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Post by tipfinchy on Apr 17, 2020 14:37:32 GMT 1
in my ignorance would a hydraulic clutch conversion sort out having to use both hands to pull the clutch lever in when heavy duty springs are used on ypvs a engine
thanks mart
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Post by JonW on Apr 17, 2020 14:42:05 GMT 1
It would help for sure, or you could lengthen the lever on the clutch. Some one mentioned doing just that the other day.
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Post by 4l04ever on Apr 17, 2020 14:43:31 GMT 1
It should help. I have had issues in the past with pattern cables caused very heavy clutch pull to the point that the cable snapped! It appeared to be related to the pattern cable running round a tight bend. I proved this theory by running the cable straight and connecting it to separate handlebars with a clutch lever on.
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Post by midlifecrisisrd on Apr 17, 2020 15:45:56 GMT 1
Pattern cables tend not to have a Teflon liner so are stiff
As said you should be able to make the arm longer but that would need the clutch stripped and a bit of fabrication
Steve
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Post by jon on Apr 17, 2020 16:14:07 GMT 1
Pattern cables tend not to have a Teflon liner so are stiff As said you should be able to make the arm longer but that would need the clutch stripped and a bit of fabrication Steve Steve the old grey cells could be playing up, but I’m sure I’ve pulled a lever out and put it back in with disassembly of the clutch??? Either way you’ve got nothing to lose if you cant get it back in after removal and lengthening of the arm. Makes me chuckle this, as I remember shortening a lambretta lever that had an extended basket and two extra plates in order to get more separation between the plates and avoid clutch drag. Jon |
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Post by jon on Apr 17, 2020 16:16:36 GMT 1
in my ignorance would a hydraulic clutch conversion sort out having to use both hands to pull the clutch lever in when heavy duty springs are used on ypvs a engine thanks mart When you say heavy duty springS, do you mean all 6? Common practice is to have 3 standard and 3 TZ750 from memory? You clutch cover would allow speedy replacement of springs. Jon |
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Post by tipfinchy on Apr 17, 2020 16:49:59 GMT 1
in my ignorance would a hydraulic clutch conversion sort out having to use both hands to pull the clutch lever in when heavy duty springs are used on ypvs a engine thanks mart When you say heavy duty springS, do you mean all 6? Common practice is to have 3 standard and 3 TZ750 from memory? You clutch cover would allow speedy replacement of springs. Jon hi Jon , that I don't know as they was fitted when I got the bike , but its certainly a pain at junctions , if I was to take them out how would I know if they was mixed or all heavy duty and would HD springs be needed with the lock up clutch that's fitted? , sorry to sound so thick but only once played with a clutch on a bike and I took the whole basket out with plates and stuff still in it to get to a 2 piece washer behind said basket thanks mart |
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Post by midlifecrisisrd on Apr 17, 2020 17:02:16 GMT 1
Pattern cables tend not to have a Teflon liner so are stiff As said you should be able to make the arm longer but that would need the clutch stripped and a bit of fabrication Steve Steve the old grey cells could be playing up, but I’m sure I’ve pulled a lever out and put it back in with disassembly of the clutch??? Either way you’ve got nothing to lose if you cant get it back in after removal and lengthening of the arm. Makes me chuckle this, as I remember shortening a lambretta lever that had an extended basket and two extra plates in order to get more separation between the plates and avoid clutch drag. Jon The bottom of the arm hits the push rod Steve |
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Post by jon on Apr 17, 2020 17:27:19 GMT 1
Steve the old grey cells could be playing up, but I’m sure I’ve pulled a lever out and put it back in with disassembly of the clutch??? Either way you’ve got nothing to lose if you cant get it back in after removal and lengthening of the arm. Makes me chuckle this, as I remember shortening a lambretta lever that had an extended basket and two extra plates in order to get more separation between the plates and avoid clutch drag. Jon The bottom of the arm hits the push rod Steve I’ve just gone and looked at an arm and an see exactly what you mean. If the adjuster is backed off could you do it? I could have sworn I’ve done it in the past, but can’t even remember why? Jon |
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Post by midlifecrisisrd on Apr 17, 2020 18:04:30 GMT 1
You would have to take the clutch cover off any way
If you could get the rod moved over enough it should allow it to come out
Taking just the pressure plate off would deffo allow it
Steve
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Post by LC_BOTT on Apr 17, 2020 19:51:25 GMT 1
When you say heavy duty springS, do you mean all 6? Common practice is to have 3 standard and 3 TZ750 from memory? You clutch cover would allow speedy replacement of springs. Jon if I was to take them out how would I know if they was mixed or all heavy duty and would HD springs be needed with the lock up clutch that's fitted? thanks mart When I asked a similar question, replies were that three normal springs could be used on their own with the lock-up. regards the springs, the HD ones I got from Norbo have a large yellow paint blob on them (much bigger than standard) |
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Post by rigga on Apr 17, 2020 20:06:17 GMT 1
I only run 4 springs with my lock up, action is very light, and the lock up arms stop any slip, more tuned the engine then all springs might be needed.
