The Myth of the IMS / ZipTy tank.
Posted July 11, 2005 - 07:59 AM
I'm wanting to get a IMS tank to suit a WR250F 2004. After searching the forums there seems to be a lot of different opinions on them. It seems from the search that people with WR450F 2005 models have had the most problems of fuel lines being to close to the header and the tank rubbing on the engine. There are a lot of different treads about these tanks but no real answer. The 2005 models are meant to of been lowered slightly. I heard that the frame was lowered at the headstock. Could this be causing the problem cause the frame is more compact or did they reduce the ground clearance as well?
I know that IMS makes the ZipTy tanks but are they the same apart from the having the option of a right side petcock? Also is the tank for the WRF and YZF the same with just a moveable front mounting lug for the different seats.
When you look at the picture's on the IMS website the tank for the WRF has a lot more clearance above the header than the YZF. Also the kickstart fits better into the tank on the WRF. I think the the photo of the WRF is a 250 and the YZF is a 450 and that makes the difference.
Sorry about all the questions but im looking to buy 3 tanks to import to Australia so I just want to know if there is really only 1 model of IMS tank or more.
Posted July 11, 2005 - 10:21 AM
Posted July 11, 2005 - 04:35 PM
1. the Zip Ty right side petcock, screws into the tank, i.e. the petcock is like a bolt and threads into the tank. Stock petcocks has 2 screws on either side of the petcock to hold it in place. The Zip Ty petcock could get hit in a crash and come loose/unscrew. It came/needed tons of teflon tape on the threads to keep it from leaking. It seemed like the teflon tape was disolving in the gas. When fully tight the petcock was not straight, meaning it was turned out, think of 12 oclock as in line with the bike and wheels, mine at full tight was 10:30 so the hose end of the petcock was sticking out towards my leg, again it could get hit and loosen, splashing gas onto the header 1" away.
2. When riding in 75 degree weather I noticed the tank was bulging out near where the lower shroud mounted, near my leg, the bulge caused the shroud to stick out enough so the mounting wasnt flush. This is the part right over the header.
3. the tank rubs on the head, enough to take off some metal. I think in the end the tank would rub thru (the plastic). Plus the tank felt thinner than the tank I have on my 2000 wr
Over all I just felt the tank wasnt up to spec on the fit, it shouldnt rub on anything. The Zip Ty petcock is too close to the header (yes I ran heat tape etc) and was poorly designed and could cause a fire in my opinion.
The slimness of the tank was very good for riding. The only plus.
I expect a tank to last years, and if it rubs from day one and has a leaky petcock 1" from the header, the chances of a problem are high, be it a fire which could be very serious, or just perhaps a small leak from the engine head rubbing thru 2 years from now. Either is not acceptable.
I am now running the stocker until I get one from another vendor.
Posted July 11, 2005 - 04:46 PM
Posted July 13, 2005 - 05:12 AM
So it sounds as the standard IMS tank right side fuel pickup is better than the Zipty. If you are prepared to tip the bike over to get all the fuel from the right side!
I have an IMS 4 gallon jug on my 99 WR and have no leaking or clearance problems. It only has one petcock on the left hand side but I've never had a problem with fuel getting trapped in the right side, even though it hangs quite low.
Whenever you accelerate, climb a hill or wheelie, fuel sloshes to the back of the tank where it can cross over from side to side. Unless you run low on fuel when you're putting along a smooth trail, both sides empty.
Posted July 13, 2005 - 03:19 PM
Fit and finish of the IMS tank SUCKS, period.
Posted July 13, 2005 - 04:46 PM
it also hangs down two inches too far on the left side (below the inlet to the carb) and that's just extra fuel that will never get used.
DD, do you actually run out of gas with fuel trapped in the lower part of the tank? Mine hangs lower on the right side but both sides seem to run out evenly.
Posted July 13, 2005 - 05:31 PM
DD, do you actually run out of gas with fuel trapped in the lower part of the tank?
The newer version of the IMS/ZipTy Racing tank has a return hose on the right side to help the right side of the tank drain completely (which it does.) What I think is dumb is the left side of the tank drops two inches below the fuel inlet on the carb. When the level in the tank reaches the level in the carb the fuel stops flowing because the level has equalized.
I've never run out, but it was running on fumes (and began to stutter just as I reached the truck) after a 104 mile ride and it still had two inches of fuel in the left side. ZipTy says it's a 3.3 gallon tank, but realistically, it's only 3.1 which is what IMS claims.
Posted August 27, 2005 - 10:01 AM
I still have the IMS tank if anyone wants to buy it.
Posted August 27, 2005 - 11:03 AM
Posted August 27, 2005 - 03:47 PM
I know for sure that the IMS model for WR/YZ 400 and 426 was different from the Zip Ty model also built by IMS.
I bought both and compared them and finally decided to keep the Zip Ty for my 426.
That said, I think that, since 2003, there is no two different models anymore and the only one available from IMS is the one that Ty races with.
Somebody can confirm that?
Posted August 28, 2005 - 07:44 AM
I E-mailed IMS to see if they have any suggestions. I'm sure they have had these questions before, hopefully they can direct me towards an aftermarket petcock that will correct this.
Posted August 28, 2005 - 09:09 AM