Trickbits

19/08/2026

Jose Zayas posted this yesterday. He was running the YZ10R-25 at 'The Track in Gaithersburg, Maryland'.

Running on slicks, the R25 was on rails. The cars pace supprised the drivers of modern 4WD.

https://www.facebook.com/share/r/14jT1x8YVM7/

15/08/2026

Trickbits' latest batch of re-re outdrives arrived from heat treating today.

The Trickbits outdrives are manufactured in the UK from the highest-quality high-carbon steel. Without divulging the exact specification of the steel we use, this material is used by the motor industry to produce crankshafts, camshafts, gearbox internals, etc. So, the very best.

Heat treating is equally important in producing the final product? We have used gas Nitriding to apply a predetermined depth of case hardening. Each outdrive is hand polished to remove the hardening residue.

Our re-re diffs use the same number of teeth as the original 870c and Works 91 pulleys at 35 teeth. This larger pulley is important because it allows us to use the Associated 6576 ground diff plates, which are used in many of their current cars. Trickbits also produces the pulleys to except 5mm wide belts💥

In summary: the Trickbits re-re diff offers access to the highest-quality internals, 5mm drive belts front and rear, and the same drive ratio as the original Yokomo's.

Please get in contact if you require any additional information 🇬🇧

09/08/2026

RC Trickbits has a number of exciting products for the R25 and the 91R.

We have been running these castor blocks and rear hubs for around two years in 3D-printed format, and they are race-proven with many wins.

Now we have produced them in 7075 aluminium. Our YZ-W91R car has largely driven this development. The castor block support on this car is non-existent. We have largely resolved the issues by producing extremely rigid Delrin arms.

7075 Aluminium contains a significant amount of zinc, resulting in exceptional fatigue resistance and high levels of hardness. The downside of using 7075 is normally a dreadful anodising finish. Hats off to our anodising company. They pulled an absolute blinder on the quality of the anodising they've managed to achieve with this material. I am convinced that English anodising companies are right up there with the very best in the world.

We are releasing castor blocks with 0° and 5°. Two mounting points: top-loading and the original mounting position with a ball stud. Therefore, offering flexibility. Trickbits 91 bulkheads are produced with 12° of castor; this provides up to 17° for the 91 car, and 15° on the 95R car. In our experience, this is sufficient for current tyres and tracks. The castor blocks have a brass bushing to allow them to pivot freely. Brass was chosen as the most suitable material to work in conjunction with aluminium. Brass is a naturally self-lubricating material, and this is essential to prevent the castor blocks from incurring excessive wear. The bushings may also be rotated, providing +/- 2.5 mm of hub height adjustment when using Kyosho steering knuckles.

Also released are rear hubs/upright. This is very much a copy of the Yokomo hub in use by us and others. However, we have replicated the ‘enneagon’ shape of the original item. This again has been produced using 7075. This material was not essential. However, if there were any differences in the anodising colour, we wished both parts to be identical. The rear hubs are available in 0° and +1°. The +1 hub is widely used by our drivers to reduce toe from 3° to 2°. This has been one of our go-to setups for high-grip tracks. You also have the option of installing them as +1 ° to increase the toe to 4° on wet or slippery tracks.

These Trickbits components will fit all vintage Yokomos 870 to 97 cars.

🤔It’s the Trickbits attention to detail that sets us apart!🤔

We have also produced the 94/95/97 rear pivot for the later car in a 3° anti-squat. This has a grub screw in the centre of the pivot block to prevent the hinge pin from rotating in the block (i.e., to prevent wear).

We have other exciting items on order for the later car. The first of which should be with us by the first week of September.

Happy days😁

Costs:
Castor blocks £45.00
Top hat brass bushings £10.00 per set of four
Rear hubs £45.00
Anti-squat blocks for the 94,95.97 car £35.00

21/07/2026

Something has been bugging me since I initially researched the possibilities of creating hop-ups for the Works 91.

Given that much of the standard kit is replaced, why are Yokomo enthusiasts encouraged to purchase a Works 91 donor car?

The standard chassis is not brilliant; the bulkheads are fragile, the castor and anti-squat angles are woefully inadequate for racing, and the suspension arms are shocking. The list goes on.

