To guarantee problem free installation of your manifold spacer, we recommend using a subframe. The subframe enables you to mount the carburetor directly above the rear tire. The original motor mounting does not have to be rewelded, all that‘s necessary is to replace it with the new part, This means there is no diffi culty is you want to reverse the modification. Another gimmick; the wheel base is extended ca. 10 cm, which makes it highly suitable for sprint racing. Fits all horizontal/vertical MINARELLI motors.