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TOPIC: Re:Engine Knocking
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Re:Engine Knocking 3 Years, 4 Months ago
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javawave wrote:
DocShadow wrote:
2wheels wrote:
Main is DJ175
Needle is DN0977
air mixture scew is 3 turn out
At sea level this would not be a rich setting for the DJ setup.
Check your choke knob ... it may been to be trimmed.
Doc
Is there something in the jetting that could be making his bike go flat at 70 mph?
The main is the primary jet controlling fuel at higher rpm, so it's most likely the main ... it's a bit too small. For the DJ, 180/185 is more commonly run.
BTW .... he should read the Wide Open Throttle test outlined in the Tech Articles section to determine if his main if OK.
Doc
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Last Edit: 2009/01/25 10:03 By DocShadow.
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Re:Engine Knocking 3 Years, 4 Months ago
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Even with a stock air box?
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\\\\\\\\\\\\\\\"A mind full of judgment has little room for wisdom\\\\\\\\\\\\\\\"
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Re:Engine Knocking 3 Years, 4 Months ago
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javawave wrote:
Even with a stock air box?
I edited my post as you replied 
One does not start changing out jets randomly. 
Folks should start with the WOT test to check the main and the move on to the Needle and PMS settings.
One thing at a time ... slow and sure.
Doc
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2wheels (User)
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Re:Engine Knocking 3 Years, 4 Months ago
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I was simply following D J's jetting recommendation.
Ive jetted many bikes; most of them however have been single cylinder dirtbikes.
BTW the main jet was a dJ200; not a 175. sorry for the error.
I am aware of the wide open test for the main, Ive just been hesitant to due this do to all the engine noise. I wasnt sure if the motor would respond well to hard riding, cause I ony have about 1200 miles on the engine. |
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2wheels (User)
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Re:Engine Knocking 3 Years, 4 Months ago
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This might sound like a stupid question; bet what exactly is meant when u say I might have to trim the chocke knob
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Re:Engine Knocking 3 Years, 4 Months ago
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Re:Engine Knocking 3 Years, 4 Months ago
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2wheels wrote:
I was simply following D J's jetting recommendation.
Ive jetted many bikes; most of them however have been single cylinder dirtbikes.
BTW the main jet was a dJ200; not a 175. sorry for the error.
I am aware of the wide open test for the main, Ive just been hesitant to due this do to all the engine noise. I wasnt sure if the motor would respond well to hard riding, cause I ony have about 1200 miles on the engine.
A DJ200 is too rich and would explain any black smoke or sooting you are getting.
You can ride it hard now .. the rev limiter is your friend. 
Doc
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Re:Engine Knocking 3 Years, 4 Months ago
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glad to see the gurus are on it for you 2wheels.  |
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2wheels (User)
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Re:Engine Knocking 3 Years, 4 Months ago
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I'm not seeing any black smoke are anything else of that nature, but this could be due to the fact that I've simply be unable to ride much do to the cold weather. Since rejetting the bike, Ive only had the chance to put about 100 miles on it. I was thinking of a high flow air filter of some type' any recomendations????
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