No, it's not the ignition, though I would go back and seat the caps hard after engine shut down. It's just a new engine and one cylinder is leaking enough that compression is low on that side. It's VERY common with some of the Chinese engines. If people ever took the cylinders off and looked at the wear pattern established after an hour of running they would see just how much power they are losing to non concetric cylinders. All the shiny spoots are where the ring HAS been seating. The spots that show no wear is where the ring hasn't been seting at all, or or poorly.

I've mentioned before how people were losing 25% or more of the power they should have but as usual nobody was paying attention. I didn't say how, but if they got inside their engines and started looking at things with open eyes they would learn a lot. This is why better engines cost more. They are made beter, with a lot more attention to finish tolerances. It's not enough to simply copy a cylinder and toss a standard piston and ring in it.

So what's happeneing here is just a simple lack of understanding. The cylinder that has a better cylinder bore is wearing in the ring faster, so it's making more break in goo. It's probably also the one with the most compression. The other one will eventually come around, but that will take awhile. Jody had a good point about the selling dealer giving advice. What was it, if there was any?

Jody, give me a call as soon as you can.