I received a replacement motor today and have it running. The motor looks stock, not upgraded as their web site is selling, not ported (I assume if it was ported the port walls would look like they were machined smooth not rough), phillips head screws (not allen head as the 1st one had) that hold the covers on the engine and the edges of the engine gaskets are sprayed the same color as the engine, not as if the engine was disassembled to replace engine bearings. I assume if you were to replace the main bearings you would need to split the engine case open. At this point I'm not pleased with this supplier. Check their web site, JNM Motors. Looks good. Problem is that's all that looks good. Here it is 2 weeks and I'm not happy. Anyhow would you buy from them? I'm out $450.00