Can't say enough about how Impressed I am with this 2100 China replica. Well made! Well put together, well packaged, and shipping said 2 weeks.,got it in 2 days! No instructions but that would be because this carb has many applications. You tube is filled with tips tricks and tuning info for most makes and models. Fired up with minimal adjustments in my case. (AMC 360) . I'd have no issue recommending it.