Overview Reviews Similar Products –> Product Description Airsal Stock 38mm piston kit for Puch Maxi, Newport, Pinto, Swinger, Murray and all others that had the E50 Engine. Will fit Tomos A55 engines as well. 12mm Wrist Pin Product Videos Custom Field Product Reviews Write a Review Write a Review Airsal Airsal Puch & Tomos A55 38mm Stock Piston Kit Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments * 5 Reviews Hide Reviews Show Reviews 2 Rings Posted by Larry on 20th Oct 2021 The piston rings are very brittle. I had to order a second set of rings to replace the first set. I could not open them up enough to clear the dome of the piston with out breaking them. *Mopeddivision “Installing rings is tricky business, great care must be used when doing so. It helps to watch a couple videos if not completely familair.”