Stroke lengths, TP sizes and SCR for various springers...

[Shed tuner]

measured my HW90 port at 3.0mm x 11mm
(it's now 3.2, which is conservative, but gasrams have more preload)

[robs5230]

Has anyone listed the specs for the HW99S? Or have I just missed it?

Does anyone know whether any changes have been made between the early and later (new) 99's?
Thanks Rob

[T 20]

Has anyone listed the specs for the HW99S? Or have I just missed it?

Does anyone know whether any changes have been made between the early and later (new) 99's?
Thanks Rob

You missed it Rob --- it's in the first post.

-----------bore-stroke-cc----TP--------TP volume---scr--------piston weight

HW99s ---26----71---37.7--3x17?------0.120-----314:1------235 - 225 - 225g piston with seal and no
liner. Add 10g if you leave the weight inside
the piston


I'm pretty sure that the transfer port would be nearer to 16mm in length --- My findings are a couple of posts up.





All the best Mick

[TonyL]

As per Mick's findings:-

"Old school" HW50, later variant (but NOT the HW50/99) with the synthetic seal:-

Bore 25mm, Stroke 65mm. Transfer port 3mm X 25mm. Piston weight 200 - 202 grams.

Thanks, Mick.