| Author | Message | ||
     Adroit |
Well, here's the problem I'm having. I was riding my bike some distance and knew I was getting low on gas, but was running late and figured I had the reserve if I got too low. I got there fine, but when I went to leave, less than a mile away it started to bog down and then wouldn't run. Out of gas right? Well, I put it on reserve and it wasn't having it. So, I end up calling someone up and topping off the tank. After having it idle for a while, it finally stops bogging and I was able to ride it again. I figured it was bad gas, but I don't think that is the case anymore, because it seemed to happen again. I went to ride and it was bogging. While I was a little low on gas, I wasn't near empty and reserve didn't make a difference. So, given my past experience, I went and topped off the tank. It seems to be doing the same thing as before. Slowly getting back to normal as I let it idle. Any ideas? Is there something that might be causing an obstruction in my fuel tank that only makes itself apparent when getting low on fuel? Jets clogged? I changed the boot a year and a half ago and I don't think it is that. | ||
| Monzaracer |
OK your not going to believe me buT,,,I think I have the answer. Water. Yes, either from bad station, condensation or the cap oring being worn out. So take the seat off, unhook the fuel line, remove the one screw on tank cover, and all the screws round the cap, be careful of the vent check and tube. take the tank off and turn it upside sown and dump it into a container and if possible for ease of disposal mix it with old motor oil(places will take that but not straight contaminated gas), and have it disposed of. Now replace all parts, replace the cap oring. also fill with premium and add about a 1/4 of a can of Sea Foam to a full tank. This will help get the water out of the carb. also take time to have a little air blown through the tank valve on both setting just to be sure. I got stuck last 4th of July because of bad oring. It could run the water a little at a time on main but on reserve it was nearly pure water. you will also see better performance as the water was pulling the mandated ethanol out of the fuel there by decreasing the octane. also if you have local station selling race fuel give it a tank full, it will smell great and run awesome. I know several who mix it just because they did in other brand bikes. But only way to really fix it is slide of f tank and dump it out and replace oring, which Ill probably do every year now. | ||
| Adroit |
That seems to describe exactly my problem and answers why the reserve didn't work. Are there any other parts I should replace other than the o-ring? Thanks! | ||
| Monzaracer |
Nope and this was from experience. Stuck along the road ,had friend bring me gas but carb was overly saturated with water. did the tank thing, pulled air box and float bowl and tada started right up. Bet if you check the gas cap isnt real tight even latched, it will kind of wiggle a tiny bit,,,and that beveled opening give water a perfect place to run. the oring is like 6 or 7 bucks, and if you start from fresh and dont forget to blow the fuel valve out too. also a good inline filter couldnt hurt. thats my next addon after plates, rear tire and drive belt! | ||
| Adroit |
The cap doesn't seem to move really much at all. The O-Ring definitely needs to be replaced though. It's cracking and in poor condition. I also noticed the the hose that connects to the vapor vent valve might be pierced. Could this also be a contributing factor? | ||
| Ezblast |
No, but replace. EZ | ||
| Gearheaderiko |
So far thats the best plausible explanation. Its happened to me (and others) and I checked everything. Its a very simple system so there isnt much that can go wrong. However, it rarely rains here, I rarely wash my bike, its never left outside (except at work) and I didnt find any evidence of water (but I didnt look for water either). So that is the most plausible explanation if everything else is okay. A blocked vent line or faulty rollover valve can cause this and it often happens near reserve. If you have a full tank there isnt much air to vent and the 'weight' of the fuel will push it through the system. Conversely the less fuel in the tank, the 'vacuum' overpowers the weight of the fuel to push it through the system. This problem is usually quickly solved by removing the gas cap (unless you have a CA bike). You should have already checked that there isnt any thing blocking the 'reserve' portion of the petcock filter. You should also check that the petcock is working properly. Letting the fuel run out while in the "on"position, then turning it to "reserve" and see if the gas starts flowing again. You should make sure the off position works too. |
