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Enduro Intake/Carburetion - 2 stroke Jetting, Reeds, Air Filters, etc. |
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#1
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Jetting confusion
My bike started acting funny last weekend while riding at a different elevation (4k) than normal (2k). When I would let off the throttle it felt like the engine was actively trying to shut off on me. Give it a bit of throttle and it would come back. I have never played with the jetting of this bike since I bought it since it seemed to run fairly well with a bit of spooge. Here is what I have...
'04 DE250 engine PWK38AS (with a half-assed attempt by someone to emulate RB's divider only done with sheet metal and what looks like JB Weld epoxy - has been removed) 165 main 40 pj 2.25 turns out idle mix ??? needle - top clip (gold in color - I literally can see no markings on it whatsoever) BR8ES plug - black at the base (pic below) So, I cannot even begin to figure out where I'm at with out being able to identify the needle. I do have an older 38mm PWK off of my old KDX250 which has an R1369N needle I can use. If I got it right, that crosses over to a N427-48CGK. Do you guys think it would be safe to start with this needle, and if so, what clip should I start out at? Will be riding again at 4k tomorrow and really need to get this back together.
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WildAzzRacing YouTube channel Trail Riders of Southern AZ club AZ State Parks OHV Ambassador '11 EC250R '98 KDX220 |
#2
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Well, guess I'll be giving it a shot tomorrow. Installed it at the middle position and installed a new plug. Hope it goes well!
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WildAzzRacing YouTube channel Trail Riders of Southern AZ club AZ State Parks OHV Ambassador '11 EC250R '98 KDX220 |
#3
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Well, put about 35 miles on it yesterday. Mid range felt strong put it was trying to cut out up top. Bottom end felt weaker and by the end of the day when I would come to a stop the bike would die. It would start right back up at least.
Current setup is now... 165 main 40 pj CGK needle - middle clip 1.5 turns air screw Thinking about going to a 170-172 main based off of AZRickD's jetting in the jetting guide. Normally ride 2000-2500ft but on occasion ride at 4000ft. Should I change out the pj and needle as well? Thoughts?
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WildAzzRacing YouTube channel Trail Riders of Southern AZ club AZ State Parks OHV Ambassador '11 EC250R '98 KDX220 |
#4
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Quote:
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#5
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The Plug in the pic looks very weird indeed.. totally different to the BR8ES plugs ive run forever.
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#6
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Quote:
Don't have any suggestions re thread as I'm unfamiliar with the older engines, AS1 carbs, and the Sudco needles. I would however agree the main looks quite lean for a 250. |
#7
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Sarcasm indeed. can see the marks where he cut it. :P
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#8
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Thought as much
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#9
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That's what I was thinking as well. Probably pick up a 170 and 172 and see how the plug looks then.
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WildAzzRacing YouTube channel Trail Riders of Southern AZ club AZ State Parks OHV Ambassador '11 EC250R '98 KDX220 |
#10
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Try a n3eg needle
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03 ec300 honda cr500 94 |
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