Unofficial Royal Enfield Community Forum

Royal Enfield Motorcycles => Bullet with the UCE engine => Topic started by: emskee on August 16, 2010, 04:51:40 pm

Title: High Speed Wobble of C5: My Fix
Post by: emskee on August 16, 2010, 04:51:40 pm
I'm on my second C5 (traded the '09 on a '10).

Both had severe wobble over 55 mph when subjected to impulses like cross wind gust, bump in road, shake of bars, etc.

But only if I'm sitting all sloppy and loose.

If I grip the grips and squeeze the tank, no wobble.  And I don't mean death grip and "contraceptive" leg squeeze, I just mean handshake grip, some knee pressure.  Like how you SHOULD be attached to a little bike while going that fast.

I'm 5' 8". 195 lbs (kinda top heavy:  powerlifter) and I carry my gear around in an ALICE pack giving me an even higher center of gravity which exacerbates wobble.  If I ain't hanging on.

Suggest everyone do squats, benches, rows, chins, deadlifts, pushups, whatever for a few weeks.  Then get back on, hang on and ride.

The preceding are the opinions of the author.  Your (lack of) wobble may vary.  Ride responsibly and remember to brush and floss regularly.

Later,

Mike



Title: Re: High Speed Wobble of C5: My Fix
Post by: singhg5 on August 16, 2010, 05:08:45 pm
Just of curiosity - what prompted you to change from 2009 C5 to 2010 model ? Are there any differences ?
Title: Re: High Speed Wobble of C5: My Fix
Post by: ScooterBob on August 16, 2010, 06:01:48 pm
Here is an interesting link describing motorcycle chassis oscillation. Note that EVERY motorcycle has a resonant chassic frequency!

http://www.vf750fd.com/blurbs/vibmode.html
Title: Re: High Speed Wobble of C5: My Fix
Post by: emskee on August 16, 2010, 06:07:54 pm


The '09 was getting kind of dirty.  And getting up in miles. :)

The '09 and '10 are pretty much identical.  To include the wobble. 

'10:  Welds and paint look better.  Vibration a lot less.  Engine Control Unit more deterministic.

My '09 was a very early U.S. model.  Getting a '10 seemed like a good thing to do.  I do like it a lot more, which is a blast 'cuz I loved the '09.
Title: Re: High Speed Wobble of C5: My Fix
Post by: ScooterBob on August 16, 2010, 07:05:34 pm
Here is the proper way to to recover from a gentle high speed wobble. Note that the rider gets up out of the saddle and moves his weight to the front to settle the oscillation, then he shifts his weight to the right side to settle the resulting weave. He then pops back into the saddle and motors off happily!

http://www.youtube.com/watch?v=6Fa0GmdSN4A&NR=1
Title: Re: High Speed Wobble of C5: My Fix
Post by: r80rt on August 16, 2010, 07:07:42 pm
He's good, does it just the way I showed him! :D
Title: Re: High Speed Wobble of C5: My Fix
Post by: gashousegorilla on August 17, 2010, 03:56:10 am

Suggest everyone do squats, benches, rows, chins, deadlifts, pushups, whatever for a few weeks.  Then get back on, hang on and ride.

The preceding are the opinions of the author.  Your (lack of) wobble may vary.  Ride responsibly and remember to brush and floss regularly.

Later,

Mike




[/quote]
I may just try that Mike,if  the mechanical  s&%! don't work out. Can I still smoke though?
Title: Re: High Speed Wobble of C5: My Fix
Post by: qgolden on August 17, 2010, 04:27:03 am
If I grip the grips and squeeze the tank, no wobble.  And I don't mean death grip and "contraceptive" leg squeeze, I just mean handshake grip, some knee pressure.  Like how you SHOULD be attached to a little bike while going that fast


Like I said in my very first post on this forum,  I sold a Harley Road King and bought the C5, 

You ride on a Harley, you ride with a Royal Enfield.
Title: Re: High Speed Wobble of C5: My Fix
Post by: singhg5 on August 17, 2010, 04:31:09 am
Like I said in my very first post on this forum,  I sold a Harley Road King and bought the C5, 

You ride on a Harley, you ride with a Royal Enfield.

Quinn:

This is a great quote.  Love it !
Title: Re: High Speed Wobble of C5: My Fix
Post by: Ducati Scotty on August 17, 2010, 06:44:51 am
Suggest everyone do squats, benches, rows, chins, deadlifts, pushups, whatever for a few weeks.  Then get back on, hang on and ride.

People who sell stabilizers, CNC machined billet bling, and uber expensive suspension upgrades hate guys like you :D  Then again, many people dump $2000 into suspension goodies before they've even set the static sag properly on the stock stuff.  They usually don't set the sag right on the expensive stuff either but they swear it's better ::)

Scott
Title: Re: High Speed Wobble of C5: My Fix
Post by: ScooterBob on August 17, 2010, 11:44:12 am
He's good, does it just the way I showed him! :D

I wonder how long it took to get the smell out of the leathers ........ ? :D
Title: Re: High Speed Wobble of C5: My Fix
Post by: Vitalc on August 17, 2010, 03:45:01 pm
Quote
If I grip the grips and squeeze the tank, no wobble.  And I don't mean death grip and "contraceptive" leg squeeze, I just mean handshake grip, some knee pressure.  Like how you SHOULD be attached to a little bike while going that fast

Last perfect sunday, connecting 2 great collection of curves with a stretch of highway, thumper on 60 mph, flapping Tshirt and jeans, one hand on the throttle, one on the hip, legs open for fresh air, glass of white wine on the tank  :o  relaxed and steady as a rock on a perfect sunny sunday...
...admittedly, on a G5   ;D ;D

Title: Re: High Speed Wobble of C5: My Fix
Post by: Ducati Scotty on August 17, 2010, 03:48:52 pm
...admittedly, on a G5   ;D ;D

Now you just bein' mean :(
Title: Re: High Speed Wobble of C5: My Fix
Post by: ScooterBob on August 17, 2010, 04:07:21 pm
Last perfect sunday, connecting 2 great collection of curves with a stretch of highway, thumper on 60 mph, flapping Tshirt and jeans, one hand on the throttle, one on the hip, legs open for fresh air, glass of white wine on the tank  :o  relaxed and steady as a rock on a perfect sunny sunday...
...admittedly, on a G5   ;D ;D



Somehow .... oddly ....... I BELIEVE that!!
Title: Re: High Speed Wobble of C5: My Fix
Post by: emskee on August 17, 2010, 06:21:22 pm

I may just try that Mike,if  the mechanical  s&%! don't work out. Can I still smoke though?

I suppose, as long as you brush and floss regularly. ;D

Title: Re: High Speed Wobble of C5: My Fix
Post by: perri on August 18, 2010, 07:17:30 pm
check the spokes of the wheel, I had three broken spokes without knowing it.
c5 2009
Italy