Search found 727 matches

by Overclocker
Jan 30 2021 8:47am
Forum: EBike General Discussion
Topic: Spring or air??
Replies: 41
Views: 1054

Re: Spring or air??

The reason air doesn't work as well in a rear shock is because the shaft has to be enlarged for air, which carries a larger sticktion penalty than a thin shaft on a coil spring shock. Sticktion reduces small bump and low (shaft) speed tracking. So air shocks just aren't as smooth as coil shocks. Ye...
by Overclocker
Jan 28 2021 10:30pm
Forum: EBike General Discussion
Topic: Spring or air??
Replies: 41
Views: 1054

Re: Spring or air??

I hate having to pump up my air fork every 2 weeks. Maybe that's just because it's a DNM, but I wouldn't get an air fork in the future. put some fox float fluid (the air chamber lube, not damper fluid) or mix some SuperLube teflon grease w/ some fork oil. this solved my air leakage issue (not DNM)
by Overclocker
Jan 28 2021 6:32am
Forum: EBike General Discussion
Topic: Spring or air??
Replies: 41
Views: 1054

Re: Spring or air??

coil is great if you got the correct spring rate. if not then you may have to experiment w/ different springs. with air you simply change your pressure w/ a shock pump air has more stiction so less small bump sensitivity coil more robust, maintenance free except for the damper part. air shocks need ...
by Overclocker
Jan 28 2021 3:15am
Forum: EBike General Discussion
Topic: Fabricating a Super73 like frame and fork
Replies: 19
Views: 631

Re: Fabricating a Super73 like frame and fork

https://i.imgur.com/m2Af0c9.jpg ERW pipe is fine. on this bike i used 1.8mm wall because i was using fluxcore at that time. i got co2 MIG now i'm building another one w/ 1.4mm wall steel is the way to go w/ garage builds but if you're equipped then 6061. requires big quenching tank and heat treat t...
by Overclocker
Jan 23 2021 11:12pm
Forum: EBike General Discussion
Topic: gap between swing arm and disc brake -- suggestions?
Replies: 26
Views: 793

Re: gap between swing arm and disc brake -- suggestions?

https://i.imgur.com/GCIPc8t.png enlarge the holes or drill/tap new ones on the red dots for M6 bolts. then bolt on a SOLID spacer "donut". then attach rotor disc to the donut using a different set of holes agree w/ serious_sam, using long M5 bolts is a dodgy solution. it's easy to visuali...
by Overclocker
Jan 21 2021 2:30am
Forum: EBike General Discussion
Topic: Vector Light Frame - Any others I should consider?
Replies: 11
Views: 303

Re: Vector Light Frame - Any others I should consider?

IMG_20210109_173232 (Medium).jpg
IMG_20210109_173232 (Medium).jpg (297.13 KiB) Viewed 198 times
check w/ vector if the frame is still available

here's mine w/ 17s6p 18650 pack and controller all inside the box frame, to maintain that sleek look
by Overclocker
Jan 17 2021 10:11am
Forum: EBike Non-hub Motor Drives
Topic: Mid drive noob question
Replies: 11
Views: 386

Re: Mid drive noob question

20181025-1224495.jpg from vector website seems to be an off-the-shelf moto hub. ask them directly what it is. if you're getting the vortex frame you probably can't use surron/lmx hub w/ it btw the vortex is ugly AF. all straight tubes like they don't have a tube bender :lol: hubmotor in swingarm re...
by Overclocker
Jan 17 2021 5:26am
Forum: EBike Non-hub Motor Drives
Topic: Mid drive noob question
Replies: 11
Views: 386

Re: Mid drive noob question

IMG_20210116_152001 (Medium).jpg don't use a bicycle hub. get a surron or LMX rear hub. here i'm using a moto hub but i drilled and tapped it to accept bicycle rotor Do you know where I can find details about sur ron hubs? I prefer them over the lmx hubs because they're a third of the price. what d...
by Overclocker
Jan 16 2021 2:37am
Forum: EBike Non-hub Motor Drives
Topic: Mid drive noob question
Replies: 11
Views: 386

Re: Mid drive noob question

IMG_20210116_152001 (Medium).jpg
IMG_20210116_152001 (Medium).jpg (227.37 KiB) Viewed 301 times
don't use a bicycle hub. get a surron or LMX rear hub. here i'm using a moto hub but i drilled and tapped it to accept bicycle rotor
by Overclocker
Jan 09 2021 9:12am
Forum: EBike Build Threads
Topic: Non-overclocked Vector Light Build
Replies: 36
Views: 6919

Re: Non-overclocked Vector Light Build

IMG_20210109_173400 (Medium).jpg did a few changes since the last pic. went back to to a single-crown fork w/ 26" wheel. fatter rear tire to balance it out, 2.75 x 17 kelly controller KLS7212, heatsinked to the frame. solves the overheating issue. shall elaborate on this on a future post. Look...
by Overclocker
Jan 05 2021 2:43am
Forum: EBike General Discussion
Topic: I need a light enduro frame for next build....
Replies: 39
Views: 1456

Re: I need a light enduro frame for next build....

