Fully agree that the visual fuel level is a far better way of setting things up however the documented Suzuki method is as I have stated, I believe the floats I have set are correct to that method.
To be able you use the visual tube Fuel level height method, I would want to know what exactly is the height you are trying to achieve? as I have looked and I cannot see a confirmed height, Paul states that "most bikes" are set at 3mm is the GT one of those most bikes as I have seen measurements quoted on the internet for various bikes regarding float height of fuel level as being between 1 and 5mm even my local motorcycle dealer suggested that a measurement of 1-2mm would suit
Therefore I had no choice but to follow the official Suzuki advice, as a tool maker I found no difficulty in setting the floats accurately. The plug colour would also suggest its set correctly
Interestingly Kawasaki specify a fuel height for their KH range and yes I agree is a better way of setting the height, but only if you know what that height should be from a specification. Which Kawasaki do specify
Float height adjustment
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Re: Float height adjustment
At the grave risk of appearing to contradict myself, the actual fuel level that you set it to doesn't matter as long as they are all set the same.. By that I mean that you will know what the fuel level was and can adjust from that starting point should you so desire/need. I set fuel nominally as 3mm below the gasket surface. If I think I need it to be higher or lower, I can adjust it and keep a record of the new level and the change it makes.
I have only set half a dozen sets of GT750 BS40 carbs using the float height method and after making sure they were all 100% spot on spec, I checked the fuel levels and found them not to be consistent. Whether that was twisted floats or difference in buoyancy or other reasons I didn't find out. I just made sure they were as straight as possible and set the fuel levels to be the same and it made a slight but noticeable difference to how they ran.
I totally understand that you had to do what you had to do and it's a testament to the relative insensitivity of a GT750 to minor adjustments. Get the timing out by a long way and it's often hard to tell the difference. Same with jetting. They are big old softies and usually, on a stock or close to stock motor, close enough is just fine.
I have only set half a dozen sets of GT750 BS40 carbs using the float height method and after making sure they were all 100% spot on spec, I checked the fuel levels and found them not to be consistent. Whether that was twisted floats or difference in buoyancy or other reasons I didn't find out. I just made sure they were as straight as possible and set the fuel levels to be the same and it made a slight but noticeable difference to how they ran.
I totally understand that you had to do what you had to do and it's a testament to the relative insensitivity of a GT750 to minor adjustments. Get the timing out by a long way and it's often hard to tell the difference. Same with jetting. They are big old softies and usually, on a stock or close to stock motor, close enough is just fine.
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Re: Float height adjustment
Where did you get the lovely drain plug adapters? I'm in the States and can not find them with the right thread pitch.PaulD738 wrote: ↑Mon Aug 09, 2021 8:03 pm The float height is just a guide so you can get the FUEL level in the carb bowl correct. I made these up for my Katana but I’ve also got some made up for my T500 and Kettle. You remove the drain plug and screw the adapter in. When the carb bowl fills up you can see the fuel level in the clear pipe. Most bikes are set at 3mm from the joint where the bowl seats against the carb body.
Sidenote: I'm new here. I'm working on a customer's GT750. Its a lovely bike but and the carbs keep leaking. Float levels are way high but I'm aware the proper way is with the adapters and measuring actual level.
Thank you for the help
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Re: Float height adjustment
NO SMOKE .......NO POKE
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Re: Float height adjustment
Those should fit a GT550 and early J&K 750s. Evans Ward on the prior page makes some and he's in the US. I had a spacial banjo bolt machined and I finally got some adapters from Evans and his are much easier to use on a 750 with CV carbs.
I bought a set of 3, but you really only need one.
I bought a set of 3, but you really only need one.
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Re: Float height adjustment
teazer wrote: ↑Wed Dec 08, 2021 4:20 pm Those should fit a GT550 and early J&K 750s. Evans Ward on the prior page makes some and he's in the US. I had a spacial banjo bolt machined and I finally got some adapters from Evans and his are much easier to use on a 750 with CV carbs.
I bought a set of 3, but you really only need one.
Awesome. Thank you both. This is a 72 so a early model. and I've ordered from Z1 for vintage stuff before so ill try there.barney01 wrote: ↑Wed Dec 08, 2021 9:08 am https://www.z1enterprises.com/fuel-leve ... uzuki.html
Here you go
Heres a pic of the 750 I'm working on. Not all original but she runs
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Re: Float height adjustment
J&R Power Pipes by any chance?
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Re: Float height adjustment
I think you can buy them but I made my own on my little model makers latheSpeedOfDave wrote: ↑Wed Dec 08, 2021 2:56 amWhere did you get the lovely drain plug adapters? I'm in the States and can not find them with the right thread pitch.PaulD738 wrote: ↑Mon Aug 09, 2021 8:03 pm The float height is just a guide so you can get the FUEL level in the carb bowl correct. I made these up for my Katana but I’ve also got some made up for my T500 and Kettle. You remove the drain plug and screw the adapter in. When the carb bowl fills up you can see the fuel level in the clear pipe. Most bikes are set at 3mm from the joint where the bowl seats against the carb body.
Sidenote: I'm new here. I'm working on a customer's GT750. Its a lovely bike but and the carbs keep leaking. Float levels are way high but I'm aware the proper way is with the adapters and measuring actual level.
Thank you for the help
They're rubbish them Jap bikes lad they won't last five minutes! you want to get yourself a nice Royal Enfield!
A quote from my old dad
I started out with nothing and I’ve got most of it left!
A quote from my old dad
I started out with nothing and I’ve got most of it left!
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Re: Float height adjustment
I just saw these replies. sorry.
I thought they were stock pipes. There's no markings on them but the customer bought it like this so unknown what pipes they are.
I got some from Z1 but a nice bench top lathe and a mill is on the equipment lost if the shop keeps doing well in next couple years