Honda ADV 150 Custom Rear Shock Spring

Hello all

I have a Honda ADV 150 with a stock Showa rear twin shocks with piggyback reservoirs and triple-rate springs with advertised travel of 11.94cm.

The rear shock is really stiff, the actual max travel I get is around 1.50cm with me riding the bike solo (I weight around 75kg).

I started wondering why they put such a stiff spring on this bike (I suppose that's the culprit), limiting the travel like that making it impossible to absorb properly even minor road imperfections.

My idea is to custom order 2 soft springs and swap the springs in the Showa shock (the shock is serviceable like that), with that some concerns come to mind:

- This would increase the movement of the swing arm on the bike, would that be ok or I would be hitting something on the frame or other part? What I should verify first?

- How I would go about determining the spring rate in a way that I have a plush mounted rear shock?

- Is this idea valid or I'm missing something here?

- What are your general ideas on this?

Thanks!

 

Can anyone help?