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I've got rejetted carbs and Fly Racing air filters installed and was wondering if my 98 xpl ran at 3/4 throttle for a long period of time (15 minutes) would the 3/4 lean spot cause me to have engine Failure? Is this 3/4 throttle lean spot as serious as people make it out to be?
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Re: 951 lean out 3/4 throttle with After Market Air Filters
Yes its true.
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Re: 951 lean out 3/4 throttle with After Market Air Filters
I agree, true. But it seems that some do it and some dont. Mine did it bone stock. I sinse have done some carb massaging which improves signal strength and it has been fine to where I can cruise at any throttle range indefinatley.Being ignorant, is not so much ashame as being unwilling to learn. Benjamin FranklinComment
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Re: 951 lean out 3/4 throttle with After Market Air Filters
Any Idea on how to make This 3/4 throttle lean spot better? Stock air filters and Stock Jetts the answer?Comment
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Re: 951 lean out 3/4 throttle with After Market Air Filters
Newberry SC huh, your about 2 hours away from me.
Yes there is a way to "lighten" it a bit. Go to www.watercraftmagic.com and order a jet kit and prok filters from Bill O'neil.
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Re: 951 lean out 3/4 throttle with After Market Air Filters
A different jetting profile helps some, but loss signal is loss of signal. The stock carbs have an inner venturi that is very blunt, this will divert an amount of air around the "bomb sight". Changing the shape of the inner venturi can help send more air thru the center of the "bomb sight" netting better velocity past the high speed circuit and improved signal. I have tested on my makeshift flow bench, and massaging the venturi did improve the pull on the high speed circuit, but a flow bench dosent replicate the unsteady flow or the resonance of a running engine.Originally posted by carolinadocks
Another mod was to remove the pilot jet and drill a .030 hole into the carb. While that improved off idle carburation, I didnt seem to be able to get a clean idle, so I have sinse filled that in.
Like I mentioned before some machines dont seem to be affected as much as others.Being ignorant, is not so much ashame as being unwilling to learn. Benjamin FranklinComment
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