Carb vent tubes

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Dekon
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Carb vent tubes

Post by Dekon »

Will there be a problem if my carb vent tubes are of a smaller inside diameter? I replaced mine with some RC fuel line and it is smaller than the stock vent hoses.
Roadhazardguy
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Re: Carb vent tubes

Post by Roadhazardguy »

Is the id of the hose smaller than that of the brass tubes it is connected to?
Tony
1988 KDX 200
1980 KD 80
1989 ATK 406
1984 RM 500
1980 KZ 1300
2008 SM450R
Dekon
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Re: Carb vent tubes

Post by Dekon »

They are slightly smaller.
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diymirage
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Re: Carb vent tubes

Post by diymirage »

while we are on the subject, i have a small issue where the bike tends to leak fuel when it is on the kick stand
now, it does this intermittendly AND i dont want to change the float level because i run it high on the revs for longer periods of time

so i was wondering if i could run the overflow tube higher up so it only drips out when the bike os on its side

(sorry for the threadjack but it seemed to match close enough)
newbbewb wrote:DIYmirage has it right.


-1996 KDX 200 woods weapon (converted to 99 green body)
-1996 KDX 200 plated street toy (barney edition)
-2003 Yamaha TTR125-L (wifeys bike)
-1997 KDX 220 project bike
Dekon
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Re: Carb vent tubes

Post by Dekon »

I would think routing it up higher would not be a problem. They sell kits to move the vent tubes into the airbox.
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diymirage
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Re: Carb vent tubes

Post by diymirage »

ive heard that is a good mod in case you cross a lot of standing water
always figured it was just for the vent tubes though, would you run the overflow into the airbox aswell ?
newbbewb wrote:DIYmirage has it right.


-1996 KDX 200 woods weapon (converted to 99 green body)
-1996 KDX 200 plated street toy (barney edition)
-2003 Yamaha TTR125-L (wifeys bike)
-1997 KDX 220 project bike
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rbates9
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Carb vent tubes

Post by rbates9 »

If you think about it for a second,...... I can wait.............. The higher you run the over flow tube then the higher the fuel needs to be to get out. If you come out of the bowl and go up, say the 4 or 5 inches to the air box then before the over flow could have a chance of working then the fuel would already be well past the carb and filling the bottom end with gas...... So Yeah sure it will work great! Don't bother shutting the gas off when you park the bike. That is way too much work.
Roadhazardguy
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Re: Carb vent tubes

Post by Roadhazardguy »

If it does it intermittently then I would check to see if the float is hanging up on anything or bent and rubbing the bowl or something like that. My little 80 does that sometimes and tapping on the carb stops it but until I find a replacement carb it does just fine.
Tony
1988 KDX 200
1980 KD 80
1989 ATK 406
1984 RM 500
1980 KZ 1300
2008 SM450R
tommyd
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Carb vent tubes

Post by tommyd »

Mine does it too and I've adjusted the float and cleaned the carb several times...

I just ordered a new float needle. Hopefully that will fix it because I do long rides and need all the fuel range I can get.
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