Notable Features : The Pursang presented here was modified for AMA Class-C type TT racing or fast scrambles held on smooth tracks, Front 19 " wheel with brake is from an early Model 90 Bultaco Astro, Tires are a Pirelli MT-53 & Carlisle Universal combo typically used during the 1970's, Arnaco rear shocks with aluminum bodies replaced the longer-travel OEM Betor units, To turn the motor into a small-bore screamer its cylinder was ported, a larger 32 mm Amal concentric with stub manifold was adapted, and a new Mahle piston was installed.