can dump all the gas in my lap at once. That's thinking ahead.
    Fill a Bowl


  3. Gixxer.com and GSXR.com have a lot of knowledgeable people. From those forums I learned what size carbs should be on my bike, the BST31SS, and how to check if that is the carb I have. The 31 stands for 31mm. The inner diameter of the front of the carb is 31mm on the BST31SS. There we are. These are thirty one mm exactly. The BST34SS - 34 mm. The BST36SS - 36 mm. The BST38SS - 38 mm. I am beginning to see a pattern.
    BST31SS


  4. Here is a look at the front of the carburetors. Front meaning toward the front of the bike. Butterfly valves in each circle. Fuel hose wrapped in wire middle top. Idle set screw middle bottom. The two sets of two black hoses descending from between the carbs are connected to vacuum, and are used to balance the carbs. Joined together like this they are a Gang of carburetors. Like a murder of crows. Flock of camels. Mess of iguanas. Crash of rhinocerouses.
    carb gang


  5. This is the mystery nipple, also hooked to vacuum. I do not know what it is for. So I capped it. I can not tell any difference in how it runs.
    Mystery Nipple


  6. Here is a look at the back of the carburetors. Slides in each circle. Venturi at the bottom of each slide. Jet needle in the middle of each venturi. Little brass colored circle below the jet needle is the main air jet. The carbs are numbered 1-2-3-4, left to right, in this picture. Black hose from carb 2 to 3 is just a breather, and does not need to be hooked up to anything.
    Carburetor numbers


  7. Bottom of the carbs. Float bowls with a float bowl drain in the middle of each one. The circle just above each float bowl is the pilot screw.
    Float bowls


  8. Here are the K&N air filters, cleaned, oiled, and installed.
    K&N air filters


  9. Next I sold out to make 02ยข so I can fulfill my lifelong dream of owning a 1986 944 with blown head gaskets.
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    But no minivans!


  10. Then I finished my beer.
    Beer

All 5 pages dissecting carbs:
Carbs1_Remove
Carbs2_Description
Carbs3_Disassembly
Carbs4_Synchronize
Carbs5_Floats


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Think: Cars are expensive, powerful, and heavy.   Before I start work, I face the possibility that I will destroy my vehicle, my own life, and innocent pedestrians' lives.   If anyone messes with a 4000 lb machine capable of 100 mph, these are real possibilities.   If I get in over my head, I call a professional mechanic.   The information on this website is provided only for entertainment purposes, and it is not intended as advice on how to service a vehicle.   For all you know I made this up.   Don`t believe everything you read on the internet.

Disclaimer: The technical information in these documents is provided without any warranty whatsoever and at no cost.   All information is in general terms and is not meant to apply to your particular situation, be current at the time you read it, or even be correct in the first place.   Improperly maintained vehicles can lead to serious injury, death, or unavoidable accidents. The author is not responsible for any errors on this site, and does not make any claim at all about the validity, safety, or veracity of the information contained on this website. Any work you choose to do or not to do on your vehicle is done at your own risk. The information on this site is not intended to serve as a replacement for professional advice, professional workmanship, dealer service, union labor, or psychological counseling.   The author disclaims any and all liability directly or indirectly arising from the application or use of any information or idea contained on this or any other web site.   By opening this page, you agree to never sue anyone ever or allow anyone to be sued on your behalf.   The appropriate professional should be consulted regarding your specific condition.    BeerGarage.com does not take responsibility for the information posted on other sites to which it links.

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Last modified: 11/25/2014
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