clutch slip

[handofdave]

need help got a 5 plate clutch new corks and additional centre spring but slipping like mad when i hit the power band is there any alterations i can do to stop this without buying a different clutch,which are the strongest springs and corks to use, thanks

[Adam_Winstone]

Make sure that this is not the front sprocket cush drive spinning over the ramp, which gives the feeling of extreme clutch slip under load. If you search for this subject on here and/or LCGB site then you should find all you need to know.

Good luck.

Adam

[coaster]

need help got a 5 plate clutch new corks and additional centre spring but slipping like mad when i hit the power band is there any alterations i can do to stop this without buying a different clutch,which are the strongest springs and corks to use, thanks

Did you check the clearance between the plates ((fully compressed) when building it? you need to have somewhere between 1.5mm and 2mm, less and it will drag and much more and you will get slip. Use a set of MB springs and you unless you are running a VERY powerfull tune you won't need the center spring. Adjust the gap by using thicker/thinner top plate/steels/friction discs as required. Building a clutch takes time, unless it's a bog standard scoot, you need to budget an hour or 2 to get it right. The last one I did took more than 10 attempts to get the clearance right.

[handofdave]

thanks for the replies i have got minimal seperation on the plates and lots of drag i can live with the drag i just take it out of gear before i stop but i had to set it up like that as previously when i adjusted the free play out of the lever every time i hit the power it ate the brass actuator in the chaincase,tried it without the centre spring when i first assembled the clutch but it slipped like mad,centre spring worked for about 200 miles now back to square one

[Adam_Winstone]

Centre springs work well on 4-plate clutches but they limit depth travel and separation when fitted to a 5-plate. As the key to 5-plate use is to allow the pressure plate to compress deeper into the crownwheel, anything that limits travel is a very bad idea, normally leading to drag... then getting hot and slipping!

IMO you should use the centre spring and chuck a 4-plate back in or bin the centre spring and stick with the 5-plate... either/or but not both.

Adam

[handofdave]

4 plate with centre spring slips like mad when i hit the power band,5 plate without centre spring is exactly the same,cush drive is ok,might try and slip an extra plate in the basket try and stiffen them springs up,never had slip problems years ago wondering what they have changed in the corks to cause this or could thinner gearbox oil help?

[Adam_Winstone]

I don't like some of the modern corks and find that they slip, yet others seem to swear by them. If you're thinking about adding plates to try to resolve spring issues then I'd suggest getting some different springs, as preload is more about spring length in the space between pressure plate and spider, rather than plates.

The oil probably isn't the issue. It is more likely to be the combination of parts that don't function well as an assembly

Best of luck with it.

Adam

[coaster]

.... i have got minimal seperation on the plates

ery well
Did you measure it with feeler gauges though? I was advised the 1.5mm is optimal and have found that MB springs work very well having a good blend of stiffness and length.