Has anyone done their own dynojet kit on the 450 yet? If so please send some advice and pics if possible, I am going to get an exhaust for it but have not done it just yet, and I might go ahead and tune with the dynojet now and retune later if I have get the exhaust depending on how much trouble it is.

 

I would also like to hear from people who use the dynojet kit. It says to use the 132# if you have an aftermarket pipe, but it still comes with a 136# and 140#. If you also have a K&N filter in addition to the pipe, should you bump up the jet?

 

Jet kit alone is pointless. No need to re-jet the machine if you haven't changed the air/fuel ratio in any way.
If you're riding at a much different altitude, or have put on a performance exhaust and air filter then you need to change the jetting.

 

Dynojet kit is a rip-off anyway. You can buy the bigger jets you need (main,pilot) separately for way less, unless you want the extra spring and fancy sticker. Do some online research about jetting, there's a ton of info out there.
I don't understand why so many people list a Dynojet kit as an upgrade along with their other mods below their posts.
If you've changed your pipe, filter, carb, etc. it's obvious that you've re-jetted. It's like saying:

'97 Quad
-Mud Tires
-AIRin tires
-blah
-blah
-blah

 

We both do have aftermarket pipes and air filters.

Also, $45 for the Dynojet kit is nothing. I'd rather have decent instructions and a variety of jets.

 

I have a different air filter and HMF pipe. I am using a 140 jet that came with the pipe.

What are you guys with similar mods running for a main jet?

 

how will you know which jet to select

 

They have several sites with info on how to do a plug reading properly and how to jet accoringly.

 

can u post up the several sites

 

Here's one short one
http://www.cdracingonline.com/id57.htm