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dmould66
01-04-2012, 05:56 AM
i just pulled a flash looking "QUAKE PROOF BIKE" out of a skip (dumpster) its got full suspension and realy heavy duty motorcycle style forks (true tripple tree) its just screaming to be fitted with a large hub motor. i stripped it back and gave it a nice coat of matt black, fixed some bits and peices then came up against something new-threadless forks! ive got the lower forks, a pressed steel top yoke and the stem, ive been looking around and found a handle bar mounting stem to fit but how do i keep the bearings tight? i think i needa sealed top bearing? will this maintain preasure on the bottom bearing (which seams to be a conventional type)? realy excitedabout this find i know its not the moste prestigious suspension bike but its got some lovely touches? anyone know anything about them?

Radical Brad
01-04-2012, 10:55 AM
The preload bolt pushed down on the hardware. You can see how here...

http://en.wikipedia.org/wiki/Headset_%28bicycle_part%29

Do not install a front hubmotor if this fork is aluminum. The dropouts WILL break off over time.

Brad

Odd Man Out
01-04-2012, 03:16 PM
don't ask him how he knows...

dmould66
01-04-2012, 11:25 PM
thanks for the link but im even more confused now-the picture showsa bolt boing down the centre into the "star nut"-problem is the steering tube on my forks protrudes through the hole (the pic shows a "top cap" here) and the bars clamp to this? i dont think its the same- any othersystems used? or ami being stupid?

savarin
01-05-2012, 11:28 AM
message 11 shows the handlebar stem clamped around the fork stem with the bolt that goes into the star washer clamping the it to the top of the handlebar stem.
http://forum.atomiczombie.com/showthread.php?3363-What-now!&highlight=#.TwW7qoGlOSo
In other words the fork stem does come out of the top of the frame, the cup is pressed into the frame, the bearings go in the cup, the cone goes down on top then all the other bits and pieces of the threadless setup.
There should be a selection of spacers to make up the gap so the top bolt and washer/round bit can press down on the spacer stack thus pulling the threadless stem up, then the handlebar stem is clamped tight around the fork stem.
Message 25 page two shows the clamp in place of the handlebar stem,
Message 28 shows a sort of close up all installed, you can just make out the bolt, black thrust washer, 2 spacer rings then the clamp.
HTH

dmould66
01-06-2012, 02:30 AM
cheers-i think i finaly got it- ordered a clamp and a head set will have a go at making the rest of the over bits-thanks

redrkt
06-02-2012, 03:45 PM
cheers-i think i finaly got it- ordered a clamp and a head set will have a go at making the rest of the over bits-thanks

Here is what you should see inside the top of the headstem

http://www.redrktracing.com/schwinn_bike_project/1280/mbp_bike_1_new_stem_3.JPG


Ken