Yokomo MR4TC-Special Review


We were really impressed with the level of ‘hop-ups’ for this kit. Included in the kit were aluminum dog bones, hex nuts, threaded shock bodies,  2 front and 1 rear sway bars, Front and Center one-ways, aluminum battery hold down, complete ball bearings, Lundsford turn buckles and all the tools to put everything together, including a nice Lundsford wrench.




Putting the Yokomo Special together was a snap. It took me about 4 hours to put the complete car together, including electronics, taking my time. The chassis didn’t need any modifications or hours with a Dremel tool. It was ready to go out of the box.

I was surprised at how nicely the rear diff went together and how smooth it was. The kit also provided the parts (less diff balls) to make a front diff if you didn’t want to run the front one-way.


The shocks went together very easy, and with the added bleed screw they were easy to make “air free”. We started with the included Yokomo Yellow springs and the kit shock oil.




I put the car down on the track (Speedworld Raceway) and was very impressed on how the car handled. After talking with factory driver Jason Moberly, we decided to try a couple of changes. First we took off the “upper” front sway bar and put on the “lower” front sway bar. Next we swapped out the rear arms with the older MR4TC arms, which shortened the wheelbase and gave us more steering. Then we went to a softer spring setup to gain some more traction all around. We also played with the front and rear camber links to fine-tune the car to my liking.

The car now had excellent corner speed from entrance to exit and pivoted quite nicely on tight slow speed corners. Perfect!

We also ended up eventually putting in a 64pitch spur gear. I personally like the DM spur gears (same brand as the kit gear) and a 108 fit in quite nicely to replace the 81 tooth 48pitch gear that game in the kit.





Even though this is a great car, it did have a few cons. My number one complaint was with the turnbuckles and how sloppy they were on the ball ends. This really didn’t affect the car’s performance on the track, but I hate a ‘sloppy’ turn buckle. But sloppy is better than ‘too tight’. The only other thing to watch are the aluminum out drives. In stock these will last quite a while, but if you’re running modified, you’ll want to pick up some hardened dog bones.




This car offers the best bang for the buck on the market. With the exception of the normal assortment of springs and sway bars, you really don’t have to buy anything ‘extra’ for this kit. The car is very tunable, and handles great right out of the box. Parts are very easy to come by, and the car is very durable. We’ve only broken one rear arm in testing (after a really hard hit) and parts are cheap.

It was a real dream putting a car together where 95% of the hardware used the same size Alen wrench. Nice job Yokomo.




The Yokomo Special assembled very well, is easy to maintain and work on, and is a solid performer on the track. The car comes with every hop-up you could want for no extra cost. So not only is it a performance leader, and also a price and value leader.


For more information and discussion, check out the Yokomo Drivers Thread on our message board.


Setup Sheets:


Jason Moberly's Yokomo 
Alex Siemantel's Yokomo

Chassis in progress

Kit Parts!

Left Front

Left Rear

Right Front

Right Rear

Yokomo frt

Yokomo Side

Yokomo Special

Yokomo Top
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