CRF's Only Forums

Hi,

I have a 1999 XR100 with the white tank, the problem is: If the gas sits to long in the tank, the carb gums (gray film) up, and clogs the jets. (A Month at most)

Has anyone noticed this phenomenon? I am beginning to think it is a ne gas adative that is causing the tank to react with the gas.

I was wondering if a new model gas tank would fit?

Thanks
MikeW

I really don't think the crf tank will fit they are two differnt bikes sorry. Alec

Hi Alec,

Thanks for the info.

By the way my sister lives in south bend.

MikeW

Hey no problem I am all the way down in Bloomington so South Bend is a "little ways up there"!

The 2000 red tank should fit ur 99... Im not 100% on that tho...

Well I took the carb apart for the 3rd time, and it was really bad.

Everything was stopped up. So I am having the carb cleaned. I took the tank off and it looked liked it had some brown stuff that looked like dirt and some red liquid that looked like rust in water.

If I am getting bad gas, i would think my CRF450 and my YZ400F would have a problem also, since they all use the same gas. I have taked the carb off the YZ many times over the past few years and found nothing like what is in the XR.

Not sure what is going on.

Mike

It's also possible the fuel lines are melting. Had the same problem with a Rotax and Tempo fuel lines. Recall as I remember. I doubt that it's the tank, and it sounds like your other bikes are fine with the same fuel.

The same thing happened to my bike, a Yam TT225, which has a white plastic tank, and my other bikes didn't get that problem, although they all got gas from the same source, and the Yam was the only one with a white tank. I'd get a new tank for a quick fix, or try fixing it yourself for cheap. It's not the fuel lines because a disintegrating line does not send its slough upwards into the tank, but they are prone to disintegrating so should be changed anyway. Since your bike is older, you should replace the fuel line and add a high quality filter in the line. I paid my dealer ($87) to fix my problem. Here's what he did: He washed out the inside of the the tank with soapy water. With the soapy water inside he put in a handful of washers (that won't harm your plastic tank), shook the tank around a lot, dislodging the crud. Do this until the tank appears clean. Remove the petcock and clean it. Rinse your tank well, and blow off the inside with an air hose and let it sit in the sun until it dries. Also, take apart your carb and clean out the crud. Make sure the jets are clean. That's about it. It worked for me. It's something about the white tank and don't ask me why. Sunlight may be the culprit or moisture from humidity. My other bikes have dark plastic tanks and no problems. Go figure. This just happened, so I don't know if this is a longterm fix. Good luck.