cordodor
Full Member
'79 SR500
Posts: 109
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Post by cordodor on Aug 10, 2007 15:08:40 GMT -5
I rode my bike to work today and then home for lunch. After sitting for about an hour, I went out to my garage to a potent fuel smell. My '79 bike was sitting over a puddle of fuel. I left the petcock turned on like normal and it appeared that the hose from the carburettor was just dripping at a crazy rate. I dont know much about the mechanics of this carburettor or any for that matter. Except for a little DT175, all my vehicles have been FI. What is that drain hose for and why would the carburettor keep pulling fuel from the tank? Could my throttle have kept on, flooded it and it just overflowed? Also, my handlebars were turned left. When the engine is running, I get more throttle when the bars are turned left. apparently, it manipulates the throttle cable enough to pull it some. When i first got the bike, i tried stuffing the throttle cable under the tank which DID NOT work. I started the bike and it just sat and revved at like 5K RPM till I shut it off and figured it out. Any ideas on any of this stuff? TIA for the help.
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Post by davedunsboro on Aug 10, 2007 18:05:10 GMT -5
Sounds like a classic case of jammed needle/seat to me ! Just try tapping the base of the carby with the hammer handle it may stop , if not you may need to strip & replace the offending item cheers Dave.
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Post by Bize on Aug 10, 2007 20:29:50 GMT -5
What is that drain hose for Carbs will have a hose on them that will have fuel come out of them if the float bowl over fills, but its purpose is to vent to atmosphere, so vaccum is not created when fuel is drawn up the jets. When the engine is running, I get more throttle when the bars are turned left. apparently, it manipulates the throttle cable enough to pull it some. To solve this problem, you need to adjust the cable freeplay. Give it more freeplay until it doesn't do it anymore. When your checking freeplay; check it with the 'bars on left full lock and right full lock.
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cordodor
Full Member
'79 SR500
Posts: 109
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Post by cordodor on Aug 11, 2007 0:57:40 GMT -5
is that free play adjusted from the carburetor side or the twist grip side?
Thanks for the tips.
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Post by Bize on Aug 11, 2007 1:06:25 GMT -5
Start with the lever side as you probably only need to make a small adjustment.
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