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Alleyoop,scoot,cyborg,jct842,Guitarman,tvnacman,Bashan ok.I agree with Bashan lets take it down a notch .when I said the flow was good after the fuel filter I meant when I disconnected the fuel line from the carb. side of the filter not the fuel tank side, the gas flow was fine.so the fuel is flowing from the tank down to the filter thou the filter but stops before filling the float bowl at the carb. now when I'm riding and the problem happens the filter is dry I've try'ed opening the gas cap that would brake a vacuum if there was one.(right) and I can see the bung at the bottom of the fuel tank no blockage.the only thing that works to get it going again is to blow on the vent hose or disconnect the fuel line at the fuel filter and when I do that the fuel flow is fine.now I know this sounds like a classic vent problem but opening the gas cap should brake the vacuum.It's like the needle at the float bowl is stuck and it needs a little pressure to open it and let the fuel in and fill the bowl.and blowing in the vent line gives it that little extra push. I've had the carb. off and cleaned it and adjusted the float level it seems fine.so just to put to rest the tank issue I'm going to rig up a temporary fuel tank out of a gas can and see what happens.also some one asked if the vent was still hooked up to a canister ,it is not, not even a filter till I fix this problem.now as not to get anyone mad at me if you need more info just ask me.and I'll do my best to explain myself.thank you all for your help. Scoot

Alleyoop You may be on to something here, it maybe just me but my fuel Gage doesn't seem to act the same as it has in the past .but I can put compressed air in the vent hose and hear it very well at the gas cap and I can see the outlet at the bottom of the fuel tank, no blockage I don't think it's the vent because I've ran it with the gas cap loose and it still does the same thing. today as I put the compressed air in the vent hose to check I watched for dabree in the tank but there was none.this really has me stumped.is there any thing as far as the adjustment or jetting to the carb, that would cause this problem? and just as a side note I finished my new stainless steel exhaust last week but I don't dare put it on till I fix this problem or I'll just be opening a can of worms.and not know what did what.thanks for your help.(got to find this gremlin)later Scoot.

cyborg Hey cyborg, are you taking about a manual petcock because I was thinking the same way just s%@# canning the vacuum set up but I'm not really sure that's my problem because I have eliminated the petcock and the problem is still there.and what about a non cv carb.I know you like mukuni carbs. do you know any that will work on a gy6?any help would be great.later  Scoot.

scoot,Bashan sorry, I mean the vacuum hose that runs from the T to the petcock. and yes I've ran it with the gas cap not in the lock position sill no go.let me go over the vacuum hoses one hose goes from the intake manifold to the T from the T one hose goes to the carb. the other goes to the petcock the one that goes to the petcock is the one that is blocked off now.hope that helps.

scoot,Alleyoop,jerryscript,cyborg,Bashan,rapidjim I just ordered the motion pro adjuster mainly because I'm a tool junky but just for fun I try'ed the wood screw tip from the video.work like a champ in the video the measurement was for 003. and 005. I like to set my valves at 004.so I just split the difference.after I was done I measured it with a feeler gauge and it was right on the money.so for the average guy that doesn't want to shell out the 40.00 dollars for the tool I can't see anything wrong with this tip .if your concerned about the screw braking off just add a little heat when you bend it.also I think it would be hard to lose it down in the motor as rapidjim seems to be concerned about.as far as clearances go it's not like your adjusting the valve on some exotic v12 it's a "1" cylinder gy6 motor.so there's my two cents worth I try'ed it.it worked and I think it's a good tip.later

jerryscript Hi Just watched your video what a great tip thank you very much..can't wait to try it out.later