Tpi valve installation - step by step

Ok Tortured fans, in light of an upcoming review, I wanted to give everyone a walk through of the TPI Valve (lowboy) on my Yamaha. This is a "valve" for your airbox that opens it up. It also gives you the option to close it again when you wash your quad, hit the mud, or an extremely dusty condition. It is also contains a filter to help protect you from the extremely dangerous elements when it is open.

1) I went ahead and ordered the valve template to eliminate some of the guess work. This simple solution made fitment of the product easy as pushing the throttle. The pictures below show my airbox before the installation and then scarring the surface with the template. For this I just used a nail in my shop.


2) Time to start the cutting. :headbang: To start off I drilled a hole in each corner large enough to get my cutting tool in. Too easy!





3) After cutting the center out with a hacksaw blade (couldn't take a picture of this part...sorry) I cleaned it up with a utility knife. What I also did here was place the valve in the hole and just shaved a little bit at a time to ensure I got a nice snug fit. I finished up by taking sandpaper to the edges and along the inside "ribbs" of the airbox to remove any loose plastic that might try to introduce its self to the carb, then simply blew the fine particals out with my air hose.




4) Ok, now that the valves are seated in the holes its time to secure them down. To do this, I drilled pilot holes in the box using the valve its self for a template. Then I started screws in four corners, removed the one screw that comes installed in the valve, drilled that pilot hole, and finished securing the valves in place. Once the screws were in, I blew everything off one last time to ensure I didn't endanger the life of my quad.




5) Finally, I replaced the airbox lid, opened the valves, cranked it up, and drank a cold beverage while I listened to it growl like the bear it is.






Now I'll bet ya'll want to know how it performs! For that you'll have to stay tuned for the review to be released. I should have this review out in less than a months time. I'll be sure to fill you in on all the good stuff at that time. See you then!

desertrat said:

Very nice, love the step by step..
do you think it is necessary to have 2?
Did they come 2 in a kit?
I would think by the size that one would be sufficient. When you test them maybe that could be a concern and test one at a time.
On my old Big Bear it had a intake hole about as big as a quarter so I cut a larger hole into the top of my airbox. Really didn't notice any difference but I added a Dial-a-Jet after that.
I should see if they make a size to fit the Big Bear just for the ability to close it up. That would make washing that much easier too.
Also I couldn't read the blue font with out highlighting it first.

Click to expand...

This post is a carry-over from the old software. The blue fonts showed up pretty good on the old, but were very hard to read on the new. Thanks for pointing that out. I changed to it green. Additionally, the step-by-step should be at the top, but I was fixing the image codes and lost one picture. I tried adding a seperate post and then merging them which caused it to be the second post instead of the first. lol I'll get it right soon.

Now on the topic at hand. These "valves" are sold individually. I ordered two because I wanted to really open up the box. I have experimented with one open and one shut. I've also marginally closed one with the other all the way open, etc, etc. Bottom line. With one of these valves, I could not tell a difference in normal riding circumstances. At higher altitudes, the adjustments can be noticed if you know what you're looking for. If I close both of the valves in a normal situation, it is pretty noticeable.

This review should be published already. I need to get on the ball!:club: