A Polini’s torque comes from some wicked intake velocity. Word of caution: don’t go nuts on these if you’re running a 2 petal setup. You can get some power by opening these up. Hookay, If you look at the intake on your cylinder you’ll notice the intake/boost ports are bigger on the cylinder wall than up by where the reed block rests. That said, if you’re ready, this is where things get fun. Intake Porting: A quick word on Polini porting: Don’t start porting if you have no idea what you’re doing. Some highlights.īrass sleeve inserts for a perfect case match and cylinder alignment. Looking back I could have gone a little deeper towards the top of the case (making each trough a little deeper), feel free to.Ĭast Matching 2.0 A couple years after the initial case match I took the cases further. This is going to maximize flow though those transfers and keep your cylinder/piston cooler. Most all of this stuff exists in a thread or blog already, but I thought it’d be nice to compile it in one place.Ĭase Matching: Make sure you cut the top transfers from the Polini ALL the way back into the crankcase.
There’s not much too it, but there are some Polini tips I’ve picked up from Devin at Motion Left Mopeds, Peter, the MA community and a few little things I’ve figured out along the way. There seems to be a lot of nervousness when it comes to building these kits.
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