Derbi Variant pyramid reed bearing and seal sizes

Does anyone know the specific seal sizes for a Pyramid reed variant engine? Dos sells a party pack of all of them but they are currently sold out, but they have all of the sizes listed. The bearing sizes all make sense but the amount of seals listed is what is confusing me. It seems like there is multiple sets of crank seals listed and I couldn't tell if one set was for the PP and one was for the PR but they just included both? I know the crank seals on the PR I have are 17 x 28 x 6 as I have replaced them before.

Here is what they have listed:

15 x 30 x 7 - x1

25 x 40 x 7 - x1

16 x 24 x 4 - x2

16 x 28 x 7 - x2

17 x 28 x 6 - x2

12 x 18 x 3 - x1

Just seems like a lot of seals to me but I have never rebuilt a derbi so I don't really know. individually buying all of them is starting to add up and I just want to make sure Im not ordering something I don't need

Re: Derbi Variant pyramid reed bearing and seal sizes

Here you go:

15 x 30 x 7 - x1 - Output shaft, sprocket side

25 x 40 x 7 - x1 - output shaft, rear pulley side

16 x 24 x 4 - x2 - pedal shaft

16 x 28 x 7 - x2 - crankshaft seals option 1

17 x 28 x 6 - x2 - Crankshaft seals option 2

12 x 18 x 3 - x1- pedal engagement seal

So you don't need the 16x28x7. You also probably don't need the 12x18x3 as it sits on top of the case so it's not really doing much.

Also, check if your rear sprocket is held on with a circlip or nut and lock washer. If its a clip you're good but if it's a nut you'll need a 20x30x7 as there is an additional spacer that sits behind the sprocket.Edited 1 time(s). Last edit at 01/15/19 12:04AM by spudley.

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