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Onderhoud en reparatie Suzuki GT750-B (TJR)

After a couple of hours we have a a clean carburetor set which we can use for this GT750.
After a couple of hours we have a a clean carburetor set which we can use for this GT750.
After a couple of hours we have a a clean carburetor set which we can use for this GT750.
After a couple of hours we have a a clean carburetor set which we can use for this GT750.
After a couple of hours we have a a clean carburetor set which we can use for this GT750.
After a couple of hours we have a a clean carburetor set which we can use for this GT750. Together with the right adjusted ignition is this one of the conditions for running the engine. Sadly we need to replace the floats, as we can't adjust the right float height we need to replace the floats.
After a couple of hours we have a a clean carburetor set which we can use for this GT750. Together with the right adjusted ignition is this one of the conditions for running the engine. Sadly we need to replace the floats, as we can't adjust the right float height we need to replace the floats.
Hard to see it, but: NEVER use pliers to remove the needle jet! This needle jes was severe damaged and bent, we replaced the needle jet.
Hard to see it, but: NEVER use pliers to remove the needle jet! This needle jes was severe damaged and bent, we replaced the needle jet.
Again we needed to insert two helecoil M4 on the float bowl seat.
Again we needed to insert two helecoil M4 on the float bowl seat.
Of course we installed the filter on the float needle seat.
Of course we installed the filter on the float needle seat.
As you can see two carburetors are cleaned alredy. See the difference.
As you can see two carburetors are cleaned alredy. See the difference.
As you can see two carburetors are cleaned alredy. See the difference.
Disassembled all three carburetors.
Disassembled all three carburetors.
Very dirty in the fuel tank supply channel.
Very dirty in the fuel tank supply channel.
Missing filter, float needle seat.
Missing filter, float needle seat.
Dirty outside, but what is inside the carburetor after the ultrasonic cleaning. So we will clean the carburetor by hand, poke all holes, inspect all channels.
Dirty outside, but what is inside the carburetor after the ultrasonic cleaning. So we will clean the carburetor by hand, poke all holes, inspect all channels.
Missing spring.
Missing spring.
This is what happens when you have a rusty fuel tank, rust goes directly into the cilinders. This is bad.
This is what happens when you have a rusty fuel tank, rust goes directly into the cilinders. This is bad.
Dirty carburetors, you can see where the carburetors have leaked.
Dirty carburetors, you can see where the carburetors have leaked.
SITE UPDATE 05082026: Rebuilding the carburetors. Someone did a very bad job on this carburetor set. Float height TO HIGH 30+mm, missing parts, leaking due to bad screw threading, dirty etc. On this carburetor set the engine will NOT RUN. IMPORTANT to know, ultrasonic cleaning is not enough, after that you need to clean carburetors by hand.
SITE UPDATE 05082026: Rebuilding the carburetors. Someone did a very bad job on this carburetor set. Float height TO HIGH 30+mm, missing parts, leaking due to bad screw threading, dirty etc. On this carburetor set the engine will NOT RUN. IMPORTANT to know, ultrasonic cleaning is not enough, after that you need to clean carburetors by hand.
The elektrical panel wasn't installed on it's HOOK. We corrected this by hanging the panel in it's hook again.
The elektrical panel wasn't installed on it's HOOK. We corrected this by hanging the panel in it's hook again.
Installation completed.
Installation completed.
Installed the by-pass S-hose connection.
Installed the by-pass S-hose connection.
Installed the rebuild oil lines on the engine.
Installed the rebuild oil lines on the engine.
Installed the rebuild elektrical starter.
Installed the rebuild elektrical starter.
Replaced a lot of wrong installed bike parts by the "genuine" rings. NOTE: Someone haven't remember how it was before.
Replaced a lot of wrong installed bike parts by the "genuine" rings. NOTE: Someone haven't remember how it was before.
Replaced a lot of wrong installed bike parts by the "genuine" rings. NOTE: Someone haven't remember how it was before.
We also installed a new ground wire (10mm2) on the connection between the batterie and the batterie casing.
We also installed a new ground wire (10mm2) on the connection between the batterie and the batterie casing.
All the engine wiring harnasses should be routed direct behind the engine.
All the engine wiring harnasses should be routed direct behind the engine.
We installed an elektronic SPARCON ignition system. As we removed a lot of parts on the bike we could re-route all the engine wiring harnasses.
We installed an elektronic SPARCON ignition system. As we removed a lot of parts on the bike we could re-route all the engine wiring harnasses.
