BMX Track II: The Wrath of KOS  RSS Feed

#1 2012-11-15 4:27pm

Space-Man
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BMX Track II: The Wrath of KOS

Just picked up this complete 1-owner survivor 1981 KOS a couple of weeks ago.  It arrived yesterday.  Going to take my time and go through it carefully when re-assembling.  Wheels are dead straight but the spokes need to be tightened/trued here and there.  Very minimal pitting in a few places, a little Barkeepers and some polish should take care of it.  The bike is beautiful and a keeper.

Now the big question.  The bike has been a 5-speed all its life I assume.  Had no idea how they did this BITD, were they using a special hub, was the frame modified or did they just spread the drops and stick the wheel in.  Turns out it was #3.  The frame to its credit is still right at 110mm according to my dial calipers.  The hub on the other hand is 120mm. 

So I guess I have two options.  #1- just put it back together as is and forget about it, it already survived 30 years that way.  #2- re-lace the wheel to a 110mm hub or swap the guts and put it back to a single speed.  Opinions?


http://i1186.photobucket.com/albums/z380/4sale_space/1981%20KOS/CIMG0366.jpg

http://i1186.photobucket.com/albums/z380/4sale_space/1981%20KOS/DSC_0566.jpg

http://i1186.photobucket.com/albums/z380/4sale_space/1981%20KOS/DSC_0558.jpg

http://i1186.photobucket.com/albums/z380/4sale_space/1981%20KOS/DSC_0559.jpg

http://i1186.photobucket.com/albums/z380/4sale_space/1981%20KOS/DSC_0560.jpg

As a complete posted in Shad's "My Bikes"
http://bmxmuseum.com/bikes/mongoose/596 … KWH_Wcyoqc


space2012

Last edited by Space-Man (2013-01-05 10:49am)


Eye of the Survivor

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#2 2012-11-15 4:43pm

Burning River
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Re: BMX Track II: The Wrath of KOS

Good lord that KOS is rad , and I'd be perplexed myself . cool


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#3 2012-11-15 4:47pm

TXBONE
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Re: BMX Track II: The Wrath of KOS

Awesome. I would make it how you like it. I got my kos with all OG finish parts. The only thing I changed on mine was the rear hub was a rusted bendix coaster brake with rusted hubs and the front was a rusted shimano hubb with rusted spoked. S I got some old bullseye gold hubs and new spokes and had the front rim laced to the rear because it had a front brake originally and had the non rubbed rim laced to the front since I wasn't going to be running a front brake.


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[img]http://i1228.photobucket.com/albums/ee447/SEA_ELECTRIC/Internet%20bs%20images/815a8d608e0c528b08240357ddbcb522_zpsdedf4245.jpg[/img]

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#4 2012-11-15 5:00pm

unfit4society
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Re: BMX Track II: The Wrath of KOS

Mr. Miyagi was very crafty.

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#5 2012-11-15 5:10pm

Space-Man
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Re: BMX Track II: The Wrath of KOS

I also forgot to mention, if any one can give me measurements on the approximate location of the decals I would appreciate it.  Going to order a new set.  The only ones left are the seat stays.

I would prefer to keep it a multi-speed setup for originality sake and because it would make those long cruises just a little easier.  But not at the expense of the frame.  I don't mind spreading drops a 1/8" or so, but almost a half inch is a lot.


Eye of the Survivor

I check the WTB section almost everyday, please try and do the same.
You may hook someone up and make some money to buy more parts.
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#6 2012-11-17 6:43am

84pk
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Re: BMX Track II: The Wrath of KOS

Nice one Rob.  Get it back to single speed for sure.  That will definitely be alot of fun to ride smile


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#7 2012-11-17 6:47am

Space-Man
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Re: BMX Track II: The Wrath of KOS

84pk wrote:

Nice one Rob.  Get it back to single speed for sure.  That will definitely be alot of fun to ride smile

I "could" build up a set of 26" pro class wheels I have as a single speed and keep the original arayas 5-sp for the time being.

