Technical & Reference Section > Tech and Restoration

1 1/8th fork conversion on my 91 Sport

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ED209:

--- Quote from: QUADROPHENIA on January 13, 2012, 07:40 AM ---Why fooking bother, just bin it and get a bmx

--- End quote ---

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

Where can I get a BMX from Pete?

Discostu:
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:

--- Quote from: discostu on January 13, 2012, 09:11 PM ---The only problem is finding suitable forks and stem. Which you have done.  :)

--- End quote ---

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.

Discostu:
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:

Robbo:
Nice mod Ed, now take those awful old man grey tyres off and put the nice black ones back on.  :-* :LolLolLolLol:

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