PROFILL

Hi guys... As a suzuki mechanic I can say that ALOT of Suzuki fuel taps with the vacume lines are BAD. They are just like every other brand bike, when it comes to the fuel tap, they are made by a third party company. The last 7 to 8 years have been very bad batches of fuel taps for suzuki. the bikes like, LTA400F Eiger LTZ400 LTA/LTA 500 Quadrunner LTF300 LTF250 All had diffrent shape fuel taps, but clearly come from the same maker... Needless to say that they all die all to easy! The two main faults is that some taps dont "shut off" so that when ever the carbi is dirty and the needle and seat dosnt shut off like its ment to, the bike will fill up the carbi... then the air box.... then the motor... untill the sump is full of fuel and the fuel tank is empty! Because the fuel tap is "on" and fuel can flow out of the fuel side of the tap. This is due to the little oring that is operning and closing with the bladder, it either gets dirt under it and cant close off or the oring getts little cracks in it... either way it stops working and lets fuel through. then there is the problem with the vacume bladder leaking. (the thin rubber sheet with the round metal disc on each side) with a spring pushing on it. either the suzuki sucks harder than what it should be, or the bladder is thinner than it should be. Either way the bladder gets millions of little holes and fuel can be sucked through it and down in to the innlet manifold where it goes in to the motor. often it will just make the motorbike run a bit richer than normal. or it can get to the point where the bike will be sucking so much fuel that the bike stalls, blows smoke, and runns very very very bad. the next level is that straight fuel will flow right through the bladder and in to the motor without the motor even running (applying vacume) thus filling the motor with fuel!!! the sneaky part is that the rubber bladder part looks fine, you cant see a tear or hole... it looks good. even to the point that it can trick the best mechanic for many hours. now not all bike die from it, but it must be common for a suzuki shop to fix and replace a fuel tap once a week. some fuel taps can die in 3 weeks, some may last 3 years. every year suzuki mechanics have been wanting a change to the part. and every year there is a "new batch" even with diffrent superseeded part number, but the problem is still there. one of the best ways to test for the broken fuel tap is to turn your fuel tap on to "prime" so that fuel will flow to the carbi, and while the bike is running, get a pair of plyers and squees the vacume line so that it is stopped from working. if exess fuel is causing the problem, then the bike will suddenly come right! also pulling off one end of the vacume line, and looking in side should show that the vacume line is wet with fuel... Where as a good tap will be always dry inside the vacume line. odds are that either the guy with the old tap was lieing about the tap being good, or he was starting to have problems and diddnt know. Thankfully the LTZ400 is better on fuel taps than the farm ATV's it must be somthing to do with the DRZ400S motor and the amount of vacume it makes, or is fed to the tap. Also there was a recall on the LTF300 Suzuki in about 2001 to 2004 and most owners were given a "restricter" that was to be put in the vacume line, that limmited some of the vacume. This was because there were so manny fuel taps dieing that time.... people can still order that part, if you have a good suzuki store with a good memory! I hope that this has helped.

Hello. Was there much oil in the motor when you drained it out the first time? Many Eigers when they are ran out of oil, scuff up the piston and alloy melts off the piston on to the cylinder wall, then killing the rings. Then when you put more oil in to the oil rings dont work and the bike blows alot of smoke. But normaly still runns ok for most people. you did say that it was a muddy ride, so there is a chance that the oil cooler is covered in dryed mud and stopped air flow and thus the guy over heated the motor, and killed the piston/rings. Did he get bogged and reved it like mad to get out and keept trying?

If you have only just rebuilt the motor and done a airbox mod at the same time. you should undo your airbox mod and put it back to standard before jetting the motor or fixing the problem. There are alot of LTZ400 bikes that have sudden running problems with the snorkel removed or even the airbox lid removed. it is due to the type of carbi, as the CV carbi needs an amount of airbox restriction to lift up the slide in the carbi. All CV carbis can suffer from this effect. just what type of airbox mod did you do? remove the snorkle only or the lid as well? but regarding the "missing shims" did you loose them and replace them? or do you know that you did not put them back in the motor? If they are missing, there would be a very loud tapping from the buckets bouncing up and down with the 4mm gap between the top of the valve and the cam. I suspect that they are not missing, because you would be asking "why is my bike making this noise???" But if in doubt, go back and check what you last did to the motor. also undo the air box mod, get the bike running like it used to first. then open up the airbox and do jetting once you know the bike it right.

Hello there Quad Crazy people. Well my name is Scott, and I am from Profill Australia. We love ATV and all types of OFFROAD riding! I am the guy here that gets to do all the online communications and answers the technical questions. Some people may be thinking "why is a brand wanting to be on here?" "is it just about trying to get in our face and making a quick buck?" In a word, No... Yes we want as many people around the world to buy our filters for their ATV's, But we have need's too! We need to ask people around the world about the diffrent ATV's that are out there. Sadly there are many many ATV brands that never come to Australia, and so we can never measure the fuel tanks up or see what filter we can build for them! We currently make a range of fuel pre filters, fuel pump kit's, funnle filters. for the "BIG 5" Honda Yamaha Suzuki Kawasaki polaris. There are many models of bikes out there in every brand that we dont have on our list due to the bike not comming to Australia, some brands are missing altogether! This is our main aim of being on here, because we need help with getting access to the measurments of fuel tanks, fuel caps, on the diffrent bikes that are in the USA. And if there is any technical help I can give back from my last 13 years as a motorcycle mechanic with a specialty of engine diagnostics and EFI then I would be glad to help. so if there are people who look on our fitment list and see that their bike is not listed, then we would love to hear from them, we can talk with them and together we can work on a prototype. Normaly a fully working filter is sent out to the person who helps with the measuring of the bike. They get a free filter, we get the info and expanded range. kind regards from scott ps: this forum has some very warm and friendly people on it, it is so good to see a forum showing concern for its members, as in the example of the prayers needed for member Raptor8