1987 cbr100f shutdown
#1
04-27-2009, 07:18 AM
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1987 cbr100f shutdown
Left a fuel stop and just reached top gear at about 70 mph . Engine stuttered and shut down . Had just completed 200 miles of a 250 mile ride . Engine cranks , no nasty sounds to indicate that it exploded. Bike has 32,000km on the clock and ran fine for abour 1500 miles so far this spring . Seems electrical . Anyone have an idea where to start to find the problem ? Coil ?
#2
04-27-2009, 07:39 AM
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Giday Eddy
I moved your thread here to get the attention of the 1000F guys
have a browse through here to check some of the many threads on electrical issues ...
Start with this one mate ...
https://cbrforum.com/forum/showthrea...ght=electrical
I am sure some of the guys will drop by and reply as well...
I would start with the std stuff..
Fuses / check for spark at the plugs / check charge to the battery /
I moved your thread here to get the attention of the 1000F guys
have a browse through here to check some of the many threads on electrical issues ...
Start with this one mate ...
https://cbrforum.com/forum/showthrea...ght=electrical
I am sure some of the guys will drop by and reply as well...
I would start with the std stuff..
Fuses / check for spark at the plugs / check charge to the battery /
#3
04-27-2009, 07:59 AM
#4
04-28-2009, 05:20 AM
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hey eddy,
we had a problem here where a petrol station somehow got water in one of there storage tanks, a dozen cars and a handfull of towed bikes later got them thinking something was wrong. fuel in the tank might not be the answer but something to look at if you dont 100% trust the supplyer or its not your usual fillup point.
we had a problem here where a petrol station somehow got water in one of there storage tanks, a dozen cars and a handfull of towed bikes later got them thinking something was wrong. fuel in the tank might not be the answer but something to look at if you dont 100% trust the supplyer or its not your usual fillup point.
#5
04-28-2009, 06:32 AM
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Water is nasty when it's in your fuel. It is heavier than the fuel & it's surface tension stops it passing through jets etc. Small amounts can be removed by adding methylated spirits (alcohol) to the fuel. Large amounts will require you to drain & clean the entire fuel system. Takes a while but not hard.
Your problem to me sounds more like water in the fuel but only you know exactly how the bike reacted. The stuttering could be as the fuel/water worked its way through the carbies. Pull the fuel line off before your filter & let some fuel drain out into a container & see if there is any water in it.
Also how low on fuel were you when you filled up the tank. Possibly water & rust build up in the tank just picked up from being on reserve or stirred up from the filling.
Hope this helps.
Your problem to me sounds more like water in the fuel but only you know exactly how the bike reacted. The stuttering could be as the fuel/water worked its way through the carbies. Pull the fuel line off before your filter & let some fuel drain out into a container & see if there is any water in it.
Also how low on fuel were you when you filled up the tank. Possibly water & rust build up in the tank just picked up from being on reserve or stirred up from the filling.
Hope this helps.
#6
04-28-2009, 08:43 PM
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it continues..
Thanks all . So ...the bike came home on a hook . 300k tow . Always Nice . Got a ride home myself . Of course , it started right up . Very Poor idle at first , sounded like not running on all cylinders . Decided to prop the tank up & start checking plugs . Restarted with the tank up and the old thing ran like a charm .
For now it seems to have fixed itself ...... what could possibly go wrong with that repair ??
till next time ,
Ed
For now it seems to have fixed itself ...... what could possibly go wrong with that repair ??
till next time ,
Ed
#7
04-28-2009, 09:57 PM
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Decided to prop the tank up & start checking plugs . Restarted with the tank up and the old thing ran like a charm .
For now it seems to have fixed itself ...... what could possibly go wrong with that repair ??
For now it seems to have fixed itself ...... what could possibly go wrong with that repair ??
I would be checking all the rubber hoses for kinks and or blockages ...
spooky things like this is what cost you a 300K tow ...
worth a bloody good look around before you go taking to the road
#8
04-28-2009, 11:48 PM
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Just died
My opinion (which is as important as a cricket fart) is you had a failure related to your fuel supply. As Steve said, it sounds like your gas tank ended up with a vacuum in it because your breather line did not allow air back into the tank as your gas was going out into the carbs.
If it happens again, turn the key off after you stop and put your ear near the gas tank cap. Open you gas tank cap and listen for the vacuum sound. If you have a CBR-F that has smog equipment on it, the vapor canister can get "flooded" from gas overfill or excessive fumes and make the bike stop after a shutter and shake. The vapor canister stops the tank from getting air into it to replace the gas that has been used. Also, check to make sure your small vacuum line to your petcock is not kinked or split. Your petcock is vacuum operated and without good vacuum, you will have hard starting and little or no fuel flow out of the tank.
I think Steve hit it on the head, breather (vent tube) problem.
If it happens again, turn the key off after you stop and put your ear near the gas tank cap. Open you gas tank cap and listen for the vacuum sound. If you have a CBR-F that has smog equipment on it, the vapor canister can get "flooded" from gas overfill or excessive fumes and make the bike stop after a shutter and shake. The vapor canister stops the tank from getting air into it to replace the gas that has been used. Also, check to make sure your small vacuum line to your petcock is not kinked or split. Your petcock is vacuum operated and without good vacuum, you will have hard starting and little or no fuel flow out of the tank.
I think Steve hit it on the head, breather (vent tube) problem.
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