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Is my head tube oval?
Hi all, I have a Norco bush pilot that I use(d) for off road use. I now use it as a winter commuter bike. I have noticed that my steering has a notch in the strait position. It uses a threaded system for the stem and fork connection. I am just wondering if I oval-ised my head tube or I just need a new head set? How do you see if the head tube is oval-ised? Thank you very much Pete -- big Pete |
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#2
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Is my head tube oval?
On Dec 21, 7:53*am, big Pete big.Pete.31y...@no-
mx.forums.cyclingforums.com wrote: Hi all, I have a Norco bush pilot that I use(d) for off road use. I now use it as a winter commuter bike. I have noticed that my steering has a notch in the strait position. It uses a threaded system for the stem and fork connection. I am just wondering if I oval-ised my head tube or I just need a new head set? How do you see if the head tube is oval-ised? Thank you very much Pete -- big Pete I highly doubt that you ovalised it, since that's usually caused by a loose headset, which wouldn't have the notch. You might not even need a new headset. If you rebuild it with loose balls instead of retainers, the balls won't line up the same way as before and the indexing will be gone. Not that the indexing really hurts anything, anyway. |
#3
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Is my head tube oval?
On Sat, 22 Dec 2007 02:53:15 +1100, big Pete
may have said: Hi all, I have a Norco bush pilot that I use(d) for off road use. I now use it as a winter commuter bike. I have noticed that my steering has a notch in the strait position. It uses a threaded system for the stem and fork connection. I am just wondering if I oval-ised my head tube or I just need a new head set? How do you see if the head tube is oval-ised? The overt symptom of a wallowed head tube is steerer radial motion under load or, in bad cases, play in the cup where it goes into the frame. This is rare; it takes a hard hit to change the shape of the head tube, and you'll bend the fork first. The type of symptom you're seeing is almost always due to a worn headset. Take it apart and examine the cones; I'm betting that you'll find a pitted or corroded spot in one of them. -- My email address is antispammed; pull WEEDS if replying via e-mail. Typoes are not a bug, they're a feature. Words processed in a facility that contains nuts. |
#4
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Is my head tube oval?
big Pete wrote:
I have a Norco bush pilot that I use(d) for off road use. I now use it as a winter commuter bike. I have noticed that my steering has a notch in the strait position. It uses a threaded system for the stem and fork connection. I am just wondering if I oval-ised my head tube or I just need a new head set? How do you see if the head tube is oval-ised? all is revealed: http://draco.acs.uci.edu/rbfaq/FAQ/8f.13.html -- Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971 |
#5
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Is my head tube oval?
Hank Wirtz wrote:
You might not even need a new headset. If you rebuild it with loose balls instead of retainers, the balls won't line up the same way as before and the indexing will be gone. Not that the indexing really hurts anything, anyway. If that fails, I've also had luck with changing the size of bearings in one of the cups. I had a beater bike that had really bad indexed steering, so bad that it almost caused a crash a few times when riding off-road since I couldn't compensate for gravel and small rocks. I put smaller bearings in the bottom cup than the ones that it came with and it's now extremely smooth, such that you'd never suspect that anything was ever wrong with it. |
#6
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Is my head tube oval?
big Pete ? wrote:
Hi all, I have a Norco bush pilot that I use(d) for off road use. I now use it as a winter commuter bike. I have noticed that my steering has a notch in the strait position. It uses a threaded system for the stem and fork connection. I am just wondering if I oval-ised my head tube or I just need a new head set? How do you see if the head tube is oval-ised?... JB frets over this issue, while jb indents. -- Tom Sherman - Holstein-Friesland Bovinia POST FREE OR DIE! |
#7
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Is my head tube oval?
On Sat, 22 Dec 2007 22:28:04 -0600, Tom Sherman
may have said: big Pete ? wrote: Hi all, I have a Norco bush pilot that I use(d) for off road use. I now use it as a winter commuter bike. I have noticed that my steering has a notch in the strait position. It uses a threaded system for the stem and fork connection. I am just wondering if I oval-ised my head tube or I just need a new head set? How do you see if the head tube is oval-ised?... JB frets over this issue, while jb indents. You, sir, are having entirely too much fun flogging a certain bit of equine taxidermy. -- My email address is antispammed; pull WEEDS if replying via e-mail. Typoes are not a bug, they're a feature. Words processed in a facility that contains nuts. |
#8
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Is my head tube oval?
On Dec 21, 2:53*pm, A Muzi wrote:
big Pete wrote: I have a Norco bush pilot that I use(d) for off road use. I now use it as a winter commuter bike. I have noticed that my steering has a notch in the strait position. It uses a threaded system for the stem and fork connection. I am just wondering if I oval-ised my head tube or I just need a new head set? How do you see if the head tube is oval-ised? all is revealed:http://draco.acs.uci.edu/rbfaq/FAQ/8f.13.html -- Andrew Muziwww.yellowjersey.org Open every day since 1 April, 1971 ol JB sure can write can't he? |
#9
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Is my head tube oval?
That is a question you need to ask your wife, girlfriend or boyfriend,
depending on your preferences. |
#10
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Is my head tube oval?
problem can be elliptical wear at the crown race from lack of service or greasewash out in severe conditions. try repacking with new bearings and Castrol Marine Grease in a tube from Wal-grease is beige. The elliptical and non adjustable surfaces out torque the rebuild even using liberal quantities of red and blue locktite on a sanitary thread surface. A coula miles down the road and expletive deleted it's loose again. No, that's not clumsy you, the race is shot and you gotta get a new one. take it off after cleaning and PCBlaster with a propane torch smokin' and a machete (Wal) tapped with a hardwood block offa skid. ovalization? if the cups fell out? cups don't fall out, gotta punchem out. I have a tool looks like a vitamin pill stretches acroos the cup edges and tap tap out eases the cup. But the easier the cup comes out, the more probable ovalization. paint it or linseed the inside pipe before sticking the cups back in. inspect for rust. if ovalized, Locktite has slipfit liquids for solving the refit but a clean surface is a good idea. Farmall hardware has a circular brush to fit. |
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