Trying to arrive at a "most likely" cause for this

openair

Member
On a surface street, fairly low speed (coming up from a hill climb where I needed a little throttle, but I’m level at this point and slowing down and now just applying brake to reduce momentum), I'm slowing down as I’m approaching the stop sign, no significant curve to the section of road I’m on, bike is upright and on a more or less straight trajectory. The whole thing is pretty standard. Suddenly feel a serious jolt on the bars, maybe feels almost like an impact but there is nothing on the road to impact, next thing I know, I’m looking at the left side of the bike as I’m going down.

When I went down, I impacted the road directly on my left shoulder. No sign of head impact on helmet (I was conscious to keep my head tilted up and let my shoulder take the hit). Bike went down on its left side. Damage so far seems to be bent shifter, broken tank badge, handlebar feeling a little out of place. Another rider rode it back and said the bike was fine except for the weird feeling of the bar being slightly out of position on the left.

The road was not smoothly paved, more of a rough paving job that had seen better days and probably had some of those tiny loose pavement pebbles on it. The area had trees, and another rider asked me if I came upon some leaves. I don’t recall spotting any leaves or anything else when scanning ahead. The bike was in solid shape while riding. The only thing about the bike itself that I am aware could be a factor was that I recently had opened up one of the front calipers and re-inserted the pads and re-applied grease (after heli-coiling a stripped thread on the caliper itself). I had noticed that my front brakes were a little more grabby afterwards, but I didn’t deem them dangerously abrupt, and I had already ridden safely for hours on them. I was nonetheless thinking they needed to be smoothed out at some point.

Trying to logically arrive at a “most likely” cause for what happened here. Any insights based on your more experienced riding careers? The jolt on the bars seems to be the biggest clue I’ve got to go on.
 
Last edited:

PorradaVFR

The Temptations of Christ
Which side caliper had you worked on?

edit: and were you able to roll the bike afterwards? How did you get home (did you notice any “grabbiness” after the incident?)
 

openair

Member
I worked on the front right caliper. I was unable to do anything with the bike myself after the fall (broken shoulder), but another rider moved it off the road and rode it back to my house about an hour afterwards. He's the only one who has ridden it since, and he gave me his assessment. He didn't say anything about the brakes. He thought the bike generally rode fine, except for the now wonky handlebars.
 

packnrat

Well-known member
check the brakes first.
second something was on the pavement.
hows your tires? good tread? worn out? low? psi?
just a bit too much brake + one little "no-see-em" and down you can go.
 

RV6John

Active member
Bummer.

From your description, it sounds like the front lost traction and washed out under braking. The bars will turn and the suspension unload when the front washes out. Maybe this is what you felt?

Possible causes? Loose gravel, a slippery spot in the pavement (car A/C water or oil), leafs, etc?
 

Maddevill

KNGKAW
I agree, check the brakes and tire pressure. I went down under some eucalyptus trees once. The sap was like ice in the fog...
 

davidmc

Moto Traveler
Bummer.

From your description, it sounds like the front lost traction and washed out under braking. The bars will turn and the suspension unload when the front washes out. Maybe this is what you felt?

Possible causes? Loose gravel, a slippery spot in the pavement (car A/C water or oil), leafs, etc?

That's what I was going to say also. The pavement just before a stop sign can be very slick. And if you have any weight from your hands leaning on the bars while braking and your front wheel locks you have a high chance of washing out. I've had this happen to me more than once unfortunately.

Hope you are ok. An impact to the ground shoulder first often results in a broken collarbone, hope you avoided that. Again I speak from experience on the collarbone. :(
 

openair

Member
Much appreciated, everyone!

It sounds like the general consensus is that something of some kind was on the road (leaves, water, oil, gravel, etc) and that the front tire lost traction. Based on what RV6John said, in this scenario, the bars are likely to turn and the suspension unload, which could account for the jolt I felt.

The prescriptions are:

1) Check the brakes
2) Check the tires (@packnrat: I had checked the tread and PSI, but I checked the PSI hot, which could have given me an off reading)

As far as reducing the likelihood of this in the future, are there any extra measures I can take? Bike mods, riding technique, etc? The thing that is most concerning about this one to me is that I wasn't being irresponsible or risky with my riding when this happened. I was scanning the road ahead and wasn't punching it or anything. So I'm grasping for what I can do to mitigate in future.

@davidmc: I was fortunate on the collarbone. The shoulder was apparently broken pretty bad and needed surgery to get everything set back into place. I had on a jacket with shoulder armor, so that might have saved me the collarbone break by reducing the impact force, not sure. Sounds like the broken collarbone is a not-so-fun experience! Sorry to hear you had to deal with that.
 

Lazerus

Pissant squid
Be conscious of how you operate the front brake, try to gradually build up and gradually release brake pressure in non emergencies. It affords you the chance of feeling minor losses in traction without overstepping the threshold by such a great margin that you suddenly crash. Work on getting in tune with the bike, what it needs from you as a rider based on what it's "telling" you. Riding dirt can help with this.

Glad you're mostly ok, hope this helps :thumbup
 

Brokenlink

Banned
I'm curious why you tried to save the helmet at the expense of your shoulder? I'd be doing the exact opposite. I can replace the helmet. I suppose I can also replace the shoulder but it would cost more.
 

openair

Member
I'm curious why you tried to save the helmet at the expense of your shoulder? I'd be doing the exact opposite. I can replace the helmet. I suppose I can also replace the shoulder but it would cost more.
Definitely expensive to fix the shoulder. :) But my assumption was that a head impact could potentially lead to far more severe consequences.
 
Top