Author Topic: ACS STOKER STEM DILEMMA! HELP!! (Read 1877 times)

deeman · « **on:** April 01, 2015, 04:24 PM »

I have an ACS Stoker stem which I would like to perform the potts mod on just as I had bitd. I am having trouble finding a suitable bolt....First of all all the bolts I have tried are too thick to go through the hole in the stem cap, this is not a problem as I can drill it. Secondly, the wedge is kind of a unique shape and looks too thin to get a thicker bolt through as it is contoured on the inside. Is it a case of I just need to find a genuine ACS hollow bolt? or is there another solution Has anyone else had similar bother? or have any advice? I definitely cant remember how my dad did it bitd!!

oldschoolace · « **Reply #1 on:** April 01, 2015, 04:30 PM »

Got any pics of the wedgey bit cocker? diameter of stem hole would be handy too

That Swan Guy · « **Reply #2 on:** April 01, 2015, 05:03 PM »

Just sell me the stem

hotdog · « **Reply #3 on:** April 01, 2015, 05:16 PM »

This may work..

http://bmxmuseum.com/forsale/150715

deeman · « **Reply #4 on:** April 02, 2015, 12:47 AM »

Quote from: oldschoolace on April 01, 2015, 04:30 PM

Got any pics of the wedgey bit cocker? diameter of stem hole would be handy too

Away working tonight, will take some pics / measurements tomorrow. the hole is nearly big enough for the 2 bolts I have but they are too thick for the wedge if that makes sense?

deeman · « **Reply #5 on:** April 02, 2015, 12:48 AM »

Quote from: hotdog on April 01, 2015, 05:16 PM

This may work..

http://bmxmuseum.com/forsale/150715

Thanks dude, I saw that but just looks like a generic bolt and wedge like the 2 I have!

deeman · « **Reply #6 on:** April 02, 2015, 12:49 AM »

Quote from: That Swan Guy on April 01, 2015, 05:03 PM

Just sell me the stem

I have an interested party already but it may be for sale if I can't sort out a potts bolt solution for it ! keep you posted Nick

bobbbbsy · « **Reply #7 on:** April 02, 2015, 01:45 AM »

find a local engineering firm to drill your top . measure your bolt pitch and retap your wedge to make your bolt fit. take 10 mins in the machine shop .

deeman · « **Reply #8 on:** April 03, 2015, 07:44 PM »

here are a few pics of the bolts n wedge Clint

oldschoolace · « **Reply #9 on:** April 03, 2015, 08:10 PM »

HmmmI see what you mean about the groove in the wedge. Would be a bit of a fiddle to bore out that groove but probably the easiest option if you can't find the right bolt.

rodriguez · « **Reply #10 on:** April 03, 2015, 08:38 PM »

What about one of these

http://www.ebay.co.uk/itm/NOS-Odyssey-Hollow-Bolt-Old-School-BMX-Stem-Bolt-Potts-Mod-For-BMX-Bikes-/191340630083?pt=LH_DefaultDomain_3&hash=item2c8cca5043

deeman · « **Reply #11 on:** April 03, 2015, 09:07 PM »

Quote from: rodriguez on April 03, 2015, 08:38 PM

What about one of these

http://www.ebay.co.uk/itm/NOS-Odyssey-Hollow-Bolt-Old-School-BMX-Stem-Bolt-Potts-Mod-For-BMX-Bikes-/191340630083?pt=LH_DefaultDomain_3&hash=item2c8cca5043

Thanks man I saw those but it won't help me just like the 2 generic bolts I have...the wedge is all wrong for the stem

deeman · « **Reply #12 on:** April 03, 2015, 09:16 PM »

Quote from: oldschoolace on April 03, 2015, 08:10 PM

HmmmI see what you mean about the groove in the wedge. Would be a bit of a fiddle to bore out that groove but probably the easiest option if you can't find the right bolt.

