need a couple pics of the2.6 clark tank on the yz

I used a different Yami petcock ('03-'05?) that has the outlet on the right so that I did not need to reverse the position of the stock petcock.

I used a WR petcock so i have the reserve option.

I just fitted the IMS tank on my '08 and it fits ok. I needed to use spacers on the lower shroud bolts to get them to bolt to the radiator louvers. Per Gray's suggestion, I used a different Yami petcock ('03-'05?) that has the outlet on the right so that I did not need to reverse the position of the stock petcock.

I second this post. I bought a clark first but returned it before I put gas in it. I found it felt too big when you were on the bike.

I bough an IMS in black, bought a different Petcock for the direction change and made some spacers too. It look great and feels pretty decent for a large tank when riding.

Rob

Here are some pictures with the IMS Tanks installed. 2008 YZ450f..

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Rob

Thanks Rob! Those are the best pics ive seen yet and they show me that the tank definitely blocks a significant amount of airflow through the shrouds. I may have to put a cooling fan on for the slow speed stuff as I already get pretty hot with a stock tank...

... the tank definitely blocks a significant amount of airflow through the shrouds. I may have to put a cooling fan on for the slow speed stuff as I already get pretty hot with a stock tank...
Never been a problem for me.
Never been a problem for me.

Come to Vegas and ride with us... :thumbsup:

I know early on there were some issues with both the IMS and Clarke tanks not fitting quite right, have these issues been resolved over the years or are they still there? I need to get a tank for my 06 and I'm still on the fence regarding Clarke vs. IMS.

I don't know if either of them really fit perfectly. I prefer the fit of the IMS, personally. It bolts to the frame very nicely, and clears the engine well, but is slightly higher and wider than the Clarke. The seat is hard to get to fit far enough forward on it at first, but the seat pan eventually "adapts". I and others have also found it necessary to use longer bolts with 5/16-3/8" spacers on them to attach the shrouds to the radiators. I find it simpler to bolt the shrouds to the radiators first, then pull them into position on the tank and bolt them up.

The Clarke clears the engine "adequately", but it's a little close in a couple of places, and crowds the radiators. The biggest fit problem with both of the ones I had was that they were too long between the front and rear mount bolts, and it took two people or the clever application of pry bars to get the second bolt threaded into the frame straight. I finally made a custom bracket for the rear on my son's bike to correct the problem.

Other than that, neither has really given me any problem.

I don't know if either of them really fit perfectly.

That's my gripe... I don't know why companies like IMS and Clarke, which have been doing this for a long time, have such a hard time making a tank that will fit these bikes. It's kind of irritating really...

I'm still considering trying the "hot water and compressed air" trick someone tried a few years ago on his 06 but I'm not sure you'll gain enough capacity from that approach to make it worth the effort. I should go re-read that post again to see how much he actually gained I guess.

Thanks Rob! Those are the best pics ive seen yet and they show me that the tank definitely blocks a significant amount of airflow through the shrouds. I may have to put a cooling fan on for the slow speed stuff as I already get pretty hot with a stock tank...

I have never had a problem with over heating on my YZ. I race cross country which are 2 hours races with tight woods. Good air flow. My 2008 450 XC-f use to over head all the time. Even just on the starting line. It was crazy. One of the many reasons I unloaded the bike.

I bought the clarks but returned it. The clark tank sits way too high on the YZ. I like the IMS one much better. Plus it is still comfortable when kicking out your leg for a turn. As long as you have the spacers on the radiator like everyone is discussing you will be fine.

Let me know if you have any other questions.

Rob

how wide are those rad spacers and do they go under the lower bolt? I already have spacers for my WC rad cages and I'm curious if I'll have to space them further yet for the IMS tank.

I just put the 3.1 ims tank on my 07 450 and didn't have to add any spacers. It just bolted right up. I also have the devol radiator cages on the bike as well. I am very satisfied with the larger tank and don't even notice the larger size and the extra ride time without running out of gas is nice. I even installed a tall seat (i'm 6'5") so the tank doesn't look our of place and with the bar risers the tank looks almost stock.

You will know by bolting the tank down, then fastening the shrouds to the radiators and seeing how much, if at all, you have to pull back on the radiator and shroud to get the bolts to line up. If it seems excessive, add some length to the bolts that hold the shroud to the radiators.

I just put the 3.1 ims tank on my 07 450 and didn't have to add any spacers. It just bolted right up. I also have the devol radiator cages on the bike as well. I am very satisfied with the larger tank and don't even notice the larger size and the extra ride time without running out of gas is nice. I even installed a tall seat (i'm 6'5") so the tank doesn't look our of place and with the bar risers the tank looks almost stock.

Got any pics by chance? And where in ID are you?

The only area I have been having overheating problems is in the Mountains here in Vegas. We get up in the 8-10K altitude area but its still over 80 degrees and some of it is pretty tightly wooded. You couple high altitude with relatively high heat and loose soil (poor traction) and you will find the weak links in any manufacturers machine. :thumbsup:

Got any pics by chance? And where in ID are you?

I will have to take some pictures tonight. I live in Meridian/Boise. Just rode Idaho City last week and it was one of the best rides I have been on this year.

I will have to take some pictures tonight. I live in Meridian/Boise. Just rode Idaho City last week and it was one of the best rides I have been on this year.

I'll check for the photos tonight.

I grew up in Twin Falls and spent a lot of time riding as a kid in the Sawtooths. I'm going back next month and going to spend a day riding there again, can't wait.

how wide are those rad spacers and do they go under the lower bolt? I already have spacers for my WC rad cages and I'm curious if I'll have to space them further yet for the IMS tank.

I used a little longer bolt with my Zip Ty rad cages and my 3.1 IMS on my 07.

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man do u ride your bike??? that thing is spotless! very nice looking

man do u ride your bike??? that thing is spotless! very nice looking

Ya I ride it. Notice the date on the pic. It doesn't quite look that good these day's.:thumbsup::worthy:

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