I will be swapping out the Brute for a real nice gold double clamp I have stashed.


Eye of the Survivor

I check the WTB section almost everyday, please try and do the same.
You may hook someone up and make some money to buy more parts.
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#8 2012-11-17 7:24am

tcbmx
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Re: BMX Track II: The Wrath of KOS

Space-Man wrote:

84pk wrote:

Nice one Rob.  Get it back to single speed for sure.  That will definitely be alot of fun to ride smile

I "could" build up a set of 26" pro class wheels I have as a single speed and keep the original arayas 5-sp for the time being.

I will be swapping out the Brute for a real nice gold double clamp I have stashed.

that there sounds like a great idea. I'd say go single speed all the way, but hell if you ever wanted to change that up in the future you'd still have the option.


What's the point of having a bike if you're not going to ride it?

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#9 2012-11-17 7:32am

Coco
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Re: BMX Track II: The Wrath of KOS

Space-Man wrote:

I I don't mind spreading drops a 1/8" or so, but almost a half inch is a lot.

Space Man, the KOS should already be spaced at 120mm in the rear, not 110mm so you shouldn't have to spread anything except peanut butter on your toast. Strange yours is at 110mm.

I have an 81 myself and had my Phil Wood hubs space at 120mm to fit the frame properly and they slid right in. Just look at all the KOS's in the Mongoose section for decal placement reference.

Last edited by Coco (2012-11-17 8:22am)

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#10 2012-11-17 10:22am

Space-Man
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Re: BMX Track II: The Wrath of KOS

Coco wrote:

Space-Man wrote:

I I don't mind spreading drops a 1/8" or so, but almost a half inch is a lot.

Space Man, the KOS should already be spaced at 120mm in the rear, not 110mm so you shouldn't have to spread anything except peanut butter on your toast. Strange yours is at 110mm.

I have an 81 myself and had my Phil Wood hubs space at 120mm to fit the frame properly and they slid right in. Just look at all the KOS's in the Mongoose section for decal placement reference.

Coco

I respectfully disagree and here is why.  Of the 75 or so KOS cruisers in the museum I clicked on roughly 40 of them to look and see how many had multi speed setups to try and learn more about it before I bought this one.  I could really only find 4 or 5 that had a derailleur and very little other information about them.  This frame is 110mm, I have a dial caliper, it is right at 4.400" or multiplied by 25.4 , 111 mm.  The hub of course is 120mm.  So it seems to me that they just spread the frame BITD and called it good.  Which is fine if that's how it was done.  Or maybe they ran a few frames off at some point that had 120mm spacing.

If I build this other wheelset I can run it both ways other than having to dork around with the chain.

Thanks for the input.


Eye of the Survivor

I check the WTB section almost everyday, please try and do the same.
You may hook someone up and make some money to buy more parts.
  smile

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#11 2012-11-17 11:50am

Coco
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Re: BMX Track II: The Wrath of KOS

The one I had was built up as a 5-speed I believe, before I got my hands on the frame and fork. A 120mm hub slid right in.

Perhaps some did come spaced for both, or just had the frame spread out from 110mm. I was sure I read somewhere that they came 120mm spaced though.

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#12 2012-11-17 11:55am

Space-Man
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Re: BMX Track II: The Wrath of KOS

Coco wrote:

The one I had was built up as a 5-speed I believe, before I got my hands on the frame and fork. A 120mm hub slid right in.

Perhaps some did come spaced for both, or just had the frame spread out from 110mm. I was sure I read somewhere that they came 120mm spaced though.

Cool.  Yeah that could be.  Its too nice out right now to build it back up today, going for a ride on my Holmes 22".

Stay tuned for updates.


