XR11/73

[Suzukidave]

While your doing all that you might think about sticking in a GS750 transmission I am thinking i read that the clutch basket needs the springs to save wear n tear on the transmission ?

[garry55]

Dave

is the GS750 transmission a straight swap? And what is the benefit of fitting it?

Not sure if the clutch basket springs are required on a race clutch - maybe I will get to find out !

[Suzukidave]

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[garry55]

thanks Dave

good read that. Correct me if I am wrong, but the only gains from this modification are an improved 1st to 2nd ratio change and the choice of sprockets?

[garry55]

with the clutch unit away for machining, I've turned my attention to the clutch lifting mechanism. Those in the know know that the Kettle lifts its clutch pressure plate via a mechanism on the r/h side of the motor, rather than pushing it from the l/h side via push rods and bearings. So I set about making my own dry clutch unit.

First off, a Kettle clutch cover..........



suitably shortened..........



next to go, part of the clutch arm mechanism outer cover housing.............



which I had to do in 2 parts so as to leave the bit that has the hole for the clutch cable adjuster. Although the clutch operating arm return spring peg had to go too, as it's cast as part of the housing.....



drilled some holes, not for lightening purposes (though every little helps), but to promote airflow to the clutch basket. Those in the know know that the Kettle clutch sits inboard of the r/h crankcases, so will get no direct airflow as a dry unit and therefore will be prone to overheating........



cut a piece from the rear of the casing - this is where the air that is drawn into the clutch basket will be expelled and drilled a hole for the replacement clutch return spring post (which is a 6 mm cap head bolt)............



I may have to add some strengthening to the inside, around the actuator itself, but for now this is it......

[Suzukidave]

Hack saw master

[MikeD]

thanks Dave

good read that. Correct me if I am wrong, but the only gains from this modification are an improved 1st to 2nd ratio change and the choice of sprockets?

Benefits: favorable ratios especially between 1-2, better sprocket mounting, more sprocket choices, longer output shaft options for builds needing wider sprocket offset

[Suzukidave]

thanks Dave

good read that. Correct me if I am wrong, but the only gains from this modification are an improved 1st to 2nd ratio change and the choice of sprockets?

Benefits: 6 speed,

The 6 speed will fit in ?

[MikeD]

thanks Dave

good read that. Correct me if I am wrong, but the only gains from this modification are an improved 1st to 2nd ratio change and the choice of sprockets?

Benefits: 6 speed,

The 6 speed will fit in ?

GS750 wasn't a 6 speed?

Eta: it's early, I should avoid the keboard until adequate coffee has reached the brain. It's not a 6spd

[garry55]

thanks guys - I will look at that later, but for now I will stick with the GT750 gearbox. I can get any (chain) size sprocket made to fit the GT output shaft, with whatever offset I specify, so it doesn't seem worth the hassle at the moment.

[garry55]

collected this today



all new seals / bearings / rod kits + the flywheels have been pinned and welded

Then called at the welders to test-fit the new front mounting plate. To my surprise, the L-shaped front cross-piece had already been attached. This is it nestled in behind the steering head - the 3 coil packs will be mounted to this vertical surface.................



and here's the underside view - the front mounting brackets will be welded to this.........



and will pick up the rubber mounting that will be attached to the front of the new plate.........



well - the theory's good..............

[Alan H]

It should be running in the next few days, shirley?

[garry55]

Hey guys - some GT750 help required please.

how important is the oil splash feed to the r/h end of the transmission input shaft ? By fitting a dry clutch unit I will lose this feed. Will it be detrimental?

[Suzukidave]

Pretty important i think as the hollow shaft directs oil to the gears and the bearing in the center of the clutch .

[tz375]

The same (almost) trans as ours on a 4 stroke often is fed oil from an oil pump. The question that may be worth asking is how did a TR750 trans get its oil with a dry clutch.