The RX4

I first rode the first prototype RX4 in June 2015, which is really quite a ways back if you think about it.  I was in Chongqing to discuss things we were doing on the RX3 and the new RC3 model, a sports bike based on the RX3 engine.  The RC3 bike was stunning, but it suffered from a bad case of “me, too” (Honda, Kawasaki, and Yamaha all had credible 300cc sports bikes here in the US) and the RC3 just didn’t sell well when it reached our shores.  The RX3 was going great guns, though, and there was a cry for a similar bike with more beans.

Enter the RX4.

That first one was wild.  I remember standing out in the heat and humidity with the Zongshen folks snapping photos of the RC3 when a Zongshen engineer rode into our midst on what appeared to be a hacked-up RX3, smartly executing a stoppee that lofted the rear wheel 3 feet in the air, and coming to rest right in front of us.  This guy can ride, I thought.  In my younger days I had done stoppees like that, but not by design and they didn’t end the same way.

The bike was rough. It was an RX3, but somehow the Zongsters had shoehorned a prototype 450cc motor into the frame.  The engine was made of castings and machinings, and it looked (and sounded) very rough.  Telling me that they hadn’t worked out the mapping, my hosts asked if I wanted to ride the prototype.   Is a bear Catholic?  Does the Pope poop in the woods?  Hell, yeah, I wanted to ride it.   I couldn’t talk about the bike in the CSC blog at the time, and that was probably a good thing.  It didn’t run well, and the handling was, well, let me put it this way:  Imagine you’re drunk as a skunk and you’re wearing stiletto heels, and you’ve got to walk across a rocky stream bed through swiftly-flowing water.  In my checkered past, I’ve done two of those three things, and I don’t need to try the stiletto heels thing to imagine what the combination would be like because I rode that first prototype RX4.  It was that bad, and I told the Zong folks what I thought.  They smiled politely.  They knew.

Passport in pocket, standing in the rain with an RX4 in Chongqing about a year or so ago. The GS decals had to go, I told Zongshen…others can advertise their “Go Slow” ADV bikes with big GS decals. Thankfully, they’re gone.

A year or two later I was in Chongqing again, and I rode an RX4 that was closer to what the production bike would be.  It was a much more refined machine.  Heavier than an RX3, most definitely.   Faster?   I really couldn’t tell.  It was raining and I was on the Zongshen test track, which is a tightly wound affair with topes and no straights tucked away on the Chongqing manufacturing campus.   It felt a lot better than that first prototype, but I really couldn’t let ‘er rip because there wasn’t enough room.  I also saw a clay mockup of the RX3S (the 380cc twin) in the Zongshen R&D center, a bike I just couldn’t understand. Again, no photos allowed, but it made no matter to me because the RX3S was a solution to a marketing problem that didn’t exist.

Singing in the rain on Zongshen’s tight test track.

That brings us to today and the production configuration RX4 I am picking up later this afternoon.  Or maybe tomorrow.  It depends on when Joey has it ready.  It’s going to be interesting.  I’m flattered that CSC wants my take on the bike, and that they want me to write about it with no preconditions on what I can and cannot say.

Like I always say, folks:  Stay tuned.

13 thoughts on “The RX4”

  1. Well…do tell! …I guess I will wait by my email box for more news! You do have a grasp of the American market…a 380cc twin? Good 450cc bike makes a lot of sense1

  2. Joe,

    I was eagerly anticipating when the RX4 would get the Joe treatment (either you or Gresh…). After your consultation on the City Slicker I thought it was a fait accompli that you’d be involved with the latest Cyclone.

    Can you elaborate a bit more on the RX3S? I thought it ticked the boxes for a specification for an ‘RX3+’ which seemed to be what some US riders were asking for – increased road performance from an otherwise similar chassis. I have to say I was somewhat surprised that CSC shipped both the RX3S and RX4 over for evaluation as I couldn’t see enough difference between the models from the paper alone.

    Cheers

    Sully

    1. One of these days I will, Sully. Too many irons in the fire right now, but we’ll throw it in the mix.

  3. When you get it, try to make a direct comparison to your RX3’s braking (yours has the big brake kit, if memory serves me right). In my view, that is really the stock RX3 ‘s only shortcoming. The front brake just is not very good. It stands out every time I hop on one of my other bikes (TT250, Versys 650 & GoldWing) and then get back on the RX3. They all haul it done with much less effort and distance.

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