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Message: [QUOTE="canyncarvr, post: 512403, member: 16552"] re: can't find L1 Needles such as R1173L are kawi proprietary...so you won't necessarily find a keihin direct cross. You have to do some interpolation off the available numbers on either side to get an approximation. As dbd sez...the larger number you're looking at (ie: diameter), the leaner the needle. Basically, if your measured # represents a HOLE (a jet), the larger the richer. If it represents a THING (like needle diameter), the larger the leaner. You might consider JDs tuning guide software. It's available from thumpertalk.com. You can graph needle profiles and AF profiles for up to five different needles. [/QUOTE]