These pistons kits can be used with all big bore bikes. 350cc models had a standard bore of 83.20mm, 1974 Pursang and Astro had a standard bore of 83.70mm, 1975 and later Astros had a standard bore of 84.20mm and then 1975 and later Pursang and Fronteras had a standard bore of 85mm. Some cylinders can be bored out further than others. Some early El Bandidos and El Montaderos had 85mm standard bores as well.
350cc, 360cc, 370cc PISTON KIT
Please include your cylinder # or model # to help get your order out quicker as some models need modifications to the piston.