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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  1 1/8th fork conversion on my 91 Sport
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Author Topic: 1 1/8th fork conversion on my 91 Sport  (Read 2678 times)

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Offline ED209

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1 1/8th fork conversion on my 91 Sport
« on: January 12, 2012, 10:25 PM »
Finally got my 99 Haro Mirra 540 Air back from those idiots Yodel who lost it sending it to Wales  :daumenhoch: so I had some Haro 1 1/8th forks to use.

Decided to move the 94 Sport on so it was back to the neon lime 91 Sport and time for the fork conversion.

Thought that there was no way it would work out but it turned out to be easy  :)

Read over the info that James Voivod had pointed out and info from Discostu and Gra The Ruler and did it in about half an hour.

The only thing I needed that I didn't have was an extra set of bearings as there isn't enough in one race to fill up the bearing cup once you take them out of the race... I probably need 2/3 more bearings in each cup but once it bedded in and I re-tightened it all it has been sweet.

Having nice fat fork dropouts and chunky forks is a plus with the obvious extra of a stem thats more dependable and doesn't come loose when I ride  :daumenhoch:

Thanks to all who helped with info and parts on this ( thanks to Dordy for some Haro forks and a headset  :daumenhoch: )







"Do not go gentle into that good night,
Old age should burn and rave at close of day;
Rage, rage against the dying of the light."

Dylan Thomas

WANTED : Victor DX 9/16 spindle or pedal

rad_pitt

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Re: 1 1/8th fork conversion on my 91 Sport
« Reply #1 on: January 12, 2012, 10:37 PM »
Nicely modded Ed  :4_17_5: bummer that you sold the 94 though - that was a beaut  :smitten:

Offline ED209

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Re: 1 1/8th fork conversion on my 91 Sport
« Reply #2 on: January 12, 2012, 11:03 PM »
Nicely modded Ed  :4_17_5: bummer that you sold the 94 though - that was a beaut  :smitten:

not sold yet  :) look through the spokes on that last pic  8) its going on the bay tomorrow night.

I'M a onebikebowy  :4_17_5:
"Do not go gentle into that good night,
Old age should burn and rave at close of day;
Rage, rage against the dying of the light."

Dylan Thomas

WANTED : Victor DX 9/16 spindle or pedal

Offline dordymush

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Re: 1 1/8th fork conversion on my 91 Sport
« Reply #3 on: January 12, 2012, 11:05 PM »
lookin posh that ed.
start of a new trend in the BR i can see this becoming.
spen will be next lol.
dave the bmxing gypo


rad_pitt

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Re: 1 1/8th fork conversion on my 91 Sport
« Reply #4 on: January 12, 2012, 11:08 PM »
Nicely modded Ed  :4_17_5: bummer that you sold the 94 though - that was a beaut  :smitten:

not sold yet  :) look through the spokes on that last pic  8) its going on the bay tomorrow night.

I'M a onebikebowy  :4_17_5:

I read that at 'I'm obi-wan kenobi'  :LolLolLolLol:

Don't know how I missed it in those pics mate! It'll make someone a nice ride for sure  :daumenhoch:


Offline ED209

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Re: 1 1/8th fork conversion on my 91 Sport
« Reply #5 on: January 12, 2012, 11:15 PM »
Nicely modded Ed  :4_17_5: bummer that you sold the 94 though - that was a beaut  :smitten:

not sold yet  :) look through the spokes on that last pic  8) its going on the bay tomorrow night.

I'M a onebikebowy  :4_17_5:

I read that at 'I'm obi-wan kenobi'  :LolLolLolLol:

Don't know how I missed it in those pics mate! It'll make someone a nice ride for sure  :daumenhoch:



I've just been in a mess with 2 bikes  :crazy2: always feel bad having one sat there... and the 91 is my  :smitten: :smitten:

the 94 just needs a seat, front brake blocks & a freewheel  :)




it was nice 'grey'd out though  8)

« Last Edit: January 12, 2012, 11:19 PM by ED209ยบ »
"Do not go gentle into that good night,
Old age should burn and rave at close of day;
Rage, rage against the dying of the light."

Dylan Thomas

WANTED : Victor DX 9/16 spindle or pedal

Offline Spen69

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Re: 1 1/8th fork conversion on my 91 Sport
« Reply #6 on: January 13, 2012, 01:02 AM »
start of a new trend in the BR i can see this becoming.
spen will be next lol.

Who? :angel:

Yep, I'll be all over this when I get some decent 1-1/8" forks :coolsmiley:
Still limping......

lk_97

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Re: 1 1/8th fork conversion on my 91 Sport
« Reply #7 on: January 13, 2012, 06:56 AM »
Nicely modded Ed  :4_17_5: bummer that you sold the 94 though - that was a beaut  :smitten:

not sold yet  :) look through the spokes on that last pic  8) its going on the bay tomorrow night.

