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Enduro Intake/Carburetion - 2 stroke Jetting, Reeds, Air Filters, etc.

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Old 02-26-2010, 12:02 AM
Evans P Evans P is offline
Join Date: Jul 2009
Location: UK. South Wales
Posts: 2
Default Running rich

I have a 2005 ec250. Main jet 178, pilot 38, needle type N1EF clip positioned in centre. The bike runs runs well but rich and can fowl plugs. The bike is used only for trail riding so mostly on less than half throttle. Any advise would be welcome.

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Old 02-26-2010, 06:53 AM
jostby jostby is offline
Senior Member
Join Date: Oct 2006
Location: Spokane, WA
Posts: 743

check the jetting "sticky". A needle change is most likely needed.

'00 XC250 (mine)
LTS front and rear suspension, power valve cover, carb jet kit and rear chain glide, RB Designs head mod, BRP tall triple clamp, backyard foot-peg lowering conversion.
'04 EC250 (the kids)
(he can do his own mods haha!)
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Old 02-26-2010, 01:50 PM
woody1965's Avatar
woody1965 woody1965 is offline
Join Date: Sep 2009
Location: devizes uk
Posts: 26

i have a 03 and had same problem ..set needle to second from top and air screw at 2.5 turns out runs ok now ..
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