Latest Upgrades and updates for the Alcyon II in 2026.

 I got two aliexpress 2.5mm carbon chassis made up with differing flex levels. Right now I have the "stiffer" one installed. Weight if the chassis is 51g. Notice the very large holes under the diffs and the joining of the slots under the motor and the battery. This is to both lighten the chassis and allow more flex since it is rather thick.

Next, new graphite rear knuckle extenders. This is to raise the camber links above the rear tyre, to lower the roll center. In other words I can use the original plastic rear knuckle which holds the wheel bearings much better than the Alcyon II Ultimate's rear alloy knuckle.

 

The hollow 1.5mm pins are weak, so i strengthen them by using a fine pin tack and adding a little 2 part epoxy inside . Push the pin in all the way, then dremel of the excess length. The pins are now very strong and do not collapse anymore.

 New surpass Hobby V3  13.5T motor. it is an old tech motor but its very cheap and lightweight. My old turnigy motor weighed 173g. This new Motor weighs 154g. That is a 19g weight savings.

 

New front belt tensioner that is placed above the 3racing plastic floating servo mount. it is 3D printed. the purpose is to raise the front belt above the battery, while at the same time making sure the belt does not touch the steering arm.

 Front belt is currently from sakura zero, S3M 519. it is a little tight when new but when after a few packs will stretch and be perfect. This belt length is also same as TRF417 so i bought a few low friction front belts.

 Previously I used S3M 177 belts for the rear, but after the belt stretch even my 3d printed tensioner couldnt take up all the slack, so I now use S3M 174, from TRF416X. The tension is a little tight when new but will be perfect after a few runs. No need tensioner at all.

 

 I also added newly designed front and rear shock towers. That has a bit more upper link mounting positions .

I ground the original Alcyon II plastic C hub and remove the "nub" that places the camber link horizontally.  It is now vertically placed over the kingpin. So 3 degree caster C hub but verttical camber links. The ground off C hub is still stiff and strong. 

 

 New 3D printed bumper and new slim body post and notice the upper bumper brace to prevent bumper from bending.

 

So now, the ride height is 6mm front and rear, front less droop than rear, springs are 295g/mm front, rear 240g/mm rear, arb medium both F/R. the roll centers are a little bit higher than what is with the Alcyon II ultimate's suspension knuckles and hubs, but still lower than the stock Alcyon II pieces.Will be testing the car soon. From the last test with the Alcyon II ultimate pieces , the car rolled a lot and was easy to drive with lots of steering. It should be rolling less that before yet still have a lot of steering with this setup.