Best crank for my Polini.

[Trafficjamz]

Does the polini corsa and a ministroke crank go well together.

Is the SEF crank a better choice?

Or should I just stay with a stock crank.

[bakaracer]

find a stuffer full counter weighted crank. that way it increases case pressure. thats what you want. so a malossi one or sef stock stroke stuffer.

[Trafficjamz]

I have this one that I got from zr50 ghost




Is the scorpion pipe a good match for this crank/bore

[bakaracer]

yeah that will work good. that one has a longer con rod so use a degree wheel to set the duration.

[Trafficjamz]

yeah that will work good. that one has a longer con rod so use a degree wheel to set the duration.

Is the duration is set with extra base gaskets?

Do I need to use polini's metal gaskets.

[kingkamehameha]

Traffic if you use the scorp try polini yellow or blues and a 2k center. It really likes the high revs. Thats a nice crank you got

[bakaracer]

yeah that will work good. that one has a longer con rod so use a degree wheel to set the duration.

Is the duration is set with extra base gaskets?

Do I need to use polini's metal gaskets.

yeah. you will have to get thin gasket paper to make your own. Im not sure if polini has metal base gaskets for the dio. I know they have them for minarelli motors.

[Trafficjamz]

....... It really likes the high revs. Thats a nice crank you got

This is the "suicide" crank I got from ZR

http://www.hondaspree.net/phpBB3/viewto ... =2&t=20165

I had to fix it.......I hope my fix works.

[Trafficjamz]

yeah. you will have to get thin gasket paper to make your own. Im not sure if polini has metal base gaskets for the dio. I know they have them for minarelli motors.

A metal gasket came with the polini kit.

I don't know where to get them individually.

Can the metal ones be stacked like the paper ones?

[bakaracer]

yeah. they are very soft aluminum so they crush nice.

[kingkamehameha]

Ive been reading over jennings two stroke articles and the degree wheel s*** has me real confused. I need to see someone do it in person or make a video.

[Mystic]

I think you can get metal gaskets with different thicknesses from japan.webike

[Trafficjamz]

I think you can get metal gaskets with different thicknesses from japan.webike

Yeah, I have seen those.
Those are much thicker than I need, and the boost port on a polini is not that large.

What I don't understand is, How the con rod is longer , but the displacement stays the same?

why would this crank need extra base gaskets if it is not a ministroke?

[bakaracer]

The stroke is the same but with the longer con rod, it changes the port timing due to rod angle to crank angle.so with a longer rod with the same stroke the port timing will be longer. There is also less stress on the wrist pin and bearing due to less angle on the rod.it also changes blow. Down time because of con rod angle so it stays open a little longer without having to port the cylinder or modifing the ports by adding material

[Trafficjamz]

Will the head or jug need modified the compensate for the jug being raised by extra base gaskets.