Author Topic: My 1976 CB550F blew up. [with photos]  (Read 7285 times)

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Offline jorwesflow

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My 1976 CB550F blew up. [with photos]
« on: November 12, 2011, 06:01:47 PM »
It was a mild Tuesday afternoon in northern CT. We had just been pounded with the freak October 30th snowstorm, and we were still without power 5 days later. But the weather was plenty warm enough, and the streets were dry, save a little snowmelt runoff. My buddy Josh had just bought a '73 CB750, and we had never been riding together. So he met me at my house and we hit the road. About two miles away from my place, I came to a stop sign, and then proceeded to accelerate through the intersection until my eye caught a massive orange/yellow flame coming from under the gas tank. I was only at around 5-10mph at that point so I hit the brakes, flicked the kill switch, and hopped off the bike. Out of instinct, I momentarily attempted to put the bike on its stand, but that thought only lasted a nanosecond. The flames were nearly engulfing the front half of the bike at that point. Fortunately, the human instinct: "keep large flames away from body" trumped the instinct to not drop my motorcycle. So although it felt unnatural and somewhat painful to do, I threw the bike down away from my body and took some quick steps backward. As that left handgrip departed from my hand for the last time, the moments it took gravity to pull the bike to its fiery resting place on the pavement seemed freakishly long as the hours upon hours of hard work I spent flashed before my eyes. My buddy Josh, who was riding behind me, had pulled his bike over some 60 feet away when he saw the first flames. I cautiously walked backwards in his direction, not really able to look away as the flames grew at an exponential rate. A line of cars had come to a stop, and one person shouted out his window that he had already called 911. The only thing we could do at that point was stand and watch. I think I muttered a few "are you kidding me?"'s, which seemed to echo back and forth between Josh and I every 20 seconds or so. After about two minutes, I managed to gather myself and think to snap a few photos on my iPhone of this inflaming intersection exhibition. After about 6 or 7 minutes, the fire trucks showed up and within seconds had the 15'-20' high ball of fire reduced back down to a chunk of brownish/gray steaming metal. As I answered a few questions to paramedics and police officers and signed a few papers, Josh took his bike home to grab his car and come back. Within a matter of 25 minutes, I had been carelessly cruising down a country road with my good buddy, and now I sat on a guardrail next to the steaming remnants of my very first bike as I awaited his return in a sedan.

I still can only speculate as to what happened. I had ridden this bike all summer and it was running fairly great. My friend said he saw a flame shoot out the left side of the bike while I was still at the stop sign before I had even noticed it myself. The petcock is on that side of the tank, so maybe the fuel line came loose? But even if there was a steady stream of fuel flowing out from the petcock, what would have sparked it?

All I know, is that I'm grateful to God that I'm alive and not even slightly burned. The bike could have caught fire at 55mph, at which point (because of the wind) I may not have noticed until the contents of the tank (which was completely full by the way) combusted with me still on the motorcycle.

Thanks to everyone who helped me over the last year get this bike going. It was a good run while it lasted.

What it looked like when I first bought it. No side covers, wrong tank color, really messed up electrical issues, for starters...


After a year of learning and work


late summer 2011 (the lame faux-hip look on my face was intended)


Are you kidding me?



Carbs straight up melted.


Farewell.
« Last Edit: November 12, 2011, 06:27:45 PM by jorwesflow »
1977 CB550K

Offline FuZZie

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Re: My 1976 CB550F blew up. [with photos]
« Reply #1 on: November 12, 2011, 06:08:53 PM »
That really sucks, but you did the right thing in getting away from it imagine if that gas had got on you too.