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Post by charlesypvs on Apr 17, 2020 22:17:57 GMT 1
Hi
Last year my clutch started to slip, I changed the friction plates and 10% stronger springs;
Now the clutch is adjusted, I don't have any free play and the lever is hard. I'm thinking going back to the stock springs.
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Post by tipfinchy on Apr 17, 2020 23:01:14 GMT 1
thanks gents , so is there any visual difference HD springs and normal , guess I will have a look over the next week or so as work is a bit slow , so there could be some more daft (to most ) questions  mart |
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Post by hoist1 on Apr 17, 2020 23:06:00 GMT 1
Hi Last year my clutch started to slip, I changed the friction plates and 10% stronger springs; Now the clutch is adjusted, I don't have any free play and the lever is hard. I'm thinking going back to the stock springs. If you have a powervalve you have to take the clutch cover back off and adjust the screw. |
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Post by charlesypvs on Apr 17, 2020 23:10:34 GMT 1
Hi Last year my clutch started to slip, I changed the friction plates and 10% stronger springs; Now the clutch is adjusted, I don't have any free play and the lever is hard. I'm thinking going back to the stock springs. If you have a powervalve you have to take the clutch cover back off and adjust the screw. It is a power valve; Also and planing to do that, its hard to change gear and difficult to get neutral. |
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Post by charlesypvs on Apr 17, 2020 23:16:38 GMT 1
thanks gents , so is there any visual difference HD springs and normal , guess I will have a look over the next week or so as work is a bit slow , so there could be some more daft (to most ) questions mart They are the same size, before I wanted to leave 3 old ones on and just change 3 HD springs, but my mechanic advice to change all of then. I recreated it. |
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Post by hoist1 on Apr 18, 2020 4:02:01 GMT 1
Put new standard springs in. Back off cable adjuster, undo nut and screw in centre of cutch, then turn screw until resistance is felt and back off a quarter before locking nut while holding screw in same position.
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Post by charlesypvs on Apr 18, 2020 10:25:30 GMT 1
I will first check the old springs, if they are under specs.
Thanks.
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Post by muttsnuts on Apr 18, 2020 12:07:51 GMT 1
check the clutch stack height, so measure the thickness of the fibre plates and the steels, if they are wrong then your clutch stack height is wrong, which can cause drag/heavy clutch, especially if the height is a lot more as that leaves less room for the springs to compress up
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Post by 4l04ever on Apr 18, 2020 12:14:02 GMT 1
If you are running a lock up clutch, you can run standard springs and just put heavier bob-weights on if it still slips. This should also make for an easier lever pull.
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Post by 4l04ever on Apr 18, 2020 12:30:15 GMT 1
Standard fibre plates are 3mm. The steels are about 1.2mm. I think the aircooled steels are thicker??
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Post by charlesypvs on Apr 18, 2020 13:09:40 GMT 1
I have just check my old friction plates and the springs, frictions are 3,01 mm and the spring are 35,40 mm, still have to open the engine to check the steel plates, I think wen I bought the bike someone before used normal car oil;
I will get new springs for the bike.
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