Magnum XK Clutch Slip (?) Question

Andrew B /
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Hey all,

Did a lot of research on this and tried some things out but I'm still having an issue.

Here is my current setup:

78 Magnum XK

E50 2HP

15mm Bing (needle on lowest (richest) clip with a 2.17 atomizer and 78 jet)

MLM intake

Metal mesh "Ken Roff" Filter

MLM People's Pipe (larger header)

E50 Jammer v6.4 with weakest springs (soaked in Royal Purple Max ATF)

Royal Purple Max ATF (stock fill level)

16x40 gears

No air leaks or related issues.

My problem is that - from a stop - when I twist the throttle the RPMs rise quickly but the ped doesn't accelerate at a comparable speed. I think the clutch is slipping too much. If I pedal as I roll on the throttle it "catches" and accelerates better. Without peddling the moped struggles / slowly gets to 10mph or so, RPMs then drop and I'm assuming the clutch engages and accelerates as anticipated all the way through the rest of the range up to about 40mph.

Anyone have any ideas? I'm thinking its ATF related but haven't tried any other fluids yet.

Thanks everyone!

Andrew(edited)

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