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ZOOM HB-910 - another trickstuff clone dh & enduro

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ftajiri:
http://pt.aliexpress.com/item/1005006219304940.html?spm=a2g0o.productlist.main.1.737c5057VBG7Cn&algo_pvid=71a7f85a-5b3b-4c32-b1d5-acf54a7fe52a&algo_exp_id=71a7f8 5a-5b3b-4c32-b1d5-acf54a7fe52a-0&pdp_npi=4%40dis%21BRL%211188.87%21558.77%21%21%211648.00%21%21%402103011017011317103448367e1a5d%2112000036333168563%21sea%21BR%21108004534%21&curPageLogUid=20Z0B9ggw1gv

scar4me:
I've got a set of these sat in customs at the moment.
Will report back with detailed pictures n feedback once they arrive.

Scar

scar4me:
So...
I've had a good look over them and can confirm some spec and impressions:
Caliper Pistons: 16mm/14mm pairs (I'd hoped they were 17/15)
Lever: 10mm piston, pivots 12mm apart, with lever grip 40-75mm from the master pivot and a nice curl at the tip.
Lever clamp: Compatible with Sram matchmaker clamp. (using sram clamp and bolt)
Finishing: Pretty good, anodising is a little fragile and can see where it's knocked about in the box a bit on a few of the sharper edges.
Initial impressions: Very good

1 lever came with one of the lever bolts half way undone, so had to tighten that up.
Took the chance to strip down the lever pivot assembly and get a good look at it. No loctite on any bolts, so will add some.
Can't comment on lever feel under hard pulls yet as not had it on a bar n disc yet, but initial impressions are good.
There is a slight forward back play from the tolerances of the threaded pivot section on the reach adjustment pin, but this could be due to the bearings.
Will look to get some 2rs bearings installed instead of the zz metal shielded ones.
Pistons look to be stainless, and fully hollow under the pad.
Need to reset the pistons back and check how freely they each move as they were uneven when received (had pads and spacer fitted)
I think the hoses aren't done up tight enough from factory, as I could twist the lever and holding the hose it would rotate in the lever.
Will take the lever off and review the barb/olive situation soon anyway as need to internally route the rear one.
pics: https://www.pinkbike.com/u/scar4me/album/Stuff/

Will update again when i've had a chance to fit, bed in ad actually get some usage.

ftajiri:

--- Quote from: scar4me on December 07, 2023, 09:12:59 AM ---So...
I've had a good look over them and can confirm some spec and impressions:
Caliper Pistons: 16mm/14mm pairs (I'd hoped they were 17/15)
Lever: 10mm piston, pivots 12mm apart, with lever grip 40-75mm from the master pivot and a nice curl at the tip.
Lever clamp: Compatible with Sram matchmaker clamp. (using sram clamp and bolt)
Finishing: Pretty good, anodising is a little fragile and can see where it's knocked about in the box a bit on a few of the sharper edges.
Initial impressions: Very good

1 lever came with one of the lever bolts half way undone, so had to tighten that up.
Took the chance to strip down the lever pivot assembly and get a good look at it. No loctite on any bolts, so will add some.
Can't comment on lever feel under hard pulls yet as not had it on a bar n disc yet, but initial impressions are good.
There is a slight forward back play from the tolerances of the threaded pivot section on the reach adjustment pin, but this could be due to the bearings.
Will look to get some 2rs bearings installed instead of the zz metal shielded ones.
Pistons look to be stainless, and fully hollow under the pad.
Need to reset the pistons back and check how freely they each move as they were uneven when received (had pads and spacer fitted)
I think the hoses aren't done up tight enough from factory, as I could twist the lever and holding the hose it would rotate in the lever.
Will take the lever off and review the barb/olive situation soon anyway as need to internally route the rear one.
pics: https://www.pinkbike.com/u/scar4me/album/Stuff/

Will update again when i've had a chance to fit, bed in ad actually get some usage.

--- End quote ---


nice appointments

poor anodizing is common on this low level brakes... the wise choice is for natural aluminum, and to give real finish an polish the edges

scar4me:
Another minor update.
Found the lever bleed port screw to be way over torque.
Rounded the 2.5mm hex, so had to 'adjust' it up to t10 torx using my mallet. (Works fine now)
Also not sure what oil they've put in (pink tinge colour), but was a chunk heavier than my lhm+ I re-bled them with.
I.e. wouldn't even mind in the syringe, and separated immediately to the bottom.

Lever throw is really good now, not short or too long, but smooth and consistent with loads of usable reach adjustment range.
Just gotta bed in and see how they run.

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