Yeah Racing D4 Conversion Kit – First Impression (Part 1)

What’s up guys! So for today, I am going to go over the newly released Yeah Racing Sakura D4 conversion kit with all the fancy alloy bits and pieces.
Since the kit brings a ton of parts, this is only going to be part 1 of the article where I will cover the parts, their quality, and the installation.
Later in part 2, I will try to go over adjusting it all and getting it in the “feel right” zone.

Now, since my D4 was built 90% from upgrade parts without buying the original kit, I actually had to downgrade my chassis to give you the best/unbiased review possible. I hope you guys the read below.

Now I’m not sure if you remember, or have seen it at all, but while Yeah Racing was in development of the kit, they made a quick video showcasing all the parts in their bare aluminum look. And, in this video, they had this quick screen saying, “Quality is main concern”.
Well let me tell you something, for having used Yeah Racing parts in the past, this is by far one of the highest quality product I have seen from the brand. And by quality I mean great machining, beefy construction, good looking anodizing, and clever design. Let’s take a look at what the kit brings you.

Jesus! That’s a lot of stuff. Especially considering the whole kit sells for just under $125 on RCMart.com. This is quite the bargain.

Every upgrade brings its own piece of paperwork, and also included is a sheet of neat little decals.
The whole kit includes the following:
-(x1) set of front lower arms
-(x1) set of rear lower arms
-(x1) set of front upper arms
-(x1) set of front uprights (knuckles)
-(x1) front axles + bearings
-(x1) set of rear uprights
-(x1) set of front and rear shock towers
-(x1) set of rear CVDs
-(x1) spur gear holder
-(x1) spur gear cover
-(x1) bumper cover plate
Now let’s look at the quality and assembly of the whole kit, shall we?
I will start with the rear and work my way to the front of the chassis.

Rear Arms & Rear Uprights:

I was super excited when I first saw the kit because I knew it would have adjustable wheelbase. Checkout the adjustment system.
The arm is made of two parts and locks in place thanks to the small rib pattern inside. The arm can extend a full 10mm to fit these extra wide bodies!
Damper positions are similar to the upgraded arms from 3Racing, but stick out further back so the damper angle won’t be as awkward looking.

As you can see, I wasn’t kidding when I said the Yeah Racing design was beefy. The 3Racing arm look so small compared to the YR one 😛

Yeah racing on the right, and 3R on the left. Let’s just say, you won’t be breaking these anytime soon! An interesting thing to notice is that Yeah Racing used the plastic bushing on the upright and not on the arm itself like 3R did. To me, this is big deal because when handling the chassis, these bushing tends to fall out of the arms and roll under some furniture, then you find yourself looking for them for the next 20 minutes.

Having these on the uprights made more sense. Thanks YR for thinking about this! It is a little detail some people won’t notice but will be thankful for later.
Another thing I noticed is the anodizing on the Yeah Racing parts is clean and uniform compared to its competition, which shows that once again, Yeah Racing held their promise of a quality product.

Spur Gear Holder & Cover:

Checkout this minimalist design! The spur holder and cover are definitely a cool add-on to lighten the drivetrain. Compared to the factory holder, this one is about 35/40% smaller which is nice. However I found myself in a pickle when testing it on the Usukani rear gearbox system. Since they use a proprietary shaft system and the Yeah Racing still uses the pin system from the factory chassis, I had to stick to the Usukani one.
I think eventually I may drill the Yeah Racing spur holder to receive a set screw and work with the gearbox.

Shock Towers:

I’ve always preferred aluminum shock towers to CF or CFRP. They just look way cooler and always add a major bling to the chassis. But don’t be fooled by that, these shock towers actually add indispensable shock mount locations. The holes are through (not tapped) to ensure a strong link between the pillow ball and the towers. It gives the chassis this very futuristic Wipeout 2097 look and I dig it! lol.

Front Lower Arms:

Very similar to the rear arms with the same adjustable wheelbase and rib design. This time the bushing is on the arm because of the hub-less design of course.
Since at the time of the build I did not have original plastic parts, I use some ball end I had laying around, but for part 2 of this article, I will have the 3R parts which actually look a lot better with this kit. After all, this kit was design to be a direct fit, no hassle involved.

Upper Arms:

I apologize for the slightly blurry pictures, but these things are so tiny and detailed that my camera struggled to get crisp shots.
Ok so these little guys are pretty gnarly, they allow for tons of caster angle, and I mean TONS! like “how does this even run?” tons!
In the factory setting from the instruction I must have been passed 15 degrees already so there will be some serious tuning later on in part 2 to get these right.
I did spend a bit of time using my ball reamer to remove as much friction as possible to ensure free movement. Otherwise these little guys are pretty killer! all the spacers and screws are included as well.

Front Uprights:

Here is the part I was anticipating the most. The almighty uprights!
the reason I was so anxious to try these is because I had seen the similar design from MST a while back, and Yeah Racing emulated it with their own touch and it looked awesome (and pink).
By comparing this upright with its counterpart, I’m pretty sure this is the most adjustable one out there by one hole lol.
And of course it is beefy just like the rest of the kit which means you are less likely to strip the threads.
Since my kit was a press kit, I did not receive the bearings and axles, but when talking with Yeah Racing, they confirmed these were omitted at the time of shipment.

So far the kit exceeded my expectations and the adjustment possibility is quite outstanding. The only thing I could say to be VERY critical was the front upper arms were a bit of a pain to get to move freely, but that’s also due to the fact that I lacked some factory part so my experience may be a bit biased on that. Aside of this tiny hiccup, It’s by far one of the most complete kit out there to do a mass upgrade to the D4. Another cool thing is that the kit does come in pink and black for those Auper-D owners out there so you guys are not left out.

This concludes part 1 of my review. In part 2 I will try to go over the best setup I can achieve with the kit.
Thanks for reading.

 

1 thought on “Yeah Racing D4 Conversion Kit – First Impression (Part 1)

  1. NICE…

    I HAVE A Question
    HOW Long IS THE TURNBULCKLE THAT YOU USE IN THAT Conversion kit

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