BGM thin red "race" clutch plates

[phil23fair]

Has anybody else used these plates? I have fitted a six plate clutch in a new build engine. I have got 1.5 mm clearance on the plates, but the clutch won't disengage properly and is dragging with the clutch pulled in. Initially it wouldn't disengage at all so I stripped it down and all the plates and steels were stuck together. The plates and steels were all coated with oil and the plates slid apart easily, but we're difficult to pull apart. Once stripped down and reassembled the plates were free, but when started it started dragging. I am using Rockoil ST90 gear oil. Are these plates prone to sticking?

[wack 63]

Sticking won't be the problem as the corks and steels are both driven by different methods ie the crownwheel for the corks and the spider for the steels. The problem is down to clearance so you need thinner steels, a rebated crownwheel for the bottom plate to sit in, a stepped top plate , springs that don't become coil bound etc etc

[fairspares]

the plates and steels will be sticky once you have got oil on them and they have been put together with pressure from the springs then released thats normal, if you have 1.5mm clearance once the springs have been compressed then you have something else causing the problem , have you checked the spider and pressure plate slide between each other freely without catching , also if your not using a foxhat,mrb or atomic type spider have you checked if the bottom steel needs the tabs turning upwards to meet the legs on the pressure plate and also as said correct lenght springs.

[jason frost]

All of the above and check the pressure plate is not touching the top of the Christmas tree, some time a mm or two comes above the nut.

[coaster]

All of the above and check the pressure plate is not touching the top of the Christmas tree, some time a mm or two comes above the nut.

I have just had a similar problem with a Beedspeed 5 plate and which was down to the tab washer on the centre nut being a bit bigger than normal and wrapping over the top of the nut which in turn prevented the spider from pushing in fully.

Also, you say you had 1.5mm clearance but bare in mind that the spider can tilt a fair bit so it might have been zero on the other side which might mean you've got a lot less that you think. 2 sets of feelers would prove it.

[drunkmunkey6969]

have you checked if the bottom steel needs the tabs turning upwards to meet the legs on the pressure plate.

The BGM 6-pack of red plates come with one plate which has the tabs pre-turned up.

This plate should obviously be at the bottom, have you checked this Phil?

[phil23fair]

Thanks for all your replies. It was all assembled correctly, but their was about 1mm of weld on the inside of the clutch bell that was fouling the end of the Xmas tree when the clutch lever was fully depressed that was causing the bell to bind. Being as the centre bush that the brass plunger pushes onto was also welded on the outside of the bell as well, I ground it down and now everything works fine.