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Oil Spooge - Fine Tuning
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Posted by: SRigas---------------------
I know that a little spooge is to be expected from a two stroke bike, but I would like to ask your opinion. When I run a ratio of 40:1 I get spooge at the end of the arrestor. If I run 50:1 the end of the arrestor looks fairly spooge free. Is the excess oil a result primarily of the pilot, main jet, needle setting or all three? The plug checks out fine at both ratios. I would prefer to run 32:1 or 40:1. Just fine tuning.
Posted by: OLD-N-SLOW---------------------
Spooge is a result of poor jetting and not related to oil mix ratio. You did not
say what bike and year you have so I will refer you to http://justkdx.dirtrider.net for help with starting you jetting process.
When your done there try the Emergency rb carb mod jetting thread
and read every post.READ EVERY POST. I think it is important to read this till it makes some sense to you. Then you have an idea what your bike is telling you. Some very hard and tiresome testing has been done for you on this thread and if you read everyone you may understand.
I bet I have read it at least ten times and each time come away saying
" boy, that guys smart". Sorry to run on but there is to much of an improvement to ignore your jetting. And by the way , spooge will no longer be a problem.
Steve
Posted by: dirt bike dave---------------------
Let' s see if I understand: The most important thing is to eliminate spooge, as that means the bike is properly jetted. Okay...
On rides in the mountains, my elevation can vary by over 4,000 feet, temps can vary over 30 degrees F, and changing weather can cause big changes in humidity and barometric pressure over a 6+ hour period.
If I jet for no spooge when crawling through the rocks at 9:00 am at 6,000 feet and 45 degrees F, high humdity and low pressure, I'll be way too lean when I'm hauling back to my truck in the afernoon, WFO at 2,000 feet and 75 degrees F, low humdity and rising barometer.
I do what many do: I jet for the likely conditions that will require the richest jetting, and wipe a little bit of spooge off the next day. If I'm generating the spooge when rock crawling and the bike has excess power for that situation anyway, I can live with a little spooge in exchange for a safety margin.
Posted by: OLD-N-SLOW---------------------
DBD,
I reread my post, and I am baffled by your response. I never said or meant to imply that you adjust your jetting till you get no spooge.
I meant that excess spooge is a product of overrich jetting and not
fuel/oil mixture. Also, obviously, one jetting setting cannot cover all possible
variable changes. If you jet the best you can, the excess spooge problem
will go away on its own.
SRigas,
I am sorry if I misled you. I hope this clears things up
Steve
Posted by: SRigas---------------------
I've changed jets a lot, but I can never seem to lean the bike out in regards to the pilot jet. I'm running a 38 pilot, but I still have to turn the air screw out 3 1/2 turns or so to affect the idle. Am I going the wrong way with the pilot? The bike runs well and doesn't bog or anything. I have a 2001 KDX 200 with a procircuit pipe and arrestor.
Posted by: OLD-N-SLOW---------------------
Try to adjust the air screw for best throttle response at low speed.
0-1/4 throttle position. My current jetting with 01kdx200 kg30 is
38-152 cgl needle at#4 clip position and air screw around 3 out.
I have heard of air screw setting as low as 1/2 out. So set yours for best response and dont be worried that it dosnt match others settings.
My bike does 4-stroke some at steady speed and low throttle pos. I might try a 35 pilot to see if that helps.
You could also try to see if it helps and always go back if it seems worse.
The cgl needle made a big difference for me, but as you say, your bike runs
good now. The good thing about carb changes is that if it dosnt work
you can always go back to the high ground and go another direction.
Kinda fun actually
Steve
Posted by: SRigas---------------------
Is there a compensation method to effectively lower the pilot jet effects if you don't have a leaner pilot jet? I have a 38, but no 35. In other words can you change the needle height to effect the pilot jet and air screw setting?
Posted by: OLD-N-SLOW---------------------
I supose you could try lowering the needle (raising the clip), but this may make you lean in the mid range, revealing itself when wicking the throttle as
a bog. But it never hurts to try! Also a larger dia. needle would help some if
you have one.
Steve
Posted by: dirt bike dave---------------------
Old - N - Slo - Sorry if I came off a little harsh. Every so often the anti-spooge police come around and proclaim that if your bike shows any spooge at all your jetting is too rich.
Regarding pilot jets, the general rule is if you are over 2 turns out on the air screw, you should be running the next smaller pilot.
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