Originally Posted by gus6464

Who sells xpress in the US?

Originally Posted by guido92

is there anyway you can post part numbers for all the upgrade parts you put in the XQ2S? and was it all direct fit or did you have to modify anything? thanks for the help.

Originally Posted by Hannes

A few posts ago I stated that I might upgrade my XQ1S with the new parts, well... I ordered and built the XQ2S already

Wrote down some things I´ve done while building the car and posted it in our Xpress Facebook group but I like to share it here too. Maybe it is useful to someone building the car.

I will go through this according to the order of the manual.

The ball cups sit very tight on the ball studs of the tie rods after assembly. A pair of pliers can be used to press the ball cups around the ball studs. You have to be very careful when doing this. Test again and again whether the ball pin can now be moved more easily. I have done this with all ball cups. With the lower ball cups of the dampers there is still something to consider, but I will go into that later.

When assembling the differential, I used the new green o-rings because they cause much less friction than the normal white ones. The differential comes after filling also like the dampers in the vacuum pump to remove the air.
I marked the nose of the ball bearing holders of the rigid axle and differential in white, so that the position is easier to recognize later.

When assembling the center shaft, make sure that the screws do not stick out on the other side and damage the belt. A thin washer between the screws and the gear prevents this. I exchanged the standard plastic holders of the center shaft for the optionally available aluminum ones. These twist even less, so there is no problem even with strong motors.
When installing the rear wishbones, the instructions recommend a 0.2mm washer between wishbone and bracket. This was too little for me. I shimmed the rear wishbones 0,3mm and the front wishbone 0,1mm.
I also ground off some material on the wheel carriers so that the suspension can move as easily as possible. This was also necessary on the steering levers so that they can be moved without force.
In the unused holes of the rear wheel carriers I turned a grub screw. This prevents damage to the other hole in case of an accident.

If the double-jointed CVDs are installed, a 3mm instead of 4mm wide ball bearing must be installed on the inside.

I did not install any stabilizers for the time being, as the vehicle will mainly be used on asphalt tracks with little grip.

When assembling the shocks, it is important to make sure that the ball socket is not screwed too far onto the piston rod. If this happens, the pivot ball can no longer move because it is clamped by the piston rod.
I also used the new green o-rings for the shocks. This makes the piston rods run even smoother. If you notice during filling that air is always sucked in from below when the piston rod is pushed into the damper, the O-ring must be compressed more with a thin washer. This comes between rod cover and O-ring.
As with the XQ1S, the assembly went without major problems. Everything was easy to build as described and apart from grinding and reaming the suspension parts, no rework was necessary. Better to grind off some of the parts than to have to work directly with washers, at least that's my opinion.

The chassis makes a good impression and I'm looking forward to the first laps after the lockdown is over here.
I hope I can help one or the other when assembling the chassis with the tips. 🙂

Originally Posted by trx-1racer

I've built one that I consider the minimum for a competitive and reliable racer. Here's the minimum upgrades in my opinion.

XP-10326 - Xpress Aluminum Anti-Roll Bar Set For Execute XQ1S XQ2S
XP-10129 - Xpress 12mm Aluminum Wheel Hex 5mm Red 2Pcs - 2 sets
XP-20018 - X-Square Spring Steel Double Joint Driveshaft 41mm for Xray T2 T3 T4 XPRESS FT1S FT1 XQ1 XQ1S XQ2S
XP-10494 - Xpress Aluminum Lowered High Lock Steering Post For Execute touring Series
XP-10671 - Xpress Composite Spool Titanium Outdrive Adaptor 3.5mm 2pcs For Execute Series Touring

Sway bars for tuning and improved handling - Wheel hex for reliability and mostly convenience - DC driveshafts for smoothness and performance - Aluminum steering posts for durability - TI outdrives for smoothness and performance.

I've also added a set of SMJ1006 2.5-2.7 progressive front springs that improved corner speed. Everything else I've added has not had a noticeable effect on performance.

Originally Posted by Xrayray

Are those springs stiffer or softer than the Xpress blue springs (kit)?

Originally Posted by trx-1racer

I don't have a number on the kit springs, but based on how they feel, I'm going to say they are softer. If I had to guess the kit springs are about 2.7... Maybe someone can clarify for us.

Originally Posted by gigaplex

The XQ2S comes with medium silver, which I've measured at between 2.6 and 2.7.

Originally Posted by timberline97

Really?? Xpress makes two other springs. I wonder what rate those are:
XP-10170
XP-10169
XP-10168

Originally Posted by gigaplex

I measured black at 2.4. Don't think I've measured the pink yet but they felt similar to the silver.

Originally Posted by timberline97

Interesting. I have two sets of silver. One that came with the xq2s and the other with the xq10. I ditched them and went with xray and destiny springs. I liked the number markings rather than colors.

Originally Posted by trx-1racer

I like the Yokomo springs with the print on them.

Originally Posted by trx-1racer

Well dang... Got a great deal on an A800MMX, so sold the XQ2S. Will continue to follow though.