Join Date: Jan 2019
Location: petone new zealand
The kit I got was a stage 7 which has a wide range of tuning. The instructions are easy to follow. The settings are not going to be the same for everyone, altitude, makes a big difference, also air pressure and humidity so you may have to play around with the air screw to smooth out the idle ( mines at 3 1/4 turns out) And the needle may need lifted or dropped a 1/2 clip to richen or lean out the fuel mixture. make sure the inlet manifolds are properly sealed to the engine. Make sure the slide vacuum rubbers are correctly placed in their allocated grooves, slide up freely and return smoothly. Use a little silicon grease around the edge of the vacuum it may help. Make sure your carbs and jets are all clean and your float levels are set to standard. Make sure your carbs are balanced, you can do this by eye watching the butterfly’s open and close and adjust the balance screw, but a better job with vac gauges. Make sure your compression is good, valve clearances are correct, you have fresh fuel.
The dynojet needles have a more aggressive taper, and also are adjustable so I wouldn’t try any modifications with stock needles. The slide hole is drilled out to 3.1mm and the softer springs makes it easier for the vacuum to lift the slide. There are a number of main jet sizes to then fine tune the full open fueling which will depend on your air filter and exhaust. The trouble shooting document that comes with the kit is really helpful for getting your head around what you need to adjust to iron out any running issues. And once you have the air box off it’s way easier to work on the carbs.