Some wiring wrong routed, the wiring harnas can be damaged by the chain, because it's to close at the chain.
Some wiring wrong routed, the wiring harnas can be damaged by the chain, because it's to close at the chain.
Some wiring wrong routed, the wiring harnas can be damaged by the chain, because it's to close at the chain.
waterpump cover installed again. We think it will not leak any coolant anymore.
waterpump cover installed again. We think it will not leak any coolant anymore.
All cleaned now, we can install the waterpump cover agian with sealant and a new gasket.
All cleaned now, we can install the waterpump cover agian with sealant and a new gasket.
Removeing the waterpump cover. It was a terrible job to clean the gasket surface.
Removeing the waterpump cover. It was a terrible job to clean the gasket surface.
Leaking coolant on the waterpump cover. When you install the cover in the wrong way or use rings under the bolts the waterpump cover will leak coolant. So never use rings.
Leaking coolant on the waterpump cover. When you install the cover in the wrong way or use rings under the bolts the waterpump cover will leak coolant. So never use rings.
AGAIN: Bolt 13, when you don't use the maintenace manual you will install this bolt in the wrong way. This bolt has only a copper or aluminum ring with enough sealant so it won't leak gearbox oil.
AGAIN: Bolt 13, when you don't use the maintenace manual you will install this bolt in the wrong way. This bolt has only a copper or aluminum ring with enough sealant so it won't leak gearbox oil.
Another point of view, empty clutch basket.
Another point of view, empty clutch basket.
Empty clutch basket.
Empty clutch basket.
Removing all the clutch parts.
Removing all the clutch parts.
SITE UPDATE 27072026: Checking for the severe sticking clutch. As we have ourself two sticky clutches where we can't find any solutions.
SITE UPDATE 27072026: Checking for the severe sticking clutch. As we have ourself two sticky clutches where we can't find any solutions.
KEEP OFF: When you can't repair engine parts. This membrane is severe damaged and need to be replaced. To be continued.
KEEP OFF: When you can't repair engine parts. This membrane is severe damaged and need to be replaced. To be continued.
All the rust is collected in the fuelcock, the fuelcock will be clogged, the engine will run lean and you get engine damage.
All the rust is collected in the fuelcock, the fuelcock will be clogged, the engine will run lean and you get engine damage.
All the rust is collected in the fuelcock, the fuelcock will be clogged, the engine will run lean and you get engine damage.
All the rust is collected in the fuelcock, the fuelcock will be clogged, the engine will run lean and you get engine damage.
Inspecting the tank inside: RUST, a lot of rust.
Inspecting the tank inside: RUST, a lot of rust.
Inspecting the tank inside: RUST, a lot of rust.
Inspecting the tank inside: RUST, a lot of rust.
Inspecting the tank inside: RUST, a lot of rust.
Inspecting the tank inside: RUST, a lot of rust.
Draining the fuel tank, the fuel is brown from all the rust. Rust parts are collected on the bottom of this crate.
Draining the fuel tank, the fuel is brown from all the rust. Rust parts are collected on the bottom of this crate.
Draining the fuel tank, the fuel is brown from all the rust. Rust parts are collected on the bottom of this crate.
SITE UPDATE 27072026: Remember the DIRTY (rust) carburetors? When you don't DE-rust and seal your fuel tank you always get dirty and clogged carburetors. We experienced: You can drive 160km with a dirty fuel tank, then you get problems.
SITE UPDATE 27072026: Remember the DIRTY (rust) carburetors? When you don't DE-rust and seal your fuel tank you always get dirty and clogged carburetors. We experienced: You can drive 160km with a dirty fuel tank, then you get problems.
SITE UPDATE 12072026: After a couple of days we found some oil beneath the engine, this on a welknown spot: BOLT 13. And yes again, bolt 13 is installed in the wrong way. You only should use a aluminum washer and sealant to close this engine bolt. You also can see leaking coolant, they used washers on the bolts of the waterpump cover. Simply: WRONG!
SITE UPDATE 12072026: After a couple of days we found some oil beneath the engine, this on a welknown spot: BOLT 13. And yes again, bolt 13 is installed in the wrong way. You only should use a aluminum washer and sealant to close this engine bolt. You also can see leaking coolant, they used washers on the bolts of the waterpump cover. Simply: WRONG!
No foam seals are used in the airfilter box. The engine gets dirty air.
No foam seals are used in the airfilter box. The engine gets dirty air.
No foam seals are used in the airfilter box. The engine gets dirty air.
