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- Path: sparky!uunet!gossip.pyramid.com!pyramid!infmx!infmx!arturo
- From: arturo@informix.com (Arturo Vega)
- Newsgroups: rec.motorcycles
- Subject: Whole lotta shakin' ...
- Keywords: AAAAAAAAAAAAAAAAARRRRRRGGGGHHH!!
- Message-ID: <arturo.728013241@infmx>
- Date: 26 Jan 93 01:54:01 GMT
- Sender: news@informix.com (Usenet News)
- Organization: Informix Software, Inc.
- Lines: 47
-
-
- So this past Sunday I'm on my way home after a brief jaunt in the
- hills. I'm on the freeway, somewhere in the vicinity of 70^H^H55 mph,
- on a gentle rain-grooved curve. Suddenly, the front wheel begins to
- oscillate rather violently. It wasn't quite a tank-slapper, but it
- was way, way more than just a weave. I eased off the throttle, but
- this didn't seem to help; then I noticed that my arc was widening &
- I was getting close to the guardrail. I firmly leaned the bike over
- some more; this seemed to do the trick, although I had also lost about
- 15mph by this time, which may have helped.
-
- This is the second time this has happened to me (not on the same
- machine), and I enjoyed it as little now as I did the first time--
- I was still talking to myself after I reached home =8-O
-
- With the bike on the centerstand and someone on the passenger seat,
- I tried to move the front axle horizontally back and forth, but could
- feel no play; nor could I detect any notchiness while moving the
- handlebars from side to side. I noticed a small nick on one fork
- tube after I realized the tube had a light coating of oil & a little
- "mud" near the top of the fork's travel. Since I recently replaced
- the fork seal, it seems to me that the nick may have damaged the new
- seal.
-
- So, a few questions to the omniscient net:
-
- 1. What's the best reaction to this wobble? Unfortunately, my bike,
- a cm400, cannot elevate its front wheel at that speed, so that's
- not an option :-( Basically all I did was slow down gradually and
- maintain a *very* firm hand on the controls.
-
- 2. What might be the possible causes? Is it possible that asymmetrical
- fluid levels in the fork tubes could lead to this behavior? Over
- the course of the past few rides I had observed that at these speeds,
- the bike would require longer intervals to settle after being
- perturbed by road irregularities. At lower speeds I've noticed
- nothing amiss.
-
- 3. Will I need to replace the fork tube to avoid chewing up new
- fork seals as fast as I can replace them?
-
- Any and all possible leads would be much appreciated.
-
- Later,
-
- Art "Cheap thrills"
- arturo@informix.com
-