What do u guys think about the Dyno jetkit 2120, it is a stage 1&2, fully adjustable, it comes with a K&n replacement air filter

The K&N filter is not the filter of choice for the KLR. The solid top plate reduces airflow area to less than stock. a UNI or Twinair would be better. I have no knowledge of the dyno jet kit.
Regards....justjeff

Thanks Jeff I will see if I can get a twin air instead

I looked around and found the twinair filter, is that an oil coated filter to like the stock?

Yes it is. I am not aware of any filters that do not use "oil" to trap the dirt other than pleated paper filters. The K&N is a pleated " gauze" and uses the "oil trap" system too. I used K&N filters for years on the stock cars and found them good but in the TINY KLR air box the solid cover of the K&N reduces airflow.
Regards....justjeff

To each their own once again but, get a UNI aircleaner and the recharge kit to oil it, then buy a KLX needle kit. It uses stock numbered jets compared to the DJ kit which uses their own numbering system. It may be a pain in the arse asking for help seeing as vry few use the DJ kit over the KLX kit. The kits have the same design in the way of the needle etc but the jets are the issue in the end. I'm not sure about the cost of the DJ compared to the KLX needle kit.....but it isn't an expensive kit, the KLX that is.
The UNI is the filter of choice for the KLR as it flows the best over all others. The twin air has had issue with disintergrating or falling apart if you use different oil in it.

Again to each their own......no pressure at all....just saying...

No it's the Uni that falls apart if using No-Toil products. The glue gets soft and the seams fail, happened to mine.

http://www.google.com/search?q=no-to...x=&startPage=1

The Twin Air costs more than the UNI but it's a much nicer filter.

I stand corrected,...but I still say the UNI is the one to use, but I use nothing but the UNI oil in it.

is there any advantage to the KLX needle kit here in Colorado at altitude. Esp since I ride up in the Mt's quite a bit at 8 -10 thousand feet.

IMHO, yes as it's totally adjustable with a much better taper .

Once again, to each their own.