1977 Suzuki GT 750A replace headlight

Question edited for clarity and add maker.
Question moved from 'Gas Motorcycles' to model category.

$85 upwards. Better to shot blast strip and epoxy line your existing one and add a fuel filter.

https://www.google.com/search?q=1977+Suzuki+GS750+aftermarket+gas+tank

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Most headlights are built as a fixed Left or Right and most can't be converted as it is the reflectors inside the headlight that controls the direction of aim. To do it correctly you will need to replace both headlights with the correct aim units.

LAMPS/LIGHTING - EXTERIOR PT
HEADLAMP LEVELING MOTOR - EXPORT
REMOVAL
(1) Remove headlamp unit
(2) Disconnect headlamp levelling motor electrical
connector.
(3) Rotate levelling motor one quarter turn counter clockwise.
This will free levelling motor housing from
the headlamp unit.
(4) Pull levelling motor straight from headlamp
unit. Significant force will be required to unsnap
motor control arm from lens reflector.
NOTE: The headlamp levelling motor control arm is
snapped into the lens reflector mechanism very
securely. Use a firm, steady pull to disengage motor
arm from reflector.
(5) Remove levelling motor from headlamp unit.
INSTALLATION
(1) While holding headlamp reflector assembly
still, push levelling motor until control arm is fully
seated into reflector mechanism. An audible "snap"
will be heard.
(2) Push and rotate levelling motor one quarter
turn clockwise to lock motor to the headlamp unit.
(3) Connect headlamp levelling motor electrical
connector.
(4) Install headlamp unit in the vehicle Locksmith Buffalo Ny 24 Hour Locksmith in Buffalo Ny 716 249 2944

in older vehicles you put a 100- 125 watt H4 bulb (with relays ) as the reflector was metal and could stand the heat
modern cars use plastic reflectors so going over 65-85 H4 would probably melt the reflectors
Leds are a better option as they produce little heat but the installation is not straight forward as they need ballasts fitted to activate properly
I would have a talk with an auto electrician that knows how to fit the led lights and what is required.

No, I don't think so.

check that the reflector around the globe is shiny and not brown or rusted.. Is replace the whole head light.

Changing the headlight bulb is a little bitdifficult for those not familiar with the vehicle. Both the high and low beamsare encased in a sealed unit, which also contains the turn signal, parkinglights, and side reflector. To change a single headlight, the entire headlightcompartment must be removed from the car. Once you understand how to remove thesealed headlight unit from the car, replacing the bulb is relatively simple.Follow the steps below on how to change the headlamp bulb in this car. Removal 1. Open the hood of the Jeep and locate thelong, headlamp jackscrew. The screw is located almost directly above theheadlight unit and can be removed using a 7-mm socket wrench. This will allowyou to remove the bezel from the grill opening panel. Remove the three screwsattached to the retaining ring to the headlight console. The screws are locatedon the bottom front and side of the unit. In some models the screws have beenreplaced with ball-stud alignment posts, enabling you to remove the headlightunit by simply wiggling it loose. 3. Disconnect the headlamp bulb wireharness connector located at the front of the headlight unit. This is locateddirectly above and between the parking and turning bulbs. 4. Separate the sealed headlight unit fromthe vehicle; disconnect and replace the old bulb. The high beam is locatedtoward the center of the car. The low beam is the bulb on the outermost edge ofthe unit. This is how to Install 1. Reconnect the headlamp bulb's wireharness-connector. Then Replace the headlight unit in the headlight canister. Positionthe retaining ring back in its original position and install the three screwsagain. If you wiggled the unit out, ensure that it is replaced firmly. 2. Install the headlamp bezel by replacingthe 7-mm jackscrew on the inside of the hood. Make sure all connections aretight before starting the car and inspecting the replacement.

u need info at library sec629 motorbooks or review clymer manuals for both--salvage yards have help also for olscoolers

To replace the headlight on a 1993 Tracer you must turn the black plastic retainer ring counter clockwise and then pull back gently. The ring and bulb should then slide out toward the engine.
Carefully grab the sides of the plug and pull the bulb out.
When replacing the bulb make sure not to touch the glass part or it will cause the bulb to burn out sooner. Place the black ring back over the bulb with the open end towards the glass part of the bulb. Fit the wiring onto the back of the bulb and insert the bulb back into the reflector. The black plastic ring has notches that fit over protrusions. Turn the black ring clockwise and your done. Test the headlight. Happy Driving