IMG_20201130_091947.jpg i got a vector light 135mm swingarm. i think there's a wider version. swingarm looks thin but is triangulated, so is actually very strong. i picked a DD hub (QS 205 35h), a small geared hub might be too weak for this kind of build fitting nicely inside are a 17s6p 18650 pack...
by Overclocker
Jan 04 2021 12:47am
Forum: Motor Technology
Topic: No load motor, controller testing, runaway.
Replies: 16
Views: 426

Re: No load motor, controller testing, runaway.

yep happened to me while bench testing em100 with QS motor 120 70h, no load. good thing it's an IPM so no magnets flew. motor went crazy and wouldn't stop. had to cut power

you need to dial back the flux weakening settings to prevent this from happening
by Overclocker
Jan 01 2021 11:36pm
Forum: EBike Technical
Topic: Need a Solder station.
Replies: 9
Views: 386

Re: Need a Solder station.

quicko.jpg
quicko.jpg (81.27 KiB) Viewed 251 times
i power it w/ a ryobi 18v pack, the portability is a big plus

uses hakko tips. quick heating

sufficient to solder 12ga to an xt90, but not 10ga
by Overclocker
Dec 26 2020 4:21am
Forum: EBike General Discussion
Topic: 20mm thru-axle hub bearings are too weak...
Replies: 13
Views: 446

Re: 20mm thru-axle hub bearings are too weak...

Cartridge bearings that display any roughness or noise at all have already failed. Your 6201 bearings still turn because they don't have nearly as many balls as your 6805 bearings, so not as many places to rust solid. If you contaminate 6904 bearings, they'll crap out too. It seems me to that you c...
by Overclocker
Dec 26 2020 3:47am
Forum: EBike General Discussion
Topic: 20mm thru-axle hub bearings are too weak...
Replies: 13
Views: 446

Re: 20mm thru-axle hub bearings are too weak...

http://www.ckit.co.za/secure/conveyor/troughed/bearings/bearings_skf.html The seize-resistant concept SKF reluctantly accepted the inevitable penetration of grit, dirt and other abrasive contaminants into the raceways and rolling elements and designed seize-resistant ball bearings. Its special inter...
by Overclocker
Dec 24 2020 8:56am
Forum: EBike General Discussion
Topic: 20mm thru-axle hub bearings are too weak...
Replies: 13
Views: 446

Re: 20mm thru-axle hub bearings are too weak...

If you've got contamination, that's your fundamental problem. Nothing to do with bearing size. well there's nothing that could be done to prevent water getting in. so if a bit larger bearing can extend MTBF somewhat then that's good enough for me btw i define failure as totally seized up :lol: i ju...
by Overclocker
Dec 24 2020 5:30am
Forum: EBike General Discussion
Topic: 20mm thru-axle hub bearings are too weak...
Replies: 13
Views: 446

Re: 20mm thru-axle hub bearings are too weak...

I think you may misunderstand the source of axial preload that wrecks bearings. It's almost always a mismatch of the distance across the bearing seats versus the width of the inner race spacer. If those dimensions are in agreement, you can tighten the axle as much as you please and it's fine. If th...
by Overclocker
Dec 23 2020 11:27pm
Forum: EBike General Discussion
Topic: 20mm thru-axle hub bearings are too weak...
Replies: 13
Views: 446

Re: 20mm thru-axle hub bearings are too weak...

so my bearings went bad ... any thoughts? What do you mean "went bad" ? Did you disassemble to inspect ? What is the condition of the grease? Got photos ? If you have corrosion, try stainless bearings, and more regular cleaning. abbah uses 6805 bearings as well 6805 is common in HD/qualit...
by Overclocker
Dec 23 2020 10:22pm
Forum: EBike General Discussion
Topic: 20mm thru-axle hub bearings are too weak...
Replies: 13
Views: 446

Re: 20mm thru-axle hub bearings are too weak...

MadRhino wrote:
Dec 23 2020 2:58pm
Buy a pro DH hub, even a used one. My favorites are Sun Ringlé Bubba or Abbah, DT Swiss 440 or DTFR, and the likes...
abbah uses 6805 bearings as well
by Overclocker
Dec 23 2020 10:06pm
Forum: EBike General Discussion
Topic: 20mm thru-axle hub bearings are too weak...
Replies: 13
Views: 446

Re: 20mm thru-axle hub bearings are too weak...

The bearings are plenty strong; you're just not giving them the conditions they need. It's important that radial groove cartridge bearings like these do not have an axial preload on them. Ideally you will know they don't because they have a miniscule amount of free side play. If you don't squeeze t...
by Overclocker
Dec 23 2020 5:53am
Forum: EBike General Discussion
Topic: 20mm thru-axle hub bearings are too weak...
Replies: 13
Views: 446

20mm thru-axle hub bearings are too weak...

IMG_20191206_140740 (1) (Medium).jpg so my bearings went bad again after just a few months! these are 6805-2rs. 25 x 37 x 7mm. the bearing balls are just too small for heavy-duty ebike applications so now i'm thinking of upgrading these hubs to bigger bearings. 6904 (20 x 37 x 9mm). same 37mm O.D. ...
by Overclocker
Dec 14 2020 5:18am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Small space, big power?
Replies: 28
Views: 1037

Re: Small space, big power?

sarcastic? why would you think that what's wrong w/ you :shock:

taiwan is awesome. they got gogoros etc. if i had a kymco to convert i'd definitely use molicels. my next build's gonna use moli p26a
taiwan-flag.jpg
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by Overclocker
Dec 13 2020 10:06pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Small space, big power?
Replies: 28
Views: 1037

Re: Small space, big power?

taiwanese bike deserves taiwanese cells :lol: molicel
by Overclocker
Nov 27 2020 8:39pm
Forum: EBike Non-hub Motor Drives
Topic: Light dirt bike, QS 120 70h motor, custom steel frame
Replies: 203
Views: 43858

Re: Light dirt bike, QS 120 70h motor, custom steel frame

[youtube]2Fb8SAME_uA[/youtube]
IMG_20201120_081847_2 (Medium).jpg
IMG_20201120_081847_2 (Medium).jpg (420.97 KiB) Viewed 226 times