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5 Plate Clutch

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5 Plate Clutch

Postby PSC GP200 » Fri Dec 15, 2017 2:35 pm

Hi,

What is the optimum thickness for a 5 plate clutch pack without the top plate? I also use MB clutch springs but there seems to be none available at present. What springs would you guys recommend for a nice progressive feel, with no slip and not requiring two hands to pull the lever in? It's going in a Rapido 225. Thanks.
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Re: 5 Plate Clutch

Postby Adam_Winstone » Fri Dec 15, 2017 2:58 pm

I normally use the MB springs too but have found that the Readspeed are similar in function and work well in 5-plates, whereas many of the other uprated springs become coil-bound before allowing full travel. The feel is also very similar.

Adam
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Re: 5 Plate Clutch

Postby dickie » Fri Dec 15, 2017 4:23 pm

Adam_Winstone wrote:I normally use the MB springs too but have found that the Readspeed are similar in function and work well in 5-plates, whereas many of the other uprated springs become coil-bound before allowing full travel. The feel is also very similar.

Adam


I can't speak for reedspeed as I've never used them, but i did some tests on most/many of the other springs available; the results are on here somewhere. Adam is right though, people talk about soft and hard springs but that doesn't really tell you what you need to know.
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Re: 5 Plate Clutch

Postby Storkfoot » Fri Dec 15, 2017 5:15 pm

For several years now, on TS1 and GT186, I have used the same set up with no issues beyond worn out plates after many miles. AF machined rear sprocket, Surflex 5 plates and MB springs. If set up correctly (often you may need a thinner steel or two to get correct separation) it is a good set up, certainly for up to 20hp.

I do accept that the MB springs do need replacing every year but they are a service item.
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Re: 5 Plate Clutch

Postby hullygully » Mon Dec 18, 2017 7:22 pm

I've found that if you use the 3.2mm thk dia springs with a 4-plate & sprocket machined out for 5-plates, you get an amount of creaping forward as you cant compress the springs fully, 3.0mm thk dia springs with sprocket machined out, reedspeed red 5-plates & atomic spider works well on my TS1 230 8-)
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Re: 5 Plate Clutch

Postby corrado » Sun Dec 24, 2017 4:03 pm

Standard plates are 3.5mm and standard steels 1.5mm. 4 plates and 3 steels should be 18.5mm total. You should be able to fit 5 thinner 2.6mm plates and 2 std 1.5 steel & 2 thinner 1.2mm steels, giving 18.4mm total, in the same space. Separation should be better by using a thinner top plate and more 1.5 steels over 1.2 steels. If you do mix the steels fit the thicker ones first.
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Re: 5 Plate Clutch

Postby PSC GP200 » Sun Jan 07, 2018 9:34 pm

Thanks for the replies. I've managed to get some MB springs, so I will build a 5 plate following your advise.
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