fuel tank vent

[rbig1]

ok I started to put the first gen back together. @cowpuc When you had problems with tank vent could you blow any air through restrictor. I can blow through mine but you cant feel air just hear some. Was surprised to see dust sitting on top of it. Did the plugged one make bike so it wouldn't rev? Or not run at all. I was surprised that the battery charger is working. Battery been dead for two years. I found a wire shield melted no wire in it and could not find a bad wire or new one. Was by the headlamp adjuster.

Edited September 12, 2016 by rbig1

[rbig1]

https://www.youtube.com/watch?v=rbb1o8i8w3o first start don't have throttle cables set correct. Sounds good forgot how quiet it is. now to adjust then put all the plastic back on. Then??????? What to do..... I guess move to patio.

[cowpuc]

Heyyyy - Hi Rodney!!!

When I have had problems with that backflow preventer thingy it plugged right off - stuck shut so I could not blow air thru it at all and the bike would only run till the tank pulled enough vacuum that it couldnt flow fuel - then it shut off completely.. I just stuck a piece of ink pen in where the valve was and rode it like that trusting I would be there if the bike ever tipped over and started to leak fuel out of the vent...

I suppose it would be possible for it to become partially open and create enough vacuum to prevent flow the fill rate to the pump down enough to starve the carbs.. If I were you I would just spice the line - try it without the restrictor - take the cap off and double check the vent hose to be sure it was good and clear and see what it runs like - those tank vents can cause all kinds of issues!!

By the way - let cha in on another little tidbit of info.. If you have a fuel pump failure on these 1st Gens and you carry a piece of gas line in your Maintenance Department you can splice the line above the restrictor - blow into the line and maintain enough pressure on the fuel in the tank with your lungs that the bike will run just fine.. It only takes a couple pounds of pressure to keep things working!!! This works AWESOME if you happen to have one of your kids with you out in the middle of nowhere.. Impresses the daylights out of them thinking their Dad is a miracle worker cause they didnt have to walk AND it gives em something to do while they are sitting on the back of the scoot :checkeredflag::checkeredflag: By the way,, if you try that and the kids forgets to breath out instead of in and gets a mouth full of fuel - you didnt hear this from me brother!!!