It’s common to see buggies built on the Kyosho Scorpion chassis being referred to as the Circuit 1000 series. I also used to call them that, because it was a very easy way to say or write “Scorpion, Beetle, Tomahawk, Turbo Scorpion, Advance and Assault” in just two words, and “everyone” understood which cars I was referring to, just like with the Tamiya SRB’s and ORV’s. But where does this name come from? What makes a buggy a Circuit 1000? and finally, does the Scorpion belong to the Circuit 1000 series?
I will answer the last question first. No, neither the Scorpion, the Beetle, the Tomahawk, nor the Turbo Scorpion are Circuit 1000 buggies. They belong to what I would call the Scorpion series, named after the first buggy with that chassis. However, the Assault and the Advance are both Circuit 1000 buggies, but also belong to the Scorpion series, as they share the same chassis. There are also two other Circuit 1000 buggies, the Stinger and the Stinger MkII, that are not parts of the Scorpion series, as those are based on a completely different platform/chassis.
In addition to the Circuit 1000 buggies, there are other Kyosho buggies called Circuit 10, Circuit 20, Circuit 20 Extra, Circuit 2000 and some even just called the Circuit Series. Now we are actually getting closer to the answers to my 2 first questions. Where does this name come from, and what makes a buggy a Circuit 1000 (or Circuit 10, or Circ….. etc)?
Lets first make a short list. I’m just listing a few, as I’m not really into engine powered RC, and you may have understood by now that the Circuit name only refers to engine powered buggies. But anyway, I’ll list enough cars to show the system.
Circuit 10 Series:
3024 – Mercedes 450SLC (pre-assembled), 2396 Mercedes 450SLC (kit)
3026 – Wildcat (pre-assembled)
Circuit 1000 Series:
3041 – Stinger
3042 – Stinger MkII
3088 – Advance
3095 – Assault
2282 – Fairlady 240Z
2283 – Baja California
Circuit 20 Series & Circuit 20 Extra Series:
2289 – Rowdy Baja
Circuit 20 Extra:
3045 – Racing Baja
3047 – Rowdy Baja
3048 – Impact Baja
3049 – Mint Las Vegas
So let’s group these into 3 groups:
Group 1: Circuit Series
These were Kyosho’s first “proper” engine powered racing buggies, they are 1/8 scale, and were meant for engines with a volume of 0.19-0.21 cubic inch. These were later renamed “Circuit 20”.
Group 2: Circuit 20, Circuit 20 Extra, Circuit 2000
Like the first Circuit Series, these were also 1/8 scale, and also had engines with a volume of 0.19-0.21 cubic inch. The “Extra” just meant that the model had been upgraded with a differential, so you will find that many of the Circuit 20 buggies were also sold as Circuit 20 Extra, eg. the 2089 – Rowdy Baja Circuit 20 and the 3047 – Rowdy Baja Circuit 20 Extra.
Group 3: Circuit 10, Circuit 1000
These were smaller 1/10 scale engine powered buggies, and built for engines with a volume of 0.09 cubic inch.
Maybe you have figured out the system by now? If not just read on.
Group 1 consists of Kyoshos first proper gas buggies meant for racing, hence the name the “Circuit series”, as in “racing circuits”. They were meant for racing, on circuits. Later engine powered racing buggies were given a number behind the “Circuit” name, based on the size of the engine. The buggies first marked “Circuit Series” were later renamed “Circuit 20”. In group 2 you’ll find the Circuit 20, Circuit 20 Extra and the Circuit 2000, where the “20” and the “2000” denotes that they were made for engines of about 0.20 cubic inch. In group 3 we have the smaller Circuit 10 and Circuit 1000 buggies, where the “10” and the “1000” indicates engines of about 0.10 cubic inch.
So there you have it! “Circuit” means it’s a buggy meant to be raced on circuits, a “Circuit 1000” is an engine powered racing buggy with an engine size of 0.10 cubic inch, which further concludes that the Scorpion, as an electric powered buggy, does not belong in the Circuit 1000 series. Case closed!