Poor man's light E-MTB :D - LCE930 18.6kG

[borysgo2]

Hi
I have ordered LCE930 frame in March and finally got all bits and pieces to put it back together. Bike came out at 18.65Kg with no pedals.
Had some minor issues during the build but got it sorted. M820 motor had 36V firmware instead of 43V, got helped and managed to flash proper one.
Most of the time I was experimenting with speed sensor, after a few setups, came up with mounting the speed sensor bolted to one of the pivot bolts (drilled and tapped M3) and 3mm diameter neo-magnet stuffed into the brake disc. Speed sensor cable had to be extended by about 50mm. Now speed is reading without any errors (slow and fast - 100% accurate).

First ride:
Got about 17,5km done, mostly in S and S+ mode, ended up with 55% battery left. I weight about 90kG so IMHO it is a good result.
M820 motor have some high pitch noise character but it is quiet and not disturbing, power delivery is nice and smooth.
LCE930 frame is very good quality, all tolerances, finish, Enduro bearings, fitting kit - very happy with all that (maybe I will replace headset top cap in future). During the ride frame is absolutely quiet, no noises, creaks, smooth ride. Rear suspension is rather on active side but does not blow through the travel too quick. I have putt 170mm Liryk up front which resulted in about 63,5DEG head tube angle. Size L frame have reach about 480mm but in real life bike feels kind of short. Frame is stiff and I can feel that straight away, big difference in compare to Rise I have. Overall very happy with the project, highly recommended.

Total cost about 4,5k EUR.

Regards
Peter

 

[clix]

Did you make the battery yourself?
Considering the weight, I would assume so? How big is it?

 

[borysgo2]

Did you make the battery yourself?
Considering the weight, I would assume so? How big is it?

Battery is 410Wh bafang BT014. I have used light stuff whenever I could. DIY wheelset did the job. I think, carbon rims, carbon cranks and DIY battery can save further 0.6kg.

 

[clix]

Wow, very impressive weigth for stock 410wh battery!
Mine is cca 21kg without pedals(and a bit of mud ) , built for the same price. But with a coil shock and heavier wheels and tyres.

 

[borysgo2]

Wow, very impressive weigth for stock 410wh battery!
Mine is cca 21kg without pedals(and a bit of mud ) , built for the same price. But with a coil shock and heavier wheels and tyres.

I counted every gram to shave the weight. Even magnet is small

 

[Mabman]

Not sure I would actually huck that off a cliff but nice job on the overall build!

 

[borysgo2]

A bit of a test ride video bellow. Done about 120km so far, first impressions are very good. Have a few minor upgrades to do and the bike will be finished up 100%.

 

[Grendel]

Congrats, man. That's a good looking bike!!!

 

[Freda]

Hi! Nice bike, I am interested in how you attached the speed sensor. I can see some of it in the pictures, but did you drill into the frame pivot bolt?

 

[borysgo2]

Hi! Nice bike, I am interested in how you attached the speed sensor. I can see some of it in the pictures, but did you drill into the frame pivot bolt?

Yes, pivot bolt is drilled and tapped with M3 thread. Sensor must be sanded down a bit to fitt in. Sensor cable must be extended about 40 to 60mm. Now the ori big magnet was causing erratic speed reading when wheel was spinning slow display was showing about 65km/h. 3mm neo magnet is working perfect. Easiest way is to drill 2,5mm diameter hole through the disc and than drill 3mm about 90% thickness of the disc, so the magnet will not go through.

 

[borysgo2]

Small update.
Fenders are on --> RRP Mudguard
Headset replaced with acros is52 - fits nicely, cables are well sealed, there is also more room for them because inner diameter of acros bearings is larger than the stock ones. There is extra seal at the headset top cover and fork race (well designed).

Regards

 

[kevinkeenan]

Looks great! Do you have a link for the Acros headset?

 

[borysgo2]

is52 headset from acros needs 3 part numbers:

1. Cover

is52 headset cover - integrated cable routing

Headset cover for acros is52-headset-upper-parts with integrated cable routing (icr). The icr-headset-cover has an outer diameter (od) of 56mm and a height of 9,5mm. The two rubber plugs included each have three prepared cable...

acros-components.com

2. Crown race 1,5''

crown race 1.5" for ec44, ec49, zs55, zs56 & is52

Crown race with integrated sealing for optimal protection of the headset bearing against moisture and dirt. Compatible with acros headsets ec49, zS55, zS56 and is52 in combination with 1.5" steerer tube (40mm) at the bottom.

acros-components.com

3. Bearing set is52/is52.

is52/is52 bearing kit - integrated cable routing

Replacement headset bearings for frames with 52mm bearing seat of the head tube at the top and bottom and integrated cable guide (icr). Our is52/is52 bearing set consists of two angular contact ball bearings and a special centering ring...

acros-components.com

4. Optional get extra compression ring.

compressionring + IPS for integrated cabel routing

Compression ring for integrated cable routing (icr) including a internal protection sealing (ips) for additional protection of the headset bearings against moisture and dirt. Compatible with the semi-integrated acros...

acros-components.com

 

[borysgo2]

Today I had to remove the motor to check all connections (have some not charging issues) and found that the front bolt holding the motor have a bad tolerance on non drive side, as a result motor was not secured properly + hade some loud click noise every so often. Pictures will tell more than a 1000 words. Just filed down one of the spacer a bit and all is OK now.

 

[brbr]

Today I had to remove the motor to check all connections (have some not charging issues) and found that the front bolt holding the motor have a bad tolerance on non drive side, as a result motor was not secured properly + hade some loud click noise every so often. Pictures will tell more than a 1000 words. Just filed down one of the spacer a bit and all is OK now.

View attachment 128301 View attachment 128302 View attachment 128303

Interesting, I’ll check next time I will remove the motor!