Offline dhall57

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Re: My 1976 CB550F blew up. [with photos]
« Reply #2 on: November 12, 2011, 06:12:22 PM »
Your very very lucky. You can get another bike, but you can't get another you. Glad your ok.

dhall
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Offline Stev-o

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Re: My 1976 CB550F blew up. [with photos]
« Reply #3 on: November 12, 2011, 06:15:14 PM »
Unbelievable!  Wow, I feel for you, that as a great looking bike.  Guessing a fuel leak ignited somehow?
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline MoMo

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Re: My 1976 CB550F blew up. [with photos]
« Reply #4 on: November 12, 2011, 06:17:41 PM »
You are a very lucky man...Larry

Offline jorwesflow

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Re: My 1976 CB550F blew up. [with photos]
« Reply #5 on: November 12, 2011, 06:18:39 PM »
Unbelievable!  Wow, I feel for you, that as a great looking bike.  Guessing a fuel leak ignited somehow?
That's my only guess! No idea really... Freak stuff, man. freak stuff.
1977 CB550K

Offline Hush

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Re: My 1976 CB550F blew up. [with photos]
« Reply #6 on: November 12, 2011, 06:34:00 PM »
My sincere condolances on your loss mate! :'(
That is seriously a stink ending to a nice looking ride, glad you are OK.....Hush.
I think the thing I most like about motorcycling is the speed at which my brain must process information at to avoid the numb skulls who are eating pies, playing the ukulele, applying make-up etc in the comfort of their airconditioned armchairs as they make random attempts to kill me!!!!!!!

Offline sopo400f

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Re: My 1976 CB550F blew up. [with photos]
« Reply #7 on: November 12, 2011, 06:35:54 PM »
Sorry for your loss.
Strange that your tires didn't melt.
1975 cb400f blue

Offline scottly

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Re: My 1976 CB550F blew up. [with photos]
« Reply #8 on: November 12, 2011, 06:40:27 PM »
I'm going to have nightmares tonight... :(
Don't fix it if it ain't broke!
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Offline dave500

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Re: My 1976 CB550F blew up. [with photos]
« Reply #9 on: November 12, 2011, 06:41:53 PM »
man you must be devastated?those carb slides must be melt proof?

Offline jorwesflow

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Re: My 1976 CB550F blew up. [with photos]
« Reply #10 on: November 12, 2011, 06:42:22 PM »
Sorry for your loss.
Strange that your tires didn't melt.
they started to bubble up. the shadows hide it in the photo
1977 CB550K

Offline kpier883

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Re: My 1976 CB550F blew up. [with photos]
« Reply #11 on: November 12, 2011, 06:49:16 PM »
I can't figure that out either.  Has me worried.  I am really sorry for the loss, it was a great looking bike.  Love the headers. 
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Offline DavePhipps

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Re: My 1976 CB550F blew up. [with photos]
« Reply #12 on: November 12, 2011, 06:56:58 PM »
Are you going to try rebuilding or buy another and use this one as a parts bike? Call me nuts but I would try and rebuild, but then again I think I'm nuts sometimes.

How many members bikes have burnt now? Is this the second or are there more?
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Offline Bodi

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Re: My 1976 CB550F blew up. [with photos]
« Reply #13 on: November 12, 2011, 07:17:27 PM »
A friend had his van burn with his race bike (Jawa speedway racer) and a Honda Z50 pitbike in the back burn up on the way to a track. He smelled smoke while driving and stopped, then saw flames and got back a ways... he knew there was a lot of fuel (methanol for the race bike and gas for the pitbike) inside. The fire was pretty wild as he tells it, this was in an isolated area and no fire trucks came before it was s moking hulk. All that was left of either bike was the steel, the aluminum melted. So he just had the frames with a pile of gears etc in a blob of congealed aluminum underneath. The pictures were pretty amazing.

