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


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  #11  
Old 08-28-2007, 04:13 PM
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I went ahead and ordered a #8 slide because it can't hurt to have it around anyway. Report to follow after it is installed.


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  #12  
Old 08-29-2007, 01:07 PM
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Look forward to hearing how you get on with the number 8 slide, I've been having very similar issues with the LT kit. It's damn near perfect but I'd like to know if the 8 slide cures those little niggles.
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Old 08-29-2007, 06:43 PM
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LMAO!! Yea those "little niggles" need to go away!
It makes sense the #8 slide would work because it's just at the crack of the throttle that the, in my words, "raspy hesitation" crops up. I've never had to change a slide before to get perfect carburetion, but there's always a first.
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Old 08-29-2007, 08:36 PM
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That hesitation with the 42 pilot LTR needle#2 178 main is caused by being too lean on the needle straight section diameter. Going to a #8 slide will only make it worse. Go back to the #3 clip with the 42 pilot and 175 main and it will work better. Even in the #3 clip the LTR needle is border line lean at off idle at sea level 70 degrees so don't run the air screw out too far. Other options are CCK#3 for a very smooth power band or a N3EG#3 with a 175 main for a stronger mid to top pull. These are sea level settings at 70 degrees F. oil mixed at 40:1 pump gas 91 octane. If you want really clean and crisp jetting, you need to have the cylinder head cut to reduce the squish and get a cleaner burn. Otherwise the jetting will always be a little dirty in hot weather no matter how you jet it. Dave

Last edited by pobit; 09-07-2007 at 10:50 PM.
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  #15  
Old 08-29-2007, 09:15 PM
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cck#3 is a type of needle??
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  #16  
Old 08-29-2007, 11:19 PM
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jimbolaya, try what POBIT says before anything else, he is pretty damn good at this stuff, and the advice he gave you is very good... ( Just my 2 cents )
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Old 08-30-2007, 06:17 AM
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I will certainly check it out. thanks!
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  #18  
Old 08-30-2007, 07:46 AM
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Yes, try it, should tell you if your roughness is rich or lean. There all different. My '07 runs awesome on what would foul my '03. And yes, have RBD cut the head. RBD also does carb mods that have excellent reviews. I beleive he cuts the slide to an #8 and works from there as part of the package.

The latest LTR needles should be richer in the straight section than previous that were indeed lean.
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  #19  
Old 08-30-2007, 10:22 AM
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[QUOTE=GMP
The latest LTR needles should be richer in the straight section than previous that were indeed lean.[/QUOTE]

The LTR needles I have are sold as -0 needles and measure 2.66mm in diameter. This needle in my 06 300 was lean in the #3 clip 42 pilot and caused the bike too hit too hard at off idle causing excessive wheel spin. The other two needles I mentioned have a softer off idle hit that works better for picking your way through rocks or roots. The CCK is mellow throughout the entire power band and the N3EG gives the bike a more motcross like feel with a healthy mid range hit and a nice over rev if you use a 175 main. Keep in mind I have the DE ignition on my bike so it is more responsive to leaner jetting. The LTR needle may work fine at off idle with the heavier EC ignition as the heavier flywheel will have a dampening effect on throttle response. I do think the heavier ignition would benifit from the N3EG needle to help the slower reving motor spin up faster. Dave

Last edited by pobit; 09-07-2007 at 10:52 PM.
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  #20  
Old 08-30-2007, 11:48 AM
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Something doesn't add up. Dave, your LTR needle measured 2.66mm on the straight dia.? That would make it richer than the CCK (K=2.695mm). If you were lean off idle with the LTR needle I would think that the CCK would make things worse all else being equal.

300s are tougher to get perfect plus I think you tend to ride them at lower throttle openings, making those adjustments more critical.

What effect does your ignition map switch have on this? Did you jet for one position or the other?
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