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Tekno RC EB410 Thread

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Old 05-13-2019, 06:33 AM   -   Wikipost
R/C Tech ForumsThread Wiki: Tekno RC EB410 Thread
Please read: This is a community-maintained wiki post containing the most important information from this thread. You may edit the Wiki once you have been a member for 90 days and have made 90 posts.
 
Last edit by: tobamiester
Welcome to the EB410 Wiki page.

Basic Stats/Features:
  • Shaft drive (tapered AL for light weight and straightness)
  • Gear differentials (all 3)
  • Low Angle CVAs (with captured pins so no ejecting them!)
  • Durable stub axles with 12mm hexes and optional offset adjustments
  • Reverse bellcrank steering system
  • Quick access bulkheads (for easy diff maintenance and tuning)
  • Spllt center diff holder (for easy diff maintenance and tuning)
  • 8th scale style motor mount (for easy mesh adjustment)
  • 13mm big bore shocks
  • 3.5mm shock shafts
  • Droop screws

Videos
Servo Horns
Tekno included a plastic servo horn but also offers an aluminum one. This is highly recommended. Here's a list of servo horns that have been found to work:
Gearing:
Works out of the box for mod or 13.5.
  • Preference for Associated factory team pinions
  • Start mod gearing around 21t pinion
  • Start 13.5 gearing around 29t pinion with the stock spur (81tooth). If using a Tekin Spec R 13.5, start with a 24t pinion for medium sized indoor tracks.
  • Internal Gear Ratio: 2.5:1
  • For comparison:
  • B64 is 2.47:1
  • 22-4 is 2.4:1
  • YZ4 is 2.6:1

Wheels
  • B6/22/rb6 wheels direct fit
  • 22-4/XB4 front wheels direct fit
  • B64 front wheels will fit, but you need the +1 hexes (can use #TKR1654X, which is a +1mm hex)
  • 22 2wd front wheels will also fit, possibly a good option for carpet.

Setup Sheets and other documentation
Setup sheets for all Tekno RC vehicles can be found here. Please be sure to try our recommended setup. It works very well on most tracks.
Piston Drills:
Some of our setups recommend using pistons that are enlarged. For instance 4x1.9 or 3x2.0. To drill the pistons we recommend the following:
Aftermarket Upgrades:
Warranty Policy:
Tekno RC is the only company in the industry that will give 50% off of parts if returned to them using the General Warranty return policy found on their website. The parts can be lightly used or completely abused, as long as the part is still being produced it's covered!


Build Tips:
  • When fastening the steering posts with a 5.5mm socket wrench, you can back space the socket with some nuts to help drive the post into the bulk head

  • Place an alcohol swab over metal threads and drive screws through the swab to clean both sides of threads before applying thread lock

  • Use a metallic marker to indicate what fluids you have filled in your diffs for easy identification

  • Apply thin layer of grease on crown gears to help hold gaskets in place for easy hole alignment

  • Bags F and H have 2 different size set screws, be sure to use the smaller 3x3mm screws for the hexes or you may run into problems installing wheels over the hex if you use the longer 3x4mm screws
  • To make is easier to slip the o-rings on the shock cap bleeder screws, apply a drop of shock oil and slip them over a 1.5mm hex bit, then line up the bit with the screw and transfer the o-ring over using fingernails or needle nose pliers
  • pinch+rotate shock caps in 17mm hex wrench to improve roundness
    More shock build tips here
  • Use a 3.05mm drill bit or 3.05mm Kyosho arm reamer, 1/8" drill bits are not recommended because they are 3.17mm in diameter and tend to introduce too much slop, the pins are roughly 2.97mm in diameter
  • Replace the stock 3x14mm screws (TKR1405) with 3x20mm screws (TKR1409) in step H-10 in the manual in order to increase durability to the bulkhead.

  • When installing the front and rear differentials into the bulkheads be careful when tightening the 3x8mm screws of the cover that holds the diff in place. Bottom out the screws first (use a hand driver and make it hand tight) then check the diff to make sure it rotates smooth. If it binds up, start by backing out each screw 1/8-1/4 of a turn until the both front and rear diffs move freely. The plastic threads will keep the screws in place so don't worry if you think the screws are not secure.
  • When installing the steering hub kingpins (TKR6596), drive each one in hand tight only. Then check the movement of the steering hub. If it binds up, back out the kingpin screws by 1/8-1/4 of a turn until it moves freely. Then install the set screws (TKR1601) to hold it in place. Only drive the set screw in until you make contact with the kingpin. Do not force it.
  • If using the low profile servo mount, be sure to use smaller OD (outter diameter) washers to avoid rubbing on the center drive shaft. Protek ball stud washers are a good example of the acceptable diameter. You can chose to not run washers though it is recommended to use them as it makes for a more secure mount.

  • Ball Cup Alternative from AE: ASC91453. These are used as a harder composite option if you are not happy with the softer stock plastics. Note that these are approximately 2-3mm shorter and require compensation when building your kit to the manual specs to achieve proper camber/toe settings


  • Wheel Nut Alternative: Yokomo 4mm Thin Aluminum Serrated Flanged Nut

    https://www.amainhobbies.com/yokomo-...-n4flt/p541494


  • Moving Rear Shocks to the Front of the A-arm

    This is the break down of what's required by one of the Eb410 FB users.

    Joey A.

    So since there has been some people wondering about running the shocks in the front of the arm I though I would try explaining everything that I did to get them to work and why. My goal was to run as much stock stuff as possible with the least amount of modifications.

