Needles
The needles that come in the G-G are rated differently than the standard Kehien needles. As it seems you may know, the last letter signifies the straight portion diameter. C= 2.67 The "1E" part is 1/2 clip different than am "0Z", but to be honest I forgot if its richer or leaner. These also describe the taper, which is a triple taper needle. If you want to go to a different type of Kehien needle, try a 1467 series needle. You can adjust the clip range by going with a "N", "J" at the end of the numbers. Sudco makes a chart that describes the normal needle numbers (1367, 1467 etc.)and it also has a cross reference to its other designations, such as "DEG", which would be the same as a 1467. But the last I looked, it did not list the new triple taper needles. But if you choose the 14 series needle, you'll have to richen the pilot and/or richen the slide because the initial step on the straight portion starts further down the needle, thus being much leaner on the bottom. Normally, the N1ED needle on other bikes can pull a main jet down in the 160-168 range because of the steep taper of the needle, but it seems the G-G will pull a richer main jet, so if you do go to a 14 series needle, you may not have to change the main. You can also get the "N" series needles from either Suzuki or from Kawasaki. I know the 97 RM250 ran a N1ED needle standard, so they should list the richer and leaner ones as well. Hope this helps.