Do you fancy undertaking the job if I lined your palm with silver?? it's beyond my tools and facilities!

oldschoolace · « **Reply #13 on:** April 03, 2015, 09:20 PM »

Always happy to help out if I can mate

Might be worth considering if a local engineer can turn down a bolt to the right diameter and recut the thread. Always good to keep stuff original if possible

deeman · « **Reply #14 on:** April 03, 2015, 09:30 PM »

Quote from: oldschoolace on April 03, 2015, 09:20 PM

Always happy to help out if I can mate
Might be worth considering if a local engineer can turn down a bolt to the right diameter and recut the thread. Always good to keep stuff original if possible

Agreed...yes, that's not a bad idea either-if I get stuck I will give you a shout, thanks for your input Clint

oldschoolace · « **Reply #15 on:** April 03, 2015, 09:35 PM »

No worries mate, you know I like drilling holes in things

rodriguez · « **Reply #16 on:** April 04, 2015, 12:00 AM »

See what you mean, you need a stepped wedge.

What about modifying the wedge off the potts bolt so it's the same shape angle as the ACS wedge, a straight cut across the wedge to make the step, then cut, grind and file to make the same angle.

Here's a crap illustration of what I mean.

deeman · « **Reply #17 on:** April 04, 2015, 12:18 AM »

^^^ that's another good shout but out of my capabilities!

rodriguez · « **Reply #18 on:** April 04, 2015, 12:58 AM »

Quote from: deeman on April 04, 2015, 12:18 AM

^^^ that's another good shout but out of my capabilities!

You might surprise yourself

bobbbbsy · « **Reply #19 on:** April 04, 2015, 02:41 AM »

Quote from: deeman on April 03, 2015, 09:30 PM

Quote from: oldschoolace on April 03, 2015, 09:20 PM
Always happy to help out if I can mate
Might be worth considering if a local engineer can turn down a bolt to the right diameter and recut the thread. Always good to keep stuff original if possible

Agreed...yes, that's not a bad idea either-if I get stuck I will give you a shout, thanks for your input Clint : daumenhoch:

I bloidy said that ages ago .

john4130 · « **Reply #20 on:** April 04, 2015, 07:30 AM »

Quote from: rodriguez on April 04, 2015, 12:00 AM

See what you mean, you need a stepped wedge.

What about modifying the wedge off the potts bolt so it's the same shape angle as the ACS wedge, a straight cut across the wedge to make the step, then cut, grind and file to make the same angle.

Here's a crap illustration of what I mean.

this is what i'm planning on doing for my acs stem, tried for ages to find a hollow bolt with the correct wedge but no luck. another thing we used to do back in the day was to just hacksaw the stem shaft to the angle of the new wedge.

Picklez · « **Reply #21 on:** April 05, 2015, 01:22 PM »

Quote from: rodriguez on April 04, 2015, 12:00 AM

See what you mean, you need a stepped wedge.

What about modifying the wedge off the potts bolt so it's the same shape angle as the ACS wedge, a straight cut across the wedge to make the step, then cut, grind and file to make the same angle.

Here's a crap illustration of what I mean.

This is actually a lot easier than you may think. I modded one for a tuff neck potts mod a few years back. Just need a vice and angle grinder with cutting disc. In this day and age a much better option than butchering a stem quill imho. I'll dig it out later and post a piccie if interested.

Go on, take a brave pill and go for, worst that can happen is a lost finger or two

P

That Swan Guy · « **Reply #22 on:** April 05, 2015, 01:25 PM »

cut the shaft

deeman · « **Reply #23 on:** April 05, 2015, 02:23 PM »

Thanks for the input everyone, It has given me some more food for thought although I am not sure I could really carry out cutting the wegde or the stem shaft as I don't have the facilities and even if I did I would probably fook it up! Not sure I want to butcher the shaft anyway! I had no idea it would be so much aggro when I bought the stem as I had one with potts mod bitd which I am sure came from the bike shop like that, I don't remember having to mess with it at all!

MartyC · « **Reply #24 on:** April 13, 2015, 02:48 PM »

Try and get hold of an ACS Hollow Bolt in the packet is it comes with two wedges, the right one and the wrong one for the stem: