x30 senior

HIGH SPEED NEEDLE : 1 hr 25 to 30 min (see this note regarding X30 needles)
LOW SPEED NEEDLE : 1 hr 5 to 10 mins
EXHAUST TEMP (EGT): High reading: 1,100 F TO 1,150 F (593 C TO 635 C) at 15,000 rpm*, Low reading: 800 F to 850 F (427 C TO 454 C)
CARB POP-OFF PRESSURE: 9 - 10 PSI,  GAUGE SHOULD HOLD BETWEEN 6 - 8 PSI

-standard inlet spring: 37 gram (part#: 24B-299)

-alternate spring (slightly higher pop-off): 42 gram (part#: 24C-298)

FUEL / OIL RATIO: 6.75 OZ / GALLON

OPTIMAL WATER TEMP: 125 F / 51.7 C
SPARK PLUG:

NGK R6252K-105 (SKUSA, USPKS)

NGK BR9EIX (check series rules)

SPARK PLUG GAP: 0.03 IN OR .762 MM

GEARING/RPM: Gear to achieve a top rpm 15,500 to just above 16,000. On shorter, more technical tracks, you will need to gear with a rear sprocket large enough to rev just above 16,000. On tracks with very long straights, you will need to gear with a rear sprocket small enough that you may only be hitting 15,500 - 15,800. 

EGT TUNING: Your high egt reading is very dependent on track/gearing combo and the high rpm you are achieving. If you are at a track where you at or over 16k for any amount of time, your egt’s can spike to over 1,300F (if you are using the new, high speed egt sensor used on the new X30 pipes). To get a consistent feel for a true target egt, you need to look at the egt you achieve at an rpm you reach at every track. We use 15,000. So instead on looking at the highest egt during the lap, I scroll through the lap data to find the egt at 15,000. From our dyno sheets, we know what egt to shoot for maximum power at 15k, and adjust the high needle accordingly (we almost never touch the low needle once it’s set on the dyno).