200 ec 2006 jetting(no expert at all)

[wilkoryte]

hello everybody

I own a clean 200 ec 2006 (approx 700 miles)

I live in france(europe ) and my gas is stock
here are the settings
slow jet : 52
main jet : 185
needle : NBHW 3#
slide : 5
screw : 2,25 t
spark plug : black

where I live is at sea level

my gas is not very effective at low revs (may be it is normal !?)

I ordered 175 and 180 main jet, 48 slow jet; do you think it could be correct values to start

[widebear]

I can't comment on the 200 , as I have no experiance but I can tell you that your jetting would be very rich ,even for my 300cc and I have not heard of the needle you are running. I as well am curios to see what other 200 guys are running and what the story on the needle is? You might want to i.m. speedymaniac to see what he's running

[wilkoryte]

thank you for your answer

I tried my new jets
slow jet : 48 the air screw is now at 1,5 turn, it seems a correct value(?)
main jet : 180 my spark plug is brown/black I will try the 175

I visited the keihin website but could not find any correspondence between
NBHW and keihin values !?

[widebear]

Its good that you are checking your plug condition, Just to give you an idea yesterday I replaced the 170 main in my 300 with a 165, elevation 1000 metres @35. celcius

[JoshP]

First things first never change more than one thing at a time when fine tuning the jetting because you will not be able to tell what has done what. It sounds as though your issue is in the low end of the throttle which would be your pilot and needle. Now I would get that cleaned up first and then tackle your main. Your 45 pilot is a good place to start but your needle will probably be too rich to feel the difference. If you notice it is a little cleaner but still bogs try moving the clip up on the needle to lean it out a little. You will not find any information on the Keihken site due to GASGAS and others using their own jet descriptions. Another option would be to base line it with one of those fancy dancy jetting kits. LTR needles are very nice although I'm not sure how well they would work on a 2006.

[wilkoryte]

Originally Posted by JoshP

First things first never change more than one thing at a time when fine tuning the jetting because you will not be able to tell what has done what. It sounds as though your issue is in the low end of the throttle which would be your pilot and needle. Now I would get that cleaned up first and then tackle your main. Your 45 pilot is a good place to start but your needle will probably be too rich to feel the difference. If you notice it is a little cleaner but still bogs try moving the clip up on the needle to lean it out a little. You will not find any information on the Keihken site due to GASGAS and others using their own jet descriptions. Another option would be to base line it with one of those fancy dancy jetting kits. LTR needles are very nice although I'm not sure how well they would work on a 2006.

thank you for your wise advice and help, next time I will try to change the needle settings only
some LTR products are sold in my country but I am not sure about jetting kits

[wilkoryte]

Originally Posted by widebear

Its good that you are checking your plug condition, Just to give you an idea yesterday I replaced the 170 main in my 300 with a 165, elevation 1000 metres @35. celcius

small jet but high temperature !!