Missing connector holder for the ignition. An elektronic ignition will be installed.
Missing connector holder for the ignition. An elektronic ignition will be installed.
The rectifier is loose, this can give some ground problems.
The rectifier is loose, this can give some ground problems.
Elektrical starter, very dirty and totaly worn brushes. We will clean the elektrical starter and install two new brushes. Take a good look: The connected brush wire is almost hitting the brush holder, the brush itself doesn't hit the collector anymore.
Elektrical starter, very dirty and totaly worn brushes. We will clean the elektrical starter and install two new brushes. Take a good look: The connected brush wire is almost hitting the brush holder, the brush itself doesn't hit the collector anymore.
Which wasn't installed properly, the clamp was fitted on one half of the clamp.
Which wasn't installed properly, the clamp was fitted on one half of the clamp.
Elektrical starter an de the by-pass hose,................
Elektrical starter an de the by-pass hose,................
For rebuilding the oil lines we need to remove a lot of parts. Also drain the coolant.
For rebuilding the oil lines we need to remove a lot of parts. Also drain the coolant.
We found a lot of rust in the carburetors.
We found a lot of rust in the carburetors.
When your fuel tank is filled with rust you find this also in your carburetors. We need to clean and rebuild the carburetors.
When your fuel tank is filled with rust you find this also in your carburetors. We need to clean and rebuild the carburetors.
Fuel leaking center carburetor
Fuel leaking center carburetor
Wrong installed and a missing spring on the oilpump - carburetor rod.
Wrong installed and a missing spring on the oilpump - carburetor rod.
There is something leaking behind the round clutch cover. We need to replace the seal.
There is something leaking behind the round clutch cover. We need to replace the seal.
We found a lot of RED oil on the floor on the parking spot of this bike, after inspection it is gearbox oil.
We found a lot of RED oil on the floor on the parking spot of this bike, after inspection it is gearbox oil.
We found a lot of RED oil on the floor on the parking spot of this bike, after inspection it is gearbox oil.
Another POV - The next check to do is inspecting the fuel tank: This was not good, a lot of rust inside. So we need to do a anti rust treatment and after that seal the fuel tank.
Another POV - The next check to do is inspecting the fuel tank: This was not good, a lot of rust inside. So we need to do a anti rust treatment and after that seal the fuel tank.
First POV -The next check to do is inspecting the fuel tank: This was not good, a lot of rust inside. So we need to do a anti rust treatment and after that seal the fuel tank.
First POV -The next check to do is inspecting the fuel tank: This was not good, a lot of rust inside. So we need to do a anti rust treatment and after that seal the fuel tank.
We found the problem of collected fuel in the engine, the fuelcock is seaping fuel through. The fuelcock will be rebuild.
We found the problem of collected fuel in the engine, the fuelcock is seaping fuel through. The fuelcock will be rebuild.
For so far: Done a good job to do so: The CENTER cilinder had some fuel inside.
For so far: Done a good job to do so: The CENTER cilinder had some fuel inside.
For so far: Done a good job to do so: The LEFT cilinder had a large amount of fuel inside. This probably had caused a hydraulic lock on starting the engine before draining.
For so far: Done a good job to do so: The LEFT cilinder had a large amount of fuel inside. This probably had caused a hydraulic lock on starting the engine before draining.
On a "new" and unknown arrived Suzuki GT we ALWAYS drain the engine this to prevent engine damage.
On a "new" and unknown arrived Suzuki GT we ALWAYS drain the engine this to prevent engine damage.
Very nice restored en rebuild Suzuki GT750-B.
Very nice restored en rebuild Suzuki GT750-B.
Very nice restored en rebuild Suzuki GT750-B.
Very nice restored en rebuild Suzuki GT750-B. From Hungary.
Very nice restored en rebuild Suzuki GT750-B. From Hungary.
Very nice restored en rebuild Suzuki GT750-B.
Very nice restored en rebuild Suzuki GT750-B.
Just for tagging: Motor revisie GT750 GT550 GT380 T20 T500 GT2500 T350 krukas revisie cilinder boren en honen polijsten onderdelen waterpomp zuigers onderhoud reparatie vervanging
Just for tagging: Motor revisie GT750 GT550 GT380 T20 T500 GT2500 T350 krukas revisie cilinder boren en honen polijsten onderdelen waterpomp zuigers onderhoud reparatie vervanging
Maintenance and repair on a restored and rebuild GT750-B.
Maintenance and repair on a restored and rebuild GT750-B.

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