Ok people the dollar was strong so it's the cheapest they have been to order. So I have a lot done to my cr500 so results may vary ... I am ported for 100 octane with a deleted exhaust bridge with a smart carb.... I found for me the lower pull was lacking a bit then there was an explosion of power... With the ignition I just leave it on the most powerful setting.... The bike idles way better... The power starts way earlier and is a constant hard pull from 4000 to 8500... It is a cleaner more responsive linear crazy powerful pull.... Now is this one of the first things you should do.. Nope.. But if you have done a lot and you are looking for a bit more power with a much better delivery this is highly recommended... Plug and play
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