Question about 1997 Suzuki GSX 750 F (Katana)

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I see the fluid in the brake reservoir is low. Where do put that oil in? Duh!

One of the left valves has a small leak. Could that have something to do with the brake fluid? I didn't get a manual with the bike and still somewhat of a newbie! Thanks

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  • Lori Anthony Dec 03, 2012

    Thank you. I did read about it by downloading a manual. I will be putting DOT 4 brake fluid in the master cylinder. Can you tell me if putting it in there is good for both brakes (front and back?). Thank you so much for your answer! Lori

  • Lori Anthony Dec 03, 2012

    Thank you everyone for your input. I will be taking it to a shop. I just want to learn some myself also. This is a great forum. Thanks again everyone and keep the rubber side down!!

  • Brett Drew
    Brett Drew Dec 03, 2012

    There should be seperate master cylinders for the front and rear brakes. The rear one may be hidden behind the frame. Best way to find it is to follow the brake line back from the brake pedal. If gxr from that year has mechanical brakes in the rear, you won't need fluid. I'm not all that familiar with your bike, I work at a Harley dealership!

  • Lori Anthony Dec 03, 2012

    I will check both areas. Thanks



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  • Suzuki Master
  • 448 Answers

Do not put oil in the brake master cylinder! Only DOT 4 or DOT 5 brake fluid should go in the master cylinder! The proper fluid should be listed on the top cover of the master cylinder. Brake fluid will have absolutely nothing to do with your valve leak.

Posted on Dec 03, 2012


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Posted on Jan 02, 2017

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SOURCE: i have low fluid but i dont know what to put in it

+1 to that.
to the guy asking the question. Seriously? if you cant figure out what you need to add take it to someone that knows what they are doing. there is nothing on the left side of the bike that has a fluid window or anything. Coolant overflow is on the right, oil window is on the right, brake master cyclinder is on the right.

Posted on Jul 19, 2009

  • 152 Answers

SOURCE: oil leak from the front of the motor

Its funny you should mention this but yes, I had its bigger brother the GS 850 G , same problem, Apparently, in my situation I did the same thing and went to the shop and let those butchers make it worse !!!, the way i found my leak was by washing the motor with a grease and oil cleaner , strayed the whole motor and wash it all off totally, then I turn her on and let her get to operating temp went for a few mile and came back and checked it, for me it was the head gasket   the guys put on and i forced them to do it again,  I found out later that it was common with the suzi's of that model and ended up doing it myself, I used the original gasket and used a compound called gasket goo and it never leaked through out the 8 years i had it . But before you do anything , surly they gave you warrant y on the work so take it back and demand they do it properly.
Cheers and ride safe

Posted on May 18, 2009

  • 23 Answers

SOURCE: I have no front brakes

First of all. Thank you for your service our country appreciates your dedication and your families support.

Bleeding the system is a series of points from front right to back left. then To front left and back right.

then repeat. 2x. After that bleed brake system at the front then the back. over and over. NO disruption of a steady stream, this is a totally sealed system. 0 air. that means if its not perfect its wrong.
The factory actually primes the lines with vacume from the caliper end. keep that in mind.

**Buy a nice new measuring cup and reuse all Fluid.
Dot4 is not cheap.

Please check caliper seals for the "wet" look around the boot and brake line inputs.

This should work. its not uncommon

The only other thing is the Brake reseviour could be sucking in air. Check for capt tightness. Gromet seal. and and the inner plunger not to be stuck in the down position. pluger is a diaphram. not an actual pin...
amazing ride man.. last of the best Wear a helmet plz.

Posted on Feb 04, 2009

  • 188 Answers

SOURCE: I bought my first bike used & it rode fine! Its dying

Possibly if too full oil is getting to combustion chamber? Have you pulled a spark plug to see what they look like? You should check owners manual for correct procedure on addin/changing oil. I always recommend the shop manual for usually under $15 at auto/cycle parts stores.

Posted on Jul 26, 2009

  • 376 Answers

SOURCE: rear disk brake: clamped!

The rear brake cyclinder need rebuilt. And please try not the type swear words please.
And the brake fluid needs to be changed.
The fluid is the same type as used in cars but make shure of the type your bike calls for. It will state on the lid. DOT3- DOT4 ?? The gas cap is sapose to be vented but you bike may have a vent that goes in from the bottom of the tank and it may be pluged.
Allso a manuel for your bike would help you out a lot.

Posted on Nov 19, 2009

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How to bleed rear brakes

  1. Remove the top of the master cylinder reservoir.
  2. Using a turkey baster, **** out as much of the old dark inky fluid as you can.
  3. Clean any sediment out of the reservoir with a clean, lint-free rag. (Do not spill any brake fluid on any painted surfaces, it will remove the paint immediately.)
  4. Fill the master cylinder with clean brake fluid.
  5. Replace the top of the master cylinder reservoir.
  6. Pump the brake pedal several times (15 or more).
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  9. Put the other end of the tube into a small, clear bottle with an inch or two of clean brake fluid in it. (This will keep air from being sucked back into the brake cylinder.)
  10. Put a piece of 1 x 4 lumber or some other "spacer" under the brake pedal to prevent the pedal from traveling too close to the floor.
  11. Remove the top of the master cylinder reservoir.
  12. Top off the master cylinder reservoir with fresh fluid.
  13. Replace the top of the master cylinder reservoir.
  14. Have your helper sit in the driver's seat and slowly depresses the brake pedal with an even force and hold it down. The helper should shout "down" when the pedal is down as far as it will go.
  15. 15Starting with the rear passenger wheel (back right for righthand drive cars), turn the bleeder bolt to the left one quarter-turn. Old fluid and air will go down the tubing into the bottle. When the fluid stops, close the bleeder valve.
  16. Shout "up" to your helper, who at this point should remove his foot from the pedal allowing it to move up.
  17. Repeat this process until new, clear fluid comes from the bleeder tube. (After every five (5) times the brake pedal is depressed, top off the master cylinder reservoir with fresh fluid. Never let the reservoir get too low, or air will be sucked into the master cylinder.)
  18. Tighten the bleeder bolt.
  19. Repeat steps 14 to 17 on the left rear wheel.
  20. Repeat steps 14 to 17 on the right front wheel.
  21. Repeat steps 14 to 17 on the left front wheel.

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