Jets Viper CPR

Robbe144

New member
Joined
Dec 13, 2011
Messages
39
Location
Sweden
Hi
Please, I need help with this :)
I'm rejetting and reading this site have given me some good info about how to start the setup. Since I need to order the jets (no local pickup) maybe I should get sizes around my starting point.. I want to use stock air box with carbs vented to it. CPR pipes.

Home riding at sea level ~ -10 C (14 F?), don't get much colder. Away riding 300-700m (1000-2000ft) mostly around same temperature. (can be both colder and warmer) Looking at MJ 160-160-162.5, N 3.5-4-4, PJ 47.5-47.5-47.5, PS 1.5. Is that a good starting point for sea level? I understand that I'll have to test test test, check plugs, listen and tune, but can you give me a hint if I'll probably be on the lean or rich side at start?

Also, when my home setup is ok, can I just buy one size smaller jets and lower the needles 1/2 step when I go away or is it probably ok anyway?

Thanks
Robert
 



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