Eye of the Survivor

I check the WTB section almost everyday, please try and do the same.
You may hook someone up and make some money to buy more parts.
  smile

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#13 2012-11-17 11:57am

williwoods
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Re: BMX Track II: The Wrath of KOS

I would go single-speed: re-space the rear hub to 110 with new spacers and trim the axle down if you need to. You may also have to re-dish the rim/hub for 110 so that your rim sits true int he middle of your frame.

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#14 2012-11-17 12:20pm

townslo
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Re: BMX Track II: The Wrath of KOS

Leave it a 5 speed, I saw this at the bike show in Vancouver Wa before Shad bought it and that is how the guy bought it originally. No need to mess with it and change it to a single speed. Clean it up, tighten it up, add some decals and Bob's your uncle!

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#15 2012-11-17 1:27pm

Space-Man
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Re: BMX Track II: The Wrath of KOS

townslo wrote:

Leave it a 5 speed, I saw this at the bike show in Vancouver Wa before Shad bought it and that is how the guy bought it originally. No need to mess with it and change it to a single speed. Clean it up, tighten it up, add some decals and Bob's your uncle!

Awesome that you remember it.  I think the OG owner's name was Fred, not Bob.  lol


Eye of the Survivor

I check the WTB section almost everyday, please try and do the same.
You may hook someone up and make some money to buy more parts.
  smile

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#16 2012-11-17 1:42pm

nzpantha
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Re: BMX Track II: The Wrath of KOS

Run the gears man. To cool to mess with.

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#17 2013-01-05 10:55am

Space-Man
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Re: BMX Track II: The Wrath of KOS

Finally got it back together (a few weeks ago).  Made a few minor changes.  Swapped in a real nice OG gold stem and had to go to a different seat post.  I am too short to run the DX without jacking up the stenciling.  All the parts are basically mint.  Though the chain ring teeth are pretty chewed up so that may need to be swapped out soon also.  Still need to order decals.

http://i1186.photobucket.com/albums/z380/4sale_space/1981%20KOS/DSC_0681.jpg

http://i1186.photobucket.com/albums/z380/4sale_space/1981%20KOS/DSC_0682.jpg

http://i1186.photobucket.com/albums/z380/4sale_space/1981%20KOS/DSC_0683.jpg

http://i1186.photobucket.com/albums/z380/4sale_space/1981%20KOS/DSC_0684.jpg

http://i1186.photobucket.com/albums/z380/4sale_space/1981%20KOS/DSC_0685.jpg

http://i1186.photobucket.com/albums/z380/4sale_space/1981%20KOS/DSC_0686.jpg

http://i1186.photobucket.com/albums/z380/4sale_space/1981%20KOS/DSC_0687.jpg


Eye of the Survivor

I check the WTB section almost everyday, please try and do the same.
You may hook someone up and make some money to buy more parts.
  smile

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#18 2013-01-05 10:59am

jsngrimm
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Re: BMX Track II: The Wrath of KOS

Turned out great! Great example of a classic looptail cruiser! cool


--Current Rides--
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#19 2013-01-05 1:53pm

Socalbmx4life
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Re: BMX Track II: The Wrath of KOS

I have an 81 kos as well it had a single speed Shimano hub , it rode great fine but couldn't do much ... Almost impossible to pull a wheelie on it and not much maneuverability either because of the gearing and lets face it , it's a big bike . I chose a Shimano Inter shift 4 speed hub  and with out a doubt it was the best choice I could have made . I think the five speed cluster makes it look like a mountain bike plus the clatter of the chain the mis shifts and if you jump it pray that the chain doesn't come off . With the inter shift hub it uses a single speed chain   it has a ratchet button click shifter so you can pull up a wheelie in 1st gear and hit up shift and  without it fumbling to find it your in 2nd gear flying on one wheel . You can get it in a free wheel or coaster brake . I  love this bike set up like this ... Some food for thoughthttp://i379.photobucket.com/albums/oo233/macGz28/KOS040_zpsedd471f2.jpg
http://i379.photobucket.com/albums/oo233/macGz28/KOS037copy_zps1c3ab2cb.jpg

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#20 2013-01-05 3:41pm

RoadRunner
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Re: BMX Track II: The Wrath of KOS

Nice score!

