I am looking at buying a Mk1 DT 125 LC and believe it is 12 BHP.

What is the best way to de-restrict it.

How do i identify that it is only 12 BHP and not a full power model.

Cheers

I would be surprised if a 125lc is still stock at over 30 years old, hell chasing 40 years old. They were never actually restricted as such and should have solid poke stock, (around 14-15hp in good nick) borderline legal for L plates these days. 

If your just after fast why not go for a later DT, the early powervalve bikes are best if you can find one.

I really like the MK1,thanks for the advice.

Merry Xmas,safe riding