I can't really comment on the 86's suspension, but my 88 has a stock suspension & it actually dunes quite nicely. I would say that if I were to upgrade anything on it, I would go with +2 arms up front with some Elka shocks all around. I don't see a need for the +1 forward arms except that some guys need then for pipe clearance. As far as your swing arm length goes, that really depends more on your riding style the most. If you are gonna run an aggressive paddle tire & plan on some hard drag race launches, then the +4 swinger might be for you. For general play duneing, a stock to +2 swinger will be your best bet. Horsepower, total weight, paddle style & count, and type of sand all play a role in determining your swing arm length.

Contact Yuhuza32 on here with the Honda East Toledo store for a good deal on Elka shocks.

For A-arms, contact Metaltech or Proformance Prototypes. There are other companies but production time can be slow.

For swing arms, you have a couple more choices. Metaltech, Proformance Prototypes, SLC Customs, Fireball Racing, and Lonestar are just a few.