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Dirt Bike Brands - Other
Help taming the 300's power delivery
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[QUOTE="fishhead, post: 269711, member: 18565"] Strick, Absolutly. The slide cut-away interacts with the straight section dia. and pilot circuit to a lesser degree. On my kdx I found this interaction to be roughly one whole number designation on the cut-away = one letter desination on the straight section diameter. I repeat ROUGHLY as there are interactions with the clip positions and pilot circuit so this won't hold perfectly true but results will be clustered in this area. There are some advantages to be had running a 7 slide and richer needles in many applications. It might be ineresting to try a 5 slide and a larger straight section needle with a longer taper to obtain the desired results. Taming the 300 down. All guides and advice are just that and are subject to field verification hence the need for seat of the pants testing. Most small bore bikes 125's and 200's prefer the d taper some 250' prefer the d taper and others prefer the c taper and a lot of guys prefer the g length needle on the 380's. 300's seem to fall in between with some liking g length and most preferring e length needles. The subject of pilot jets is another story. Some can use fat pilots as a way to cool the combustion chamber down after a hard run. In the woods this can equal fouled plugs even when the straight section diameter appers to be balanced. Others accomplish similar results by using a very rich straight section and a fairly lean pilot if they spend little time below 1/4 throttle. It appers to me that most jetting packages that stray a good distance away from median or standard baselines are trying to address a specific problem which is very important to the application and perhaps unusual. An example would be a 400 aircooled Maico roadracing in Open GP trailbike.:eek: [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Help taming the 300's power delivery
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