    -Arms- need to be flipped and 1mm shaved off the back (spacing the arm farther back) running it this way the car is still a mm shorter then stock but more material could be removed for more adjustability but I have found no need to make the car longer.

    -Inner ball stud- there are 2 ways of mounting, the first can be used with the stock plastic tower. All you need to do is use a 10mm ball stud instead of the lower shock mount screw and a little clearance from the shock tower and diff case. Using this method will work but the ball stud is moved lower and farther in then the stock locations which requires different pivot locations to try and correct roll centers. The other way (preferred) using the option carbon tower drill a hole higher and farther out if done properly you will be able to get the ball stud location in the correct hight(0mm) and between the two stock locations.

    -Shocks- only 2 changes from stock you will need to space the top shock mount 2mm out. You will also need to run around 1.5-2mm less droop depending on your setup.

    -Sway bar- this is the hardest part of the swap. This can be done a million ways I chose to print a mount in the stock ball stud location which allowed me to use the stock swaybars and arm mounting position. You can also bend your own bar and use the stock mounts on the back. You will have to drill your arms on the other side and closer to the pivot for this to work (remember you will need a thinner bar the closer you mount the lower pickup on the arm to get the same feeling as stock).

    -Other- you will need to remove the drop screws on the rear arm. Depending on rear rims,hubs,ballcups and setup you might need to clearance the outer ball cup so it doesn’t rub on the wheel.

    -Why- the benefits of running the shocks in the front are the ability to run a softer rear shock package without giving up corner speed and pack. The car will land without chassis slapping or packing out as easy allowing you to drive the car harder and it corners flatter and rotates faster without losing rear grip.

    Sorry for the shity grammar,
    TJR

    Sway bar mount for forward mounted shocks: https://www.ebay.com/itm/Tekno-EB410...4AAOSwYNxahFkq

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Old 10-11-2017, 06:14 AM
  #1441  
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Originally Posted by symmetricon
Yeah, where are the pics?
A bit to go yet...
Attached Thumbnails Tekno RC EB410 Thread-eb410_00.jpg  
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Old 10-11-2017, 06:24 AM
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Old 10-11-2017, 06:36 AM
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If that is a weight in the back of the buggy in the pics, I wonder if we could see weights made to fit the milling?
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Old 10-11-2017, 06:41 AM
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Originally Posted by Cain
If that is a weight in the back of the buggy in the pics, I wonder if we could see weights made to fit the milling?
It's a pretty big weight. 50g No rear chassis brace either which seems strange.
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Old 10-11-2017, 06:55 AM
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Originally Posted by celt
A bit to go yet...
Are your rear hubs on the wrong side?
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Old 10-11-2017, 06:57 AM
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Originally Posted by MX304
It's a pretty big weight. 50g No rear chassis brace either which seems strange.
I expected to see a weight like that for a low traction track. That's crazy to see it on a carpet track. Just roughly estimating, I bet that weight makes the car close to 50/50 for the front to rear weight bias.

Anyone on here have their cars ready to race that can toss it on a corner scale to find the front/rear bias? All my math says it has more weight on the front than the rear out of the box, but some real world numbers would be nice.
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Old 10-11-2017, 07:33 AM
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Just got Shipping notification from Fierce RC Just need to get my hands on some option parts now. I assume that the carbon towers, and center diff brace will sell out quickly, I'm hoping for spring options too...
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Last edited by suzukipro; 10-12-2017 at 08:07 AM.
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Old 10-11-2017, 07:36 AM
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Originally Posted by vwduud
Are your rear hubs on the wrong side?
He's right, you need to swap them around
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Old 10-11-2017, 07:39 AM
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Originally Posted by symmetricon
Yeah, where are the pics?
All over FB.


Oh, And all pre-orders are shipping this morning through FierceRC. We all got our shipping info this morning.
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Old 10-11-2017, 08:05 AM
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so if they are putting weight on the back for high traction carpet, what is this going to mean for dirt or medium clay?
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Old 10-11-2017, 08:06 AM
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Old 10-11-2017, 08:15 AM
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Originally Posted by AJrollin
so if they are putting weight on the back for high traction carpet, what is this going to mean for dirt or medium clay?
First weekend racing the car, first race on carpet.....They're trying quick stuff to get the feel they want.

Also bear in mind, usually with mod cars, you don't want the lightest buggy, most are not at the weight limit. Some might want a heavier buggy. (Serpent 4wd 10th is 1900g's from what I have seen)

I'm sure that just like the sct, it's going to take some more testing and figuring for the racers to figure things out.

I'd like to see under the hood on matt's 13.5 car, and what his weight is. He's doing very well in teh 13.5 class with it.
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Old 10-11-2017, 08:44 AM
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Originally Posted by AJrollin
so if they are putting weight on the back for high traction carpet, what is this going to mean for dirt or medium clay?
Originally Posted by dbizzle5


















Thanks for taking the time to get these up. Did you check weight balance at the corners or mess with that any?
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Old 10-11-2017, 09:01 AM
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Originally Posted by mustangkillaz
Thanks for taking the time to get these up. Did you check weight balance at the corners or mess with that any?
Not many have been dumb and wasted their $$ on a corner scale system....Besides onroad guys....and me.

I'll have the corner weights setup next week when I finish the build.
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Old 10-11-2017, 09:13 AM
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Originally Posted by EbbTide
I'm definitely starting with the optional spur if I can get it before finishing the kit. The rest will be trial and error gearing lol
So what gear does it come with and what gear does it need? I see OCRC has them in stock now. Will be checking it out tonight. Just not sure I am ready to get rid of the B64 yet, but this is an awesome looking new car.
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