Quote Originally Posted by Wald0 View Post
Well, as technically you are right, there are no specific mufflers for 650... except.. As this bike it done by copying Kawasaki 650cc engine we can assume that it uses similar fuel ratios too, sure we cant know if they are how good, but I would think it is pretty close so I would say any slip on that is good for Er6 or ninja 650 would work great on this bike. True there is not any real way to test this except dyno and trust me I would have taken my bike to one if it would be closer than 1500km :) and yes.. while there are no ECU yet or piggyback devices they might be coming. (not sure powercommander unless 650tr or Nk would hit the US markets)

Ps. it looks like PCV cant control 650Nk ignition advances, but as my sensor might be broken I can only confirm this after I get new sensor as my will read only 300ohm and kawasaki manual does refer it to be minimum 372ohm.. and CFMoto service manual don't have these values.
There is a certain logic to what you are saying about the engine being similar fuel mix between the Kawasaki and CFMOTO. However there is much more going on than that. Firstly it's a different engine, made by different people, and doesn't even take the same amount of oil. Secondly there are different electronics and a different amount of restriction in both stock systems. I'm sure you are aware that Kawasaki and CFMOTO will have set their ECU to match their stock cat and muffler restriction. So by using a slip on for a Ninja 650 there is no real way of knowing exactly what you are doing to the bike unless we test it and arrive at actual data.

So for me, as much as I'd love to shave a few kilos off my bike, gain a little power and get a slightly better looking bike there is no way that I'm touching it unless there is:
-A way to test the fuel ratio, torque and power using a dyno with a Ninja 650/ER6 slip-on and know it's OK
-Someone makes that a specific aftermarket slip-on just for the CFMOTO 650s, with actual data for their product

I respect what you are doing with your power commander set-up, but it's not what I'm in to personally.