Rotax 503 OVERSIZE bore re-ring set. Comes as shown with top gasket set and 2 sets of rings. for your 503. 72.50 mm bore this is 2nd oversize.
This is enough to re ring 1 complete engine.
ALL sales are final, no returns, ask question before buying, not after.
Promptly shipped from the usa.
Free shipping is for usa only, please inquire for international ship rates
We carry kits for all rotax UL engines up to 583.
