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MG Midget and Sprite Technical - Clutch Master size - 1275cc engined cars
|Is the clutch master cylinder size on the 1275cc engine cars 11/16" diameter?|
Brake drum cars are 7/8
|Are you sure? CLUTCH Master - it is less than 3/4 so must be less than 7/8. If it isn't 11/16 might it be 0.700"?|
It has always been accepted that
A member who owns his own machine shop looked in one of his reference books and said it should, as you say, be 0.7 so that is what I now use on my Sebring rep.
|Thanks Alan. The reason I ask is that I'm going to replace the standard master with a non-standard master. However, while I've got used to the feel of the clutch with the Burton co-ax I have the option when I change the master to have a softer longer travel pedal, like it was originally, by varying from the orignal master size, but needed to be certain what that original size was.|
|"It has always been accepted that|
Clutch or brake?
|Dave O'Neill 2|
At the change to disk brakes the clutch slave also changed.
I think it was easier to bore both sides of the combined MC the same (no chance of FU's)
|Daniel - I found an old separate clutch master from a 1275. Couldn't get the piston out but the end of the bore measured to .698 repeatedly. So it seems that 0.7 is more correct than 11/16". Could it be the piston is 11/16 and the bore 0.7 to give running clearance which allows the seal to do its job? (bit like pistons, rings and bores).|
|Definitely 0.7", 3/4 is the brake if discs, 7/8 for drums.|
|Looking back at Onno's post now that it's morning, the reason for the conflicting posts is clear:|
1275 has 0.7 master and 1" slave
1098 has 3/4 master and 7/8 slave
Hardly suprising, they were different clutches after all!
|I use a 3/4 master and a 1" slave on my 1275 frog. It used to have a 7/8" slave but the 1" slave makes for a more relaxing pedal. The difference from 0.7 to 0.75 is fairly small. It also meant the clutch movement was slightly less with therefore reduced risk of clutch overthrow.|
|An afterthought (actually an after-question) what is the Clutch master and slave size for 1500xx engines#d cars? Is the master the same size but of slightly different internal design?|
|And, of course, you will need one of these (see pic)|
One you prepared earlier ????
Nice to have met at the bolney stage on thursday
rgds tony boyle
You'll have to pay Kent a visit on a nice day.
There are a few cars fitted with them now.
This thread was discussed between 16/05/2016 and 27/06/2016
This thread is from the archive. The Live MG Midget and Sprite Technical BBS is active now.