Been out of riding for a year and looking to get back into it again. What I am looking at are 2 Deluxe models, one single tone blue and the other 2 tone blue(17). OTD for the 18 is 18350. The 17 is 17610 OTD. Both new just leftovers. Previous bike was a 17 and I know how good it was. Not sure about the extra cost of the 18 and the newer engine.