I'M a onebikebowy  :4_17_5:

I read that at 'I'm obi-wan kenobi'  :LolLolLolLol:

Don't know how I missed it in those pics mate! It'll make someone a nice ride for sure  :daumenhoch:



I've just been in a mess with 2 bikes  :crazy2: always feel bad having one sat there... and the 91 is my  :smitten: :smitten:

the 94 just needs a seat, front brake blocks & a freewheel  :)




it was nice 'grey'd out though  8)



I've got a pink and grey leading edge seat that would look good on that 8)

Offline QUADROPHENIA

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Re: 1 1/8th fork conversion on my 91 Sport
« Reply #8 on: January 13, 2012, 07:40 AM »
Why fooking bother, just bin it and get a bmx

Offline pickle

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Re: 1 1/8th fork conversion on my 91 Sport
« Reply #9 on: January 13, 2012, 07:45 AM »
 :LolLolLolLol:

Offline ED209

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Re: 1 1/8th fork conversion on my 91 Sport
« Reply #10 on: January 13, 2012, 09:12 AM »
Why fooking bother, just bin it and get a bmx

you could have said before I started  >:( fookin hell.

Where can I get a BMX from Pete?
"Do not go gentle into that good night,
Old age should burn and rave at close of day;
Rage, rage against the dying of the light."

Dylan Thomas

WANTED : Victor DX 9/16 spindle or pedal

Offline Discostu

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Re: 1 1/8th fork conversion on my 91 Sport
« Reply #11 on: January 13, 2012, 09:11 PM »
Well done ed. you have done a nice tidy job of that conversion. Did you use beartrap cups?  And mix and match spare headset bearings until you got a set to fit?  You will find it will come a little loose once the bearings have bedded in after a couple of rides.  But you just adjust it up again. And then it stays Nice and tight without loosing again :daumenhoch:  defiantly a good mod to do if you want to make your old ride into a usable rider. The only problem is finding suitable forks and stem. Which you have done.  :)

theRuler

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Re: 1 1/8th fork conversion on my 91 Sport
« Reply #12 on: January 14, 2012, 12:47 AM »
The only problem is finding suitable forks and stem. Which you have done.  :)

Any 1.1/8" forks and stem will do.
You need regular 1" unsealed cups (of no particular type), couple of races of bearings, the 1.1/8 bottom ringy thing that goes on the forks and the top hardware from 1.1/8"
Plenty of grease, and loose ball it, simple.

Watch out for mystery tight spots though ;)  If you get one try removing a ball top and bottom.

A good advantage of this conversion is that you can run forks with lugs for a decent front brake.  And you get to pick from a wide range of forks.

Offline Discostu

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Re: 1 1/8th fork conversion on my 91 Sport
« Reply #13 on: January 14, 2012, 09:03 AM »
What I ment about using the right type of fork and stem was to fit a set that go well with the 1" frame your using. Some of the 80's frames had really small tubing and to stick a chunky 1"1/8th fork and stem combo makes it look wrong. For me the aim is to do the conversion in a way that it looks like the bike was built that way not converted. I also didn't use the loose ball bearing method as I managed to find some cage bearings that fitted my beartrap cups. So I haven't experienced any tight spots. I know loose bearings do work well. But you have to leave a gap almost a bearing wide for them to run free. I would imagine the next stage of modding would be to have cups made that will accept the new 1"1/8th inter grated cartridge bearing type headset. If I convert any more rides I might go in this direction to see if it will work. It won't be for a while though as all my current builds are going to be era correct give or take a couple of years.  :daumenhoch:

Offline Robbo

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Re: 1 1/8th fork conversion on my 91 Sport
« Reply #14 on: January 14, 2012, 03:27 PM »
Nice mod Ed, now take those awful old man grey tyres off and put the nice black ones back on.  :-* :LolLolLolLol:

Offline ED209

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Re: 1 1/8th fork conversion on my 91 Sport
« Reply #15 on: January 15, 2012, 03:48 AM »
Nice mod Ed, now take those awful old man grey tyres off and put the nice black ones back on.  :-* :LolLolLolLol:

good advice - will do it tomorrow... now stop being a ponce and get some nice white grips on ya Sport darling  :daumenhoch:
"Do not go gentle into that good night,
Old age should burn and rave at close of day;
Rage, rage against the dying of the light."

Dylan Thomas

WANTED : Victor DX 9/16 spindle or pedal

RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  1 1/8th fork conversion on my 91 Sport
 

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