Offline jorwesflow

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Re: My 1976 CB550F blew up. [with photos]
« Reply #14 on: November 12, 2011, 07:17:39 PM »
Are you going to try rebuilding or buy another and use this one as a parts bike? Call me nuts but I would try and rebuild, but then again I think I'm nuts sometimes.
I don't think I want the trouble of either rebuilding or parting out what's undamaged. I don't have enough spare time to do either at this point. i'll take the claim check and move on.   :-\
1977 CB550K

Offline Stev-o

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Re: My 1976 CB550F blew up. [with photos]
« Reply #15 on: November 12, 2011, 07:44:33 PM »
Will you get another? This is pretty rare, hope it has not left a bitter taste in your mouth for Hondas.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline Frostyboy

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Re: My 1976 CB550F blew up. [with photos]
« Reply #16 on: November 12, 2011, 10:40:04 PM »
Really sorry to see those 'after' pics. I'm not sure how that would have started, however I think you just convinced me to hook up some hoses to the overflow tubes on mine.
Last year I joined a support group for procrastinators.
We haven't met yet.
[CB550F1]

Offline Retro Rocket

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Re: My 1976 CB550F blew up. [with photos]
« Reply #17 on: November 12, 2011, 10:42:23 PM »
Spikey's bike burnt to the ground and was rebuilt, use his for inspiration and try again...... Sorry about the bike....
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Offline CoachDoc

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Re: My 1976 CB550F blew up. [with photos]
« Reply #18 on: November 12, 2011, 11:28:36 PM »
Really sorry to see those 'after' pics. I'm not sure how that would have started, however I think you just convinced me to hook up some hoses to the overflow tubes on mine.
I had the same thought. If your float needles stick and the carbs overflow with no overflow tube in place, gas can flow directly onto hot metal parts.
I share your pain. It's really hard to see all your hard work go up in smoke.

Offline burnoutking1971

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Re: My 1976 CB550F blew up. [with photos]
« Reply #19 on: November 12, 2011, 11:29:11 PM »
Ouch, that is a real bummer! Glad you're ok. At least you can get another bike.
:)

Offline BeSeeingYou

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Re: My 1976 CB550F blew up. [with photos]
« Reply #20 on: November 12, 2011, 11:41:40 PM »
    I would be interested to know if you have any more insight into what caused this.  You mentioned it seemed to come from under the tank.  This is where coils and ignition wires are located so I would suspect an arcing ignition spark or some other electrical short causing a spark combined with a leaking petcock, fuel line, or pinhole leak in the tank. 
    If gas leaked from the carb it would usually fall on the crankcase and I don't see how that would be hot enough to ignite.  If that was possible we would see bikes burning up all the time. 
« Last Edit: November 13, 2011, 12:01:07 AM by srust58 »

Offline seanbarney41

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Re: My 1976 CB550F blew up. [with photos]
« Reply #21 on: November 12, 2011, 11:46:45 PM »
wow...reallly makes me think about all the rides I have had that ended with my boots full of gasoline...
If it works good, it looks good...

Offline BeSeeingYou

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Re: My 1976 CB550F blew up. [with photos]
« Reply #22 on: November 12, 2011, 11:56:05 PM »
wow...reallly makes me think about all the rides I have had that ended with my boots full of gasoline...

Makes me think back to 1981 and I was coming back from  Montana on my XS650.  There had been a recall on the petcock just before I left a month earlier on the trip.  Deal with it when I get back.  Well crossing a remote stretch of eastern Montana it starts to leak and I am sure I drove at least 100  miles or more to Lemmon, SD where I found  Yamaha dealer that fixed it for me.  Most nerve wracking ride ever. :o

Offline seanbarney41

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Re: My 1976 CB550F blew up. [with photos]
« Reply #23 on: November 13, 2011, 12:12:13 AM »
yeah...but hot metal will not ignite gasoline...it does require some sort of spark...
If it works good, it looks good...

Offline Hush

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Re: My 1976 CB550F blew up. [with photos]
« Reply #24 on: November 13, 2011, 01:06:29 AM »
My guess would be an arcing spark lead on spilled gas from leaking tap or pin hole in tank.
I think the thing I most like about motorcycling is the speed at which my brain must process information at to avoid the numb skulls who are eating pies, playing the ukulele, applying make-up etc in the comfort of their airconditioned armchairs as they make random attempts to kill me!!!!!!!