so riding down the highway full throttle at 180km/h let go of the throttle I THINK then tried to throttle the revs didnt go up, it sputted ?? :dunno_black: i jst throttle and it will do nothing then it will go up alil bit then not go up :S lol wtf? after i didnt throttle for abit then throttle again it worked stopped at designated location then headed back home through the highway again went about 120km/h 3/5 of the throttle maybe ? it did same thing this time it didnt come back up and it just died, then....waited started it worked then did same thing.... turned it on PRI and it worked till now... still on PRI no problems so far left it idling no the highway on pri for like 5-10 minutes to kill some fuel..... what you guys think? is ther a problem wit my bike?
Sounds like it was starving for fuel if it works better on 'prime'. Try cleaning the strainer in the bottom of the tank, check the petcock and fuel lines are clean, also check vacuum hose is not split and is firmly connected to carb and petcock.
It could also be that its f.....d from running too lean if you've been riding it at 180ks with no airfilter, in which case you could blame the nut that connects the handlebars to the seat.
Quote from: the mole on May 01, 2010, 04:24:55 AM
Sounds like it was starving for fuel if it works better on 'prime'. Try cleaning the strainer in the bottom of the tank, check the petcock and fuel lines are clean, also check vacuum hose is not split and is firmly connected to carb and petcock.
It could also be that its f.....d from running too lean if you've been riding it at 180ks with no airfilter, in which case you could blame the nut that connects the handlebars to the seat.
thanks for the reply hey hmm, okay will get to it soon , i chucked my air filter back in b4 that already LOL how do i check the petcock?
Quote from: the mole on May 01, 2010, 04:24:55 AM
It could also be that its f.....d from running too lean if you've been riding it at 180ks with no airfilter, in which case you could blame the nut that connects the handlebars to the seat.
:laugh: :laugh: :laugh:
Also check to make sure that your intake manifold boots are secure and free of cracks. I have had a similar thing happen to me, but not at 180 km/hr. It was more at normal traffic speeds on the highway.
Quote from: Saculia on May 01, 2010, 08:06:51 AM
Also check to make sure that your intake manifold boots are secure and free of cracks. I have had a similar thing happen to me, but not at 180 km/hr. It was more at normal traffic speeds on the highway.
alright thanks ill get to it :cheers:
the fuel starvation issue is more of a problem on the older petcocks. what year is your bike?
Quote from: jeremy_nash on May 01, 2010, 05:47:08 PM
the fuel starvation issue is more of a problem on the older petcocks. what year is your bike?
its an 05 model F well i was riding it for 1 hour wit it on PRI ? so is it faulty
I would guess probably not. At high throttle positions, for extended periods of time, theoretically it may not have enough vacuum to operate the petcock properly.
my car does the same thing, when going up a long, very high hill at full throttle, the A/C will switch to defrost, due to not having enough vacuum to hold the switching valves open
There is a lot of things that can cause the "fuel starvation" symptoms. #1 gas cap vent is not letting in enough air. #2 petcock vacuum issues. #3 bad/clogged fuel strainer in the tank. #4 bad/clogged fuel lines. #5 air passing by at extreme speeds is sucking on a vacuum line and robbing it from where it is supposed to be going. I'm sure there is a lot more reasons.. I just want to throw in what my "fuel starvation" problem was. Inside the carb there is a vertical needle that moves up and down to control how much fuel is getting in to the combustion chamber. On the left side carb my needle was bent just enough to "stick" in the sleeve that it's in.. so I was either getting too much or not enough fuel at freeway cruising speeds and the bike would sputter out and die.. and not run right until the needle unstuck itself.. Putting it to prime gave me the false impression that it helped.. but eventually the needle would stick again and I was like WTF for a a few days until i pulled those caps off the carb. Having straight needles in there I haven't had the problem again. (I think it was causing a lack of fuel issue because I was getting like 65mpg.. now I only get around 50mpg.)