8 replies to this topic

[Reginald]

Hi Guys,
A very helpful past owner of my 1982 tl 320 let me know how he set the clutch up. As follows:

• replaced clutch springs with 6 xr 650 valve springs A$35.00,
  
• whacked on a venhill clutch cable and
  
• uses a magura lever rather than standard

It works like a ty now, its great. I believe the plates were replaced with barnetts but still confirming that.

[Reginald]

Yep plates were barnett if anyone is chasing the part no. drop us a PM. And that should read AU $35 as in Australian dollars although there are roughly the same at the moment.

[scottie_b205]

I looked up the XR600/650 valve springs and there are two springs on each valve. Are the correct springs the bigger outer or smaller inner ones. That is what I see in the schematics. I am guessing the larger valves but don't want to pay to find out.

[B40RT]

Rotax clutch springs are available (in the UK anyway)I currently use 4 of the softest & 2 of the medium from the list below. I also have extended the clutch arm (inside clutch casing)and a dog leg clutch lever.
The end result is a 1 finger clutch, which willslip if you drop the clutch in 4th and above, fine 99% of the time.

Ross

(***N) - LOAD at 20.00mm compression

part no 239.620 clutch spring (169-N) 36.7mm
part no 239.625 clutch spring (212-N) 34.1mm
part no 239.741 clutch spring (255-N) 38mm

Edited by B40RT, 22 September 2011 - 08:25 PM.

[scottie_b205]

I have a 240 which I installed a 280 complete top end on. There are only 4 springs in the clutch. They measure 36.6mm so I'm guessing they are the soft springs by your post. I don't know how old they are. I will order two medium springs and see how that goes. I don't remember what the clutch felt like at the lever.I bought and stripped the bike down almost two years ago. Too many projects and a bad experience with a shady powdercoater and i'm getting ready to assemble it.

[B40RT]

scottie_b205, on 23 September 2011 - 06:06 PM, said:

I have a 240 which I installed a 280 complete top end on. There are only 4 springs in the clutch. They measure 36.6mm so I'm guessing they are the soft springs by your post. I don't know how old they are. I will order two medium springs and see how that goes. I don't remember what the clutch felt like at the lever.I bought and stripped the bike down almost two years ago. Too many projects and a bad experience with a shady powdercoater and i'm getting ready to assemble it.

Length of an old spring is probably not that accurate an indication, measure the thickness of a coil and I will see if I can compare it to some of the known springs I have. (I bought a selection)

[scottie_b205]

Spring measurements as follows:

2.46mm thick

7 coils

18mm wide

36.5mm long

[B40RT]

scottie_b205, on 24 September 2011 - 12:39 AM, said:

Spring measurements as follows:

2.46mm thick

7 coils

18mm wide

36.5mm long

2.10 = part no 239.620 16.6 wide

2.34 = part no 239.625 16.80 wide

2.46 = part no 239.741 18mm wide

All 7 coils.

Think 239.741 must be standard, I'm currently running 3 x 620 + 3 x 625.

Edited by B40RT, 24 September 2011 - 04:23 PM.

[scottie_b205]

Thank you for the spring info. I will try your setup. If it slips for me, I can always try two of my stiffer springs.