Clutch plates

Previously albert_sheean wrote:

Previously George Phillips wrote:

Just dismantled the clutch on my '55 ES2 (trying to eliminate drag as usual) and found that adjacent the clutch sprocket was a plate with friction pads on one side (away from the clutch sprocket) and a plain side facing the sprocket which of course has inserts.

This does not show up in my parts list which shows only clutch plates and friction plates. What's this all about? Is it from a different clutch?

If I remove it I'm down to four friction plates rather than the five shown in the parts list.

Anyone come across this before? Could it be contributory to drag?

By the way, the parts book shows a circlip between the clutch outer plate (with the three holes in it) and the first steel clutch plate (plain). There's no such thing on mine. Should there be - for a '55 model and would it work without it as the outer plate seems to hold everything in place?

Cheers

George

George,

You mentioned that your existing clutch basket/sprocket has inserts, which would be correct for that year. The plain steel plates for that year should have the tabs around the inside to engage with the cush hub. The friction plates should have their tabs around the outside to engage with the clutch basket.

This plate you mentioned, the one with inserts on one and plain on the other side? There is one like it in the late type (1959) models. It has the engagement tabs on the inside and it goes right underneath the clutch pressure plate. According to the parts drawings I have.

Assuming your 1955 model has a similar clutch to the 1957 models. It should have in order from the clutch basket insert side, plain with inside tabs, insert with outside tabs, this is repeated until there are four of each type held in place by the pressure plate.

The plate you mentioned with the inserts on one side and plain on the other is described as the "Clutch Plate End Assembly" and is part No. 21260 from the 1959 Norton Spare Parts List and it is common to the range.

Hope this helps.

regards,

Albert.

Thanks Albert. Sounds like I have a bit of a bodge of clutch parts.

Just trying to alleviate the problem of getting it into first gear.

George

Previously albert_sheean wrote:

Previously George Phillips wrote:

Just dismantled the clutch on my '55 ES2 (trying to eliminate drag as usual) and found that adjacent the clutch sprocket was a plate with friction pads on one side (away from the clutch sprocket) and a plain side facing the sprocket which of course has inserts.

This does not show up in my parts list which shows only clutch plates and friction plates. What's this all about? Is it from a different clutch?

If I remove it I'm down to four friction plates rather than the five shown in the parts list.

Anyone come across this before? Could it be contributory to drag?

By the way, the parts book shows a circlip between the clutch outer plate (with the three holes in it) and the first steel clutch plate (plain). There's no such thing on mine. Should there be - for a '55 model and would it work without it as the outer plate seems to hold everything in place?

Cheers

George

George,

You mentioned that your existing clutch basket/sprocket has inserts, which would be correct for that year. The plain steel plates for that year should have the tabs around the inside to engage with the cush hub. The friction plates should have their tabs around the outside to engage with the clutch basket.

This plate you mentioned, the one with inserts on one and plain on the other side? There is one like it in the late type (1959) models. It has the engagement tabs on the inside and it goes right underneath the clutch pressure plate. According to the parts drawings I have.

Assuming your 1955 model has a similar clutch to the 1957 models. It should have in order from the clutch basket insert side, plain with inside tabs, insert with outside tabs, this is repeated until there are four of each type held in place by the pressure plate.

The plate you mentioned with the inserts on one side and plain on the other is described as the "Clutch Plate End Assembly" and is part No. 21260 from the 1959 Norton Spare Parts List and it is common to the range.

Hope this helps.

regards,

Albert.

Thanks Albert. Sounds like I have a bit of a bodge of clutch parts.

Just trying to alleviate the problem of getting it into first gear.

George

Previously albert_sheean wrote:

Previously George Phillips wrote:

Just dismantled the clutch on my '55 ES2 (trying to eliminate drag as usual) and found that adjacent the clutch sprocket was a plate with friction pads on one side (away from the clutch sprocket) and a plain side facing the sprocket which of course has inserts.

This does not show up in my parts list which shows only clutch plates and friction plates. What's this all about? Is it from a different clutch?

If I remove it I'm down to four friction plates rather than the five shown in the parts list.

