Dry plugs

[VAmastifrider]

Compression, got it spark , got it fuel going in carb , got that dry plugs , yes got those too , wait , what?
Don't see any leakage at intake , oil does not have gas smell , so where is my dang gas going?
Bike did some major popping and acting up ( like starving ) so I took it back up the driveway now it won't start. Old plugs were swapped for new ones, wires checked for cracks or grounding. I can twist throttle watch gas go in , plugs are NOT in and all I get is compression air out of plug holes NO gas.

 

[Sven]

Bike been sitting over 9 months? Gas might clog the jets.
1. Compression you say? WOT are the numbers? Thumb over hole does not count or chase your tail while draining the wallet throwing parts at it.

2. Spark: A backfire says spark so 1 down.

3. Fuel: The pumper passages might be clean, but if you drilled 3 different size holes in the middle of a door, opened the window to set a breeze, which hole won't pass air thru it? So says the same triple blend of fueling. Clog one of the passages, we go lean 'like starving.' Idle air screw/slow jet/main jet all need to be cleaned or she leans out.
a. Just to run down the tree root, tank has gas; petcock flows; fuel line is not kinked/flows slow; float is not stuck; gas is in the bowl to fill the pumper... is the assumption.
b. For argument sake, lets say a pop and kinetic say compression.
c. With a well charged battery; air cleaner removed; a can of brake cln/contact cln'r/WD40 of your choice; crank and spray the liquid down the carb. Have garden hose ready and test outside so the garage does not catch fire.

Conclusion:
If you can spray and keep it running = Clogged jetting.
If FI, then fuel pump pressure = Low.

 

[VAmastifrider]

Like I said gas goes in,,,,,,, but where it goes after that ? Lol no leaks under bike and none on motor none in oil.. even pulled the plugs and gave it three good twist watched the gas go in and turned it over, no gas came out of plug holes. Valves seem to be moving fine , scope don't even show signs of fuel going in cylinders . First time I've ran in to this. Probably pull carb next chance I get.

 

[Sven]

Like I said, you're chasing a fuel issue. And like I also said... spray the WD so it lights off and keeps running. Then pull the carb. If it does not run with said remote fuel in a can, it's compression.

Which is it? Buy a compression tool and read the number. Under 100psi it's not the carb. Leave the carb on for now. It does not need to be torn down if the comp is dead.

And has the bike been sitting long? Back to cleaning the carb is the foregone conclusion.

Signed,
NOLTT (no one listens to turtle)

 

[VAmastifrider]

No bikes don't sit , even when they don't get rode I still fire them up warm them up and at least do a 4 mile lap minimum once a month if not twice a month. I try to start them and let them idle more than that.

 

[Th3InfamousI]

Have you done a compression test? Need to know the #'s if it's too low it won't start.

Sent from my moto z4 using Tapatalk

 

[VAmastifrider]

Ok , so as stated before , never had one do this before............And now the update
So standing on right side rock throttle and watch fuel spray, then walk to left side rock throttle hit start and no gas, rock it some more same thing. Look , check , go back to right side visually see gas spray back to left side ( where i can see back of carb , spark tester so on ) do it again. Well with only having a few mins at a time messing with it ( due to life) I was in there and for a change didn't have the radio on , didn't have people talking in my ear, I hear a funny sound in the tank, so I pulled fuel line again turned it on , got gas ( so I thought ) hooked up fuel line to tank took off of carb and did it again. Gas came out then stopped , as I pondered at the dribble , I heard that sound again then gas came out again, ( three times it did this.) So I put valve on reserve and it poured just fine like it should. In short , the times I thought I rocked the throttle enough to flood it it won't spraying but the first time while I was looking right at it but not the following 2 -3 times consecutively after that, but with the wait and walk around to other side it would do just enough spray I thought it was working correctly.
Now with it set on reserve it works like normal. Never had a bike do that to me no dirt bikes , four wheelers road bikes none of them. My fault for taking for granted that just because I saw it spray once it was doing it every time. Lesson learned.
And people ask why someone needs multiple bikes. Because in a busy life , when 1 messes up you have time to tinker with it and ride the others. All three are running ( this needs new fuel valve but it's running) so on to the next project off rebuilding the forks on another bike.

 

[VAmastifrider]

Have you done a compression test? Need to know the #'s if it's too low it won't start.

Sent from my moto z4 using Tapatalk

Youll see in first post the main issue was all signs pointed to carb working but no fuel in jugs. Plugs were dry, that was the part messing with me. As too where the fuel was going. Never had a fuel valve work on res that didn't work correctly in the on position. It was one of those " too sober too think right " moments.

 

[SB03chopper]

You may have a bad liner, and it is coming apart. When you pull you shut off check to see if you get some loose pieces of paint or chunks of shit. May want to pull tank, and see if you hear rattles in it.

 

[VAmastifrider]

I looked around ( what I could) with scope , didn't see much but was leaning to that side of things. Up and down side is , it's a one piece tank.

 

[Sven]

Most petcocks I think filter rez/main. The screen fits over the two length tubes. What are the odds you just had to start the bike and did not know if you filled the tank up or not? With rez turned on, it starts. If you top off the tank and turn it back to on, it should flow as fast as rez. Does the tank have a float banging inside?

 

[VAmastifrider]

Tank is full - the 2 miles coming home from last ride............ well, actual ride, going down the road 100yds don't count.