12-08-12, 09:21 PM
Trying to remember when i done them, so if i'm wrong here then let me know, but i think the race is a ring sitting inside a cylindrical cut out at the headstock?
So if i remember rightly, you'll need a narrow enough drift to go up through the underside of the headstock. Bear in mind the business end of the drift should have a right angled edge because theres very little of the race protruding out.
I had no real issues getting the old one out aside from my drift being a bit rounded but its gonna be fiddly
Cheap blowtorch from DIY shop and LIGHTLY heat the outside of the headstock around where the race is seated and the area above. Just a bit at first, don't go mental. Take the heat off and go up and under and lightly tap one side of the race with a couople of wee dinks, then do the same at the opposite side. It should gradually make its way out if you repeat that process.
You shouldn't have to make it too hot. It is an interference fit but it won't need Thor wiedling teh hammer. Heat, tap/tap----tap/tap. and so on.
For the new one, stick the race on the freezer for an hour or so before you go to fit it, it will contract the metal. This too should be inserted with light taps (MATRON!!!!) at either side.
Or am i thinking of a completely different set up and bike?
So if i remember rightly, you'll need a narrow enough drift to go up through the underside of the headstock. Bear in mind the business end of the drift should have a right angled edge because theres very little of the race protruding out.
I had no real issues getting the old one out aside from my drift being a bit rounded but its gonna be fiddly
Cheap blowtorch from DIY shop and LIGHTLY heat the outside of the headstock around where the race is seated and the area above. Just a bit at first, don't go mental. Take the heat off and go up and under and lightly tap one side of the race with a couople of wee dinks, then do the same at the opposite side. It should gradually make its way out if you repeat that process.
You shouldn't have to make it too hot. It is an interference fit but it won't need Thor wiedling teh hammer. Heat, tap/tap----tap/tap. and so on.
For the new one, stick the race on the freezer for an hour or so before you go to fit it, it will contract the metal. This too should be inserted with light taps (MATRON!!!!) at either side.
Or am i thinking of a completely different set up and bike?
Smell ones mother. Yaas!