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Nuthin' like another colorado jetting question!

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(sorry..... i know we get these alot....cant really find what im looking for)

first off: 2003 drz 400 e, snorkel out, and procircut slip on.......even went with a 13t front spocket

I've bought the james dean jetting kit. Going to colorado and will be riding above 9,000 ft. will the recommendation of a 155 main and red needle on 4th clip give me enough power to climb hard or will it bog on low end ( i know i will have some).

I was running a 140 main and stock needle on the 3rd position in new mexico....8,000 to 11,000.... seemed to work ok, but not enough low end get up and go.....especially when you need to pop the wheel over rocks and trees, or steep inclines.

any suggestions? ive posted in the jetting forum too. I'm a little impatient, trying to get bike ready to go.....thanks tho

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Nothing will bring back the snap you have at lower altitude. The best you can do is compensate for the lower air density and have it run clean. Eddie is your best resource. Did you have the snorkel out in NM with the 140 main? What is the low speed jetting? 45 with CE intact?

Here is where I would start (snorkel out, CE intact)


145 main

45 pilot

AP limited to 1.5 sec

Mixture screw 1.5 turns. Adjust on site for best running.

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