Kyosho Inferno MP9 TKI4 ReadySet 1/8 Nitro Buggy w/2.4GHz Radio & KE21SP Engine

Low Price: $499.99
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The Kyosho Inferno MP9 TKI4 ReadySet 1/8 Nitro Buggy includes the DNA of the competition-level MP9 TKI4 kit model and its advanced racing technology is embodied in this Readyset. The MP9 TKI4’s long front suspension arms and 17.5° caster front hub carriers create superior cornering and sharp control. The cab forward body increases downforce, giving the TKI4 an aerodynamic performance advantage and delivers balanced cornering and optimal traction. Inclusion of the user-friendly and high torque KE21SP engine fitted with recoil starter and tuned exhaust, anyone wishing to challenge the peak of 1/8 engine buggy performance can find the perfect racing partner in this MP9 TKI4.


  • Readyset contains a pre-assembled chassis and body, including everything except batteries for the transmitter/receiver and engine starting tools. Can be ready for action the same day you buy it.
  • Both steering and throttle are equipped with high-torque metal geared KS5031-09MW servos.
  • Precision setting adjustment of wheelbase, tread, toe angle, camber angle, caster angle and roll center etc.
  • Features a large capacity air cleaner that extends the maintenance cycle.
  • Wide variety of available option parts provides extensive range for tuning on track performance.

Length: 490mm
Width: 307mm
Height: 180mm
Ground Clearance: 28mm
Wheelbase: 325mm (4 settings available by changing rear hub collar position)
Tread (F/R): 254mm (2 front settings and 3 rear settings available)
Tire (F/R): 116 x 44mm
Gear Ratio: 11.7:1
3,370g approx.
Engine: KE21SP (recoil starter installed/rear exhaust)


  • Factory assembled chassis installed with R/C system
  • Printed pre-cut body complete with decals
  • Pre-installed KE21SP engine with rear exhaust
  • Syncro KT-331P transmitter
  • 1.5, 2.0, 2.5mm Hex wrenches
  • Cross wrench (small)
  • 17mm Wheel wrench

Needed to Complete:

  • AA x 8 alkaline batteries for transmitter and receiver
  • Fuel
  • Starting tools (Fuel bottle, Plug heater)

This product was added to our catalog on October 18, 2018

Saturday, Jan 5 2019 (about a year ago)
Kyosho Inferno MP9 TKI4 ReadySet 1/8 Nitro Buggy
I am ordering more parts for this car from Amain right now and thought I would share my experience thus far. Could not physically turn over the engine for first start and knew it was not due to being tight. Took the engine out, clutch apart and found the flywheel mounting cone and washer were not there so the flywheel was smashed against the front of the crankcase. Decided to go thru the whole car and found that not only is there no oil in the diff's, but they smeared so much white silicone sealant on the gaskets that it has covered the gears with the stuff. The antenna was destroyed right out of the box and is a special size specific to Kyosho. The wheel bearings are loose and need to be shimmed. There was a small dent on top of the pipe, but upon removing the engine I found that there are actually five dents in it. The body cannot be removed with ANY ease without significant cutting around the front shock tower and cooling head. Most of the screws checked or removed so far were loose with no lock-tite. After having this for a week I have a pile of parts and three orders to Amain for parts. NOT real impressed!
Verified Owner
Sunday, Nov 4 2018 (about a year ago)
Kyosho Inferno MP9 TKI4 ReadySet 1/8 Nitro Buggy
Glow plug was bad and had to replace it for first start but other than that it's a very well built buggy. Engine broke in without and issues. Has great power and very exciting to operate. The handling is superior and very predictable. Great buy would highly recommend.
Verified Owner
Tuesday, May 12 2020 (2 weeks ago)
Kyosho Inferno MP9 TKI4 ReadySet 1/8 Nitro Buggy
I bought this 1 and it is great ?love HobbyTown. when we’ll all cars come back in?
Verified Owner
Friday, May 1 2020 (4 weeks ago)
Kyosho Inferno MP9 TKI4 ReadySet 1/8 Nitro Buggy
Great car once I upgraded the diffs to 4 gear...they come 2 gear...motor so far running very good... good power for the indoor track I run on
Verified Owner
Sunday, Mar 15 2020 (2 months ago)
Kyosho Inferno MP9 TKI4 ReadySet 1/8 Nitro Buggy
Well let me start off buy sayin I just started my rc venture and got this buggy it's not really race worthy but u could but I loved it so much I dropped another 7 to 800 bucks into mine I wanna race done orion crf 7 port psm standoffs psm carbon shock towers hub shims reds tetra cluch reds 16 tooth clutchbell ths torqe tuned pipe as far as diffs and shocks copied spec a cant compare to other cars but this thing is crazy I would buy again
Verified Owner
Monday, Dec 9 2019 (6 months ago)
Kyosho Inferno MP9 TKI4 ReadySet 1/8 Nitro Buggy
This is the best Buggy to start racing nitro. I have mine over a year now, before that I had the TKI3 RS also over a year. It helped me learn a lot upgrading it to a race buggy. I have upgraded it with kit parts and it can keep up against any of the latest racing kits. The most importat if you want to race with this buggy is to upgrade the drive train, swing shafts and differentials (internals and cups). You should also get rid of the pull start, put the kit’s shock towers and race tires. With time also a racing engine, pipe, manifold and a stronger steering servo.
Verified Owner
Tuesday, Mar 5 2019 (about a year ago)
Kyosho Inferno MP9 TKI4 ReadySet 1/8 Nitro Buggy
It’s awesome ready set kyosho, the only thing it’s hard is breaking in the Engine of course it’s boring but after u break it in the engine and tune properly this ready buggy it will fly like a rocket, the only thing I didn’t see in the manual is how to break in the engine I have to research from YouTube how too, other than that everything it’s awesome to me,