Anyone come across this before? Could it be contributory to drag?

By the way, the parts book shows a circlip between the clutch outer plate (with the three holes in it) and the first steel clutch plate (plain). There's no such thing on mine. Should there be - for a '55 model and would it work without it as the outer plate seems to hold everything in place?

Cheers

George

George,

You mentioned that your existing clutch basket/sprocket has inserts, which would be correct for that year. The plain steel plates for that year should have the tabs around the inside to engage with the cush hub. The friction plates should have their tabs around the outside to engage with the clutch basket.

This plate you mentioned, the one with inserts on one and plain on the other side? There is one like it in the late type (1959) models. It has the engagement tabs on the inside and it goes right underneath the clutch pressure plate. According to the parts drawings I have.

Assuming your 1955 model has a similar clutch to the 1957 models. It should have in order from the clutch basket insert side, plain with inside tabs, insert with outside tabs, this is repeated until there are four of each type held in place by the pressure plate.

The plate you mentioned with the inserts on one side and plain on the other is described as the "Clutch Plate End Assembly" and is part No. 21260 from the 1959 Norton Spare Parts List and it is common to the range.

Hope this helps.

regards,

Albert.

Thanks for that, Albert. You note that the "one sided" plate has the tabs on the inside meaning that is is "driven" by the gearbox rather than by the drive sprocket. All the other plates which have inserts are driven by the drive sprocket not the gear box. Does this mean I have a mis-match. Will it cause a prob? I read somewhere that in the late 50's Norton changed the design of the clutch such that all the "insert" plates had inside tabs (driven by gearbox) and the plain plates had outside tabs. I'm just not sure if you can mix them? My arrangement also means that the basket assembly is one plate short (joke there somewhere!). Again, note sure if this will cause a prob?

Cheers

George

Previously albert_sheean wrote:

Previously George Phillips wrote:

Just dismantled the clutch on my '55 ES2 (trying to eliminate drag as usual) and found that adjacent the clutch sprocket was a plate with friction pads on one side (away from the clutch sprocket) and a plain side facing the sprocket which of course has inserts.

This does not show up in my parts list which shows only clutch plates and friction plates. What's this all about? Is it from a different clutch?

If I remove it I'm down to four friction plates rather than the five shown in the parts list.

Anyone come across this before? Could it be contributory to drag?

By the way, the parts book shows a circlip between the clutch outer plate (with the three holes in it) and the first steel clutch plate (plain). There's no such thing on mine. Should there be - for a '55 model and would it work without it as the outer plate seems to hold everything in place?

Cheers

George

George,

You mentioned that your existing clutch basket/sprocket has inserts, which would be correct for that year. The plain steel plates for that year should have the tabs around the inside to engage with the cush hub. The friction plates should have their tabs around the outside to engage with the clutch basket.

This plate you mentioned, the one with inserts on one and plain on the other side? There is one like it in the late type (1959) models. It has the engagement tabs on the inside and it goes right underneath the clutch pressure plate. According to the parts drawings I have.

Assuming your 1955 model has a similar clutch to the 1957 models. It should have in order from the clutch basket insert side, plain with inside tabs, insert with outside tabs, this is repeated until there are four of each type held in place by the pressure plate.

The plate you mentioned with the inserts on one side and plain on the other is described as the "Clutch Plate End Assembly" and is part No. 21260 from the 1959 Norton Spare Parts List and it is common to the range.

Hope this helps.

regards,

Albert.

Thanks for that, Albert. You note that the "one sided" plate has the tabs on the inside meaning that is is "driven" by the gearbox rather than by the drive sprocket. All the other plates which have inserts are driven by the drive sprocket not the gear box. Does this mean I have a mis-match. Will it cause a prob? I read somewhere that in the late 50's Norton changed the design of the clutch such that all the "insert" plates had inside tabs (driven by gearbox) and the plain plates had outside tabs. I'm just not sure if you can mix them? My arrangement also means that the basket assembly is one plate short (joke there somewhere!). Again, not sure if this will cause a prob?

Cheers

George