In reality, the only components you are likely to use from the standard kit are listed below.

YZ503GH – Differential case (2) £13.98, YZ-501GSW1 Steel outdrives cup (2) 19.98,B2-501GGA – Gasket (2) £7.99, 5S-500GM3A Maintenance kit for gear diff (2) £13.98,
(Upgrade) YZ2/YZ4 Steel Gear Diff Bevel gear Set (2) £27.98,
YZ-010RW1 Rear UJ Driveshaft £31.99,
YZ-010RF1 Front UJ Driveshaft £31.99,
(Upgrade) YZ-008W1 – Heavy-Duty 5.5mm Rod End Ball Cap £8.99.
If you are desperate to save money, the Works 91 Suspension arms (2) £13.98

Total cost £170.77 ($228.50).

Current discounted cost of the YZ-W91 £375.00 – YZ-W91TS Team spec 412.49 Depending on which car was purchased, racing owners could have up to £241.00 worth of parts unused in the box. (Prices from MB Models)

Many new owners pointed out this folly when the 870C was released. I appreciate that this will not be typical; however, many Yokomo 870C race cars have cost enthusiastic owners well in excess of £1,000. Many posts were written encouraging people to purchase only the parts required and select the required hop-ups from third-party producers.

Just saying...

10/07/2026

Jose Zayas racing the Trickbits YZ-W91R at the 2026 JConcepts ONS final in Florida.

Second race for the YZ-W91R on dir, and he is also up against a strong field.

09/07/2026

I understand that this is nothing special compared to some parts of the world.

God damn, this is ENGLAND, and we are not used to this in the RC Trickbits workshop🥵🥵

06/07/2026

03/07/2026

It's Friday. Therefore, it must be time for another YZ-W91R custom build.

Every build I undertake, I think, "Yep, this is the best." Or, certainly among the best. It has all the trick parts you've seen on our Trickbits custom builds. This car also has our modified drive shafts with cups to enable additional droop. Check out the wiring: not a millimetre to spare.

• Black anodised motor mount and Masami-inspired wheel hubs.
• Modified drive shaft fitment to provide additional engagement with the outdrives with caps.
• Both gear and ball diffs.
• Yokomo shock caps and standoffs.
• Top-loading castor blocks.
• Top-loading rear hubs.
• Kosworks captive hinge pins.
• 3.5mm black turnbuckles.
• Colour-coordinated wing buttons.
• Trickbits Zero bumpers front and rear.
• Custom-painted body and wing.

This is my most recent, and maybe the last for a short period. Please give it a thumbs up if you like it.

24/06/2026

Who ever thought that going testing on the hottest day of the year in the UK was a good idea?

Well, as it happens, it's not such a crazy idea. Fully covered pit area in the shade. Fantastic track layout. Toilets, showers, you name it, this place has everything.

Just need the driver to rock up to start testing the YZ-W91R 💥

Well done, Coventry model car club.

19/06/2026

Many of our posts in recent weeks have been centred on the new race-winning Trickbits YZ-W91R, and why not, it's showing itself to be a class-leading version of the Works 91.

However, Trickbits has built a strong reputation for building the YZ10R and R25 cars. In the UK, this car has pretty much dominated the top year group in the hands of Nick Goodall RC and Ben Stephenson. In the US Jose Zayas has also shown great pace with his YZ10R-25, winning the double at the 2026 Third Annual Vintage Showdown with both of the Trickbits race cars. As a side, this car has the undertray developed by Jose Zayas fitted.

So, time to share a recent custom-built YZ10R-25 we undertook for a UK customer.

It's a special privilege when customers entrust their new car bills to Trickbits. This comes with added pressure, as they rightly expect their car to be absolutely perfect in every aspect.

This car was purchased way back in September 2025; however, the customer did not wish to take delivery of his car until the outdoor season in 2026.

This YZ10R-25 was built with aluminium anodising, which is rare. It has the look of a true vintage ‘works car’, and looks special. The customer supplied the custom paint and electronics. Our job was to create a race-ready car primarily for bumpy Astroturf.

And it’s a bit of a looker😍 Please give it a thumbs up if you agree...