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#21 2013-01-05 3:45pm

Space-Man
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Re: BMX Track II: The Wrath of KOS

Socalbmx4life wrote:

I have an 81 kos as well it had a single speed Shimano hub , it rode great fine but couldn't do much ... Almost impossible to pull a wheelie on it and not much maneuverability either because of the gearing and lets face it , it's a big bike . I chose a Shimano Inter shift 4 speed hub  and with out a doubt it was the best choice I could have made . I think the five speed cluster makes it look like a mountain bike plus the clatter of the chain the mis shifts and if you jump it pray that the chain doesn't come off . With the inter shift hub it uses a single speed chain   it has a ratchet button click shifter so you can pull up a wheelie in 1st gear and hit up shift and  without it fumbling to find it your in 2nd gear flying on one wheel . You can get it in a free wheel or coaster brake . I  love this bike set up like this ... Some food for thoughthttp://i379.photobucket.com/albums/oo23 … d471f2.jpg
http://i379.photobucket.com/albums/oo23 … 3ab2cb.jpg

All very valid and spot on observations.  Does the 4 speed hub have 110 or 120mm spacing?  I wonder if I could lace it using the same spokes.

If this setup is in the highest gear you really can't backpedal too much, the chain will jump right off.


Eye of the Survivor

I check the WTB section almost everyday, please try and do the same.
You may hook someone up and make some money to buy more parts.
  smile

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#22 2013-01-05 4:43pm

Socalbmx4life
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From: Huntington Beach, CA
Registered: 2008-04-16
Posts: 133
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Re: BMX Track II: The Wrath of KOS

Space-Man wrote:

Socalbmx4life wrote:

I have an 81 kos as well it had a single speed Shimano hub , it rode great fine but couldn't do much ... Almost impossible to pull a wheelie on it and not much maneuverability either because of the gearing and lets face it , it's a big bike . I chose a Shimano Inter shift 4 speed hub  and with out a doubt it was the best choice I could have made . I think the five speed cluster makes it look like a mountain bike plus the clatter of the chain the mis shifts and if you jump it pray that the chain doesn't come off . With the inter shift hub it uses a single speed chain   it has a ratchet button click shifter so you can pull up a wheelie in 1st gear and hit up shift and  without it fumbling to find it your in 2nd gear flying on one wheel . You can get it in a free wheel or coaster brake . I  love this bike set up like this ... Some food for thoughthttp://i379.photobucket.com/albums/oo23 … d471f2.jpg
http://i379.photobucket.com/albums/oo23 … 3ab2cb.jpg

All very valid and spot on observations.  Does the 4 speed hub have 110 or 120mm spacing?  I wonder if I could lace it using the same spokes.

If this setup is in the highest gear you really can't backpedal too much, the chain will jump right off.

I am not sure on the spacing it fit without any bending or manipulating of the frame , I was lucky and found my hub at the dumpster on a wheel that was bent like a taco and I just happened to have an orphan Arayra hoop so I polished the rim and swapped it over, bought the new shifter with cable for 20 bucks on the bay and have been enjoying it ever since . I don't think the spokes you have now will work unless you cut and re thread them this is a much fatter hub and too much work . I would check out a complete 26" rear wheel  with a Shimano Nexus inter shift hub they come in 3,4,5,7,and 8 speeds and with freewheel or coaster brake . Ive seen a new 26" 3 speed rear wheel go for like 80 bucks and up on E bay .Here is a low budget way to get one ...  I found a girls 26" Electra beach cruiser with that set up on Craigslist for 120 bucks I bought it  took it off and replaced it with a standard coaster brake rear wheel and then re sold the bike for 100 bucks and I got the whole enchilada for $20 bucks and a little work . Something to think about ...

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