20 Most Recent 1977 Suzuki GS 750 Questions & Answers


i put 115 main jets in my 77 ge 750 and it will run but was told to jump up to 140 with pobs and 4into1 pipe (SM6) race pipe at the low side run 130 main and leave the stock pilot in. i rorde mine from NE to SD roude trip about 1300 miles got about 62 MPG with 115 jets jumping up to the 140 will drop the MPG but lets be real im not looking for MPG. hope this will help.

1977 Suzuki GS... | Answered on Jun 27, 2019


Hi, Anonymous before testing any electrical component in the Charging System it is "IMPERATIVE" that you have a fully charged battery of 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage, the battery is faulty and must be replaced. AGM type batteries fall into this scenario more so than lead-acid batteries.
1. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
2. To check the regulator unplug it from the stator. Take a test light and clip it to the negative terminal of the battery and then touch first one pin and then the other on the plug that goes to the regulator. If you get even the slightest amount of light from the test light the regulator is toast.
To do this with a meter: black lead to battery ground, red lead to each pin on the plug, start with the voltage scale higher than 12vdc and move voltage scale down in steps for each pin. Any voltage is a bad regulator.
3. On the other part of the disconnected regulator plug. Set the multimeter for Ohms x1 scale and measure for resistance across the pins of the stator. You should read something around 0.1 to 0.2 ohms for a 32 amp system.
4. Then check for continuity between each pin on the plug and frame/engine ground. The meter needle should not move (infinite resistance)(digitals will show infinite resistance) if the meter needle does move (indicating continuity)(digitals will show some resistance), recheck very carefully. If the meter still shows continuity to ground the stator is shorted (bad).
5. Set the meter to read A/C volts higher than 30 volts (the scale setting for voltage should always be higher than the highest voltage you expect or you may fry the meter). Start the bike, and measure from one pin to the other on the plug (DO NOT cross the multimeter probes! - touch them to each other). You should read roughly 16-20 vac per 1,000 rpm.
6. If the battery was good under load test, if the stator is NOT shorted to ground, and the stator is putting out A/C voltage, then the regulator is bad (most likely even if passed step 2)
For more information about your question and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.youtube.com/watch?v=__alqEo1QR0
How to Fully Troubleshoot Your Motorcycles Charging System MotorcycleMD
https://www.onlymanuals.com/manuals/cars/suzuki/other_model/suzuki_motorcycle_suzuki_gs750
https://www.partsfish.com/oem-parts-for-suzuki
http://mybikemanuals.com/suzuki/suzuki-gs-owners-manuals

1977 Suzuki GS... | Answered on Jun 18, 2019


Hi, Bobby and the usual suspects are:
1. Clutch cable adjusted too tight.
2. Pressure plate center screw adjusted too tight
3. A broken clutch rod.
4. Slave cylinder piston stuck.
5. Clutch plate missing from the clutch pack.
6. Clutch plates have worn past minimum specifications.
7. Clutch plates crystallized due to incompatible oil.
8. Broken transmission shafts or gears.
9. Rear drive belt or chain broke.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Clutch wont engage No resistance at all What should try motorcycles
https://www.youtube.com/watch?v=hhZZ8vt6tH8
http://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/GS750_Service_Manual_early8valve.pdf
https://www.partsfish.com/page/oem-parts-for-suzuki
http://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/GS750E_1978_Owners_Manual.pdf

1977 Suzuki GS... | Answered on Mar 26, 2019


Hi, Jeff for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Suzuki, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.louis.eu/rund-ums-motorrad/bike-datenbank/suzuki-gs-750-e/gs750/0133
Ask Dave Fork Oil Viscosity
http://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/GS750_Service_Manual_early8valve.pdf
https://www.partsfish.com/page/oem-parts-for-suzuki
http://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/GS750E_1978_Owners_Manual.pdf

1977 Suzuki GS... | Answered on Mar 26, 2019


Hi, Anonymous for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Suzuki, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
What do you use for fork oil
Ask Dave Fork Oil Level
http://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/GS750_Service_Manual_early8valve.pdf
https://www.partsfish.com/page/oem-parts-for-suzuki
http://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/GS750E_1978_Owners_Manual.pdf

1977 Suzuki GS... | Answered on Mar 26, 2019


Hi, Anonymous before testing any electrical component in the Charging System it is "IMPERATIVE" that you have a fully charged battery of 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage, the battery is faulty and must be replaced. AGM type batteries fall into this scenario more so than lead-acid batteries.
1. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
2. To check the regulator unplug it from the stator. Take a test light and clip it to the negative terminal of the battery and then touch first one pin and then the other on the plug that goes to the regulator. If you get even the slightest amount of light from the test light the regulator is toast.
To do this with a meter: black lead to battery ground, red lead to each pin on the plug, start with the voltage scale higher than 12vdc and move voltage scale down in steps for each pin. Any voltage is a bad regulator.
3. On the other part of the disconnected regulator plug. Set the multimeter for Ohms x1 scale and measure for resistance across the pins of the stator. You should read something around 0.1 to 0.2 ohms for a 32 amp system.
4. Then check for continuity between each pin on the plug and frame/engine ground. The meter needle should not move (infinite resistance)(digitals will show infinite resistance) if the meter needle does move (indicating continuity)(digitals will show some resistance), recheck very carefully. If the meter still shows continuity to ground the stator is shorted (bad).
5. Set the meter to read A/C volts higher than 30 volts (the scale setting for voltage should always be higher than the highest voltage you expect or you may fry the meter). Start the bike, and measure from one pin to the other on the plug (DO NOT cross the multimeter probes! - touch them to each other). You should read roughly 16-20 vac per 1,000 rpm.
6. If the battery was good under load test, if the stator is NOT shorted to ground, and the stator is putting out A/C voltage, then the regulator is bad (most likely even if passed step 2)
For more information about your question and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
HOW TO CHECK YOUR CHARGING SYSTEM and CHANGING the STATOR and REGULATOR...
How to diagnose and repair motorcycle charging problems
http://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/GS750_Service_Manual_early8valve.pdf
https://www.partsfish.com/page/oem-parts-for-suzuki
http://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/GS750E_1978_Owners_Manual.pdf

1977 Suzuki GS... | Answered on Mar 26, 2019


Hi, Anonymous for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Suzuki, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.google.com/search?q=Vacuum+line+routing+1977+Suzuki+GS+750&tbm=isch&source=univ&sa=X&ved=2ahUKEwiKv7Xd9p_hAhWotlkKHQsiADcQsAR6BAgIEAE&biw=1440&bih=757
https://groups.google.com/forum/#!topic/rec.motorcycles.tech/1H9LxFY224g
http://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/GS750_Service_Manual_early8valve.pdf
https://www.partsfish.com/page/oem-parts-for-suzuki
http://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/GS750E_1978_Owners_Manual.pdf

1977 Suzuki GS... | Answered on Mar 26, 2019


Hi, Vickie for this scenario you will need your service manual that has all fastener torque specs and a wiring diagram on the back pages, parts fiche, and owners manual if you can't find the best tool you ever bought for your Suzuki, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.suzukicycles.org/GS-series/GS750.shtml How To Set Ignition points Suzuki GS550 http://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/GS750_Service_Manual_early8valve.pdf https://www.partsfish.com/page/oem-parts-for-suzuki http://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/GS750E_1978_Owners_Manual.pdf

1977 Suzuki GS... | Answered on Mar 11, 2019


Hi, Webro there is no spec difference, just a different vendor name for this scenario you will need your service manual that has all fastener torque specs and a wiring diagram on the back pages, parts fiche, and owners manual if you can't find the best tool you ever bought for your Suzuki, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.thoughtco.com/setting-the-ignition-points-gap-743523
How To Set Ignition points Suzuki GS550
http://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/GS750_16valve.pdf
https://www.partsfish.com/page/oem-parts-for-suzuki
http://mybikemanuals.com/suzuki/suzuki-gs-owners-manuals

1977 Suzuki GS... | Answered on Oct 08, 2018


call dealer ask for paint codes for that year model, give reg.

1977 Suzuki GS... | Answered on Nov 06, 2017


Hi, Warren do you have a torque wrench and are you using assembly lube? for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere zero $ you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.

WARNING! Inexperienced mechanics or mechanics without the proper tools and equipment may not be able to
properly perform the services described in this manual

http://www.dotheton.com/forum/index.php?topic=3409.0
1980 Suzuki GS750 Restoration Project part 22 head assembly and timing
http://www.vanluik.eu/Suzuki%20GS750%20Service%20Manual.pdf OEM parts for Suzuki
http://mybikemanuals.com/suzuki/suzuki-gs-owners-manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


1977 Suzuki GS... | Answered on Mar 16, 2017


the best way is to measure with a vernia caliper the inside and outside diameter of the top and bottom bearings you already have and compare them with what you were going to buy. for instance the bottom bearing may have a 30mm OD and a 45 mm OD and be 13 mm high.i strongly recommend you fit taper roller bearings to it .

1977 Suzuki GS... | Answered on Feb 20, 2015


If it's a random misfire, I recommend looking for a high voltage problem in the ignition circuit, like a cracked spark plug, or a dirty spark plug boot, or a loose wire on the coils. Start it up in the dark and look for sparks jumping around the plug wires and coils. Point gap will affect timing, check for worn or pitted points while you're in there. Maybe a condenser is going bad.

1977 Suzuki GS... | Answered on Aug 27, 2014


The book states the timing if fixed no maintenance is needed. Timing marks A,top dead center;B fixed advance firing point; C, full advanced firing point. I'll try to post pic from book.

1977 Suzuki GS... | Answered on Jul 11, 2014


http://www.carlsalter.com/motorcycle-manuals.asp
Try this link. Free downloads for 100's of bikes. Checked it and the wiring diagram is there.

1977 Suzuki GS... | Answered on May 25, 2014


carb sync is done using only the carb hard stop adjustment u don't touch the air fuel mixture screw, had this exact same bike had the serive manual am dead sure on this

1977 Suzuki GS... | Answered on Sep 03, 2013


HI,,,you have blocked carbs,,they are running lean,thats why it runs better with the choke on,,carbs need to be removed from the bike disasembled and cleaned.

1977 Suzuki GS... | Answered on Jan 31, 2013


I am thinking your rings must be worn. As long as the oil is correct weight,and valves are set correctly, then that is what you are looking at

1977 Suzuki GS... | Answered on Sep 27, 2012

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