It's certainly THE modification to make, especially on these machines. I have not decided if I'm going to do any more with the engine myself. Seems like any modifications after a pipe force you to be more focused on a certain thing you'll be doing with your quad.

Glad to hear you're enjoying the "new toy"

 

well, got all the new parts in pilot jet 148, new needle from yz450f (is same as stock and gytr jet kit needle, though it has 7 clip settings? huh) installed all the new parts including going up from 170 main to 175. i put the needle on #5 of 7. the stock clip matched up with the 3rd clip on the new needle, where did either of your needles match up, assuming you compared the two? took it for a test ride, pulls much harder through all throttle positions. wheelies in fourth gear are not a problem anymore. can't wait to take it out for a better test ride. thanks for all the help. next mods will be a parachute for emergency stopping and an emergency eject button.

 

yeah I think mine also matched up to about #3 but I put mine on #6 per the Dr. D website and used a 172 main. Diffinately a big difference in performance.

I think the only other thing I'd buy for now is nerf bars.. I already slipped off the peg and had the rear wheel(paddles none the less) shred on my leg.

 

Alright, now that everyone is up to speed, who wants a race on the track? Hahah...

 

K&N Filters definatly squese a few extra HP out rather than the foam filters but if you are running through any water I would seriously advise leaving the lid on. Even with Outerwares over the K&N water can easiely get through and if you gum it up with foam filter oil it will definatly have a harder time breathing. You can do like I did and cut 12 1" holes in your lid and put mini filters in that way your getting more air flow and you dont have to worry about sucking water.

The pipe and filter system you bought will definatly call for rejeting. The company that sells the pipe will get you very close but I tend to go up one size on what is recomended and check your plugs. Its much better to run a little fat then lean.

Also the YFZ Suspension is good but it can be built inexpencivly and feel like an aftermarket shock. Here is the place I would get all of my suspension work done and I see alot of Pro Riders here in PA with GT Thunders dual rate setup and it is awsome. The main spring rate that comes stock with the yfz are setup for a 135lb rider.

Here is all of the information you could ever want www.GTThunder.com

 

2STROKEFUMES, you bring up a lot of good points. I'll probably be asking you for advice down the road on suspension when I get to that point...

Basically, even with a stock airbox lid, you're going to get a little water in the airbox going through big puddles. It's not sealed up like my Polaris Scrambler. Even with airbox lid on, if you take the pressure washer to a YFZ, you'll get water in there. Anyone running with an airbox lid off with any quad should definitely take precautions before diving into a huge puddle of water (or just don't).

In my practice, with a foam-filter oiled filterskin over a frame of an airbox lid like I run, you don't foul up the K&N. Obviously, one wouldn't want to leave the filterskin soaking wet with oil. Just enough oil is needed to keep the filterskin tacky. Next spring when I start cleaning air filters again, I'll have to take some before and after shots. It's amazing to see an almost sparking clean airbox and a K&N that can last for a few months without reoiling. With a crankcase breather present in the airbox, I've even noticed the oil is a bit cleaner...

 

one thing i miss on the warrior that my honda 600 bike had..a jet access plug

 

thanks for the new website, anyone know anything about the r&d powerbowl? it is supposed to fix low end bog, talked to the guy at CT racing he advised doing this before any equialently priced performance mods. what few reviews i have read say it works great, not necessarily a power gain but improves performance a lot.

 

<div class="FTQUOTE"><begin quote>Originally posted by: klier

The manufacturer of the exhaust is usually pretty good with providing you the correct jets for your application, but you'll still want to do a spark plug check afterwards to make sure you aren't too lean.



Jetting is similar for all pipes, but it can differ greatly depending on where you live in the United States (elevation), and if you opt to run without an airbox lid or not.



I went with the Modquad Billet Air Intake kit, which is going to be very similar to the one you're thinking of getting, and very similar to Yamaha's own GYT-R Air Intake kit.







I went a step further and purchased another air box lid off of Ebay, cut out all the plastic leaving just the rim edge, and then I threw an oiled "Filterskin" around it. That way, I could essentially run with the airbox lid off, and still prevent most of the dust from even entering the air box to begin with (dramatically decreases how many times you need to clean and reoil that K&N!). I got that idea from a fellow forum member here, and it works great! I really got sick of cleaning the airbox as well as cleaning the stock foam filter every other ride before I went with this setup.</end quote></div>

This is the set up i came up with and it works very good. I posted my airbox cover in my page. In the picture the filter skin is not oiled. They come in 3 packs .
make sure you oil them before you use them. Any filter oil will work. I now only clean my air filter 2 or 3 times a year.

 

Simple solution and it works well Terry. Thanks a ton!

Are you going to come out and ride a little MX with us this year?