morbin

Oh yes, I'd be out of law anyway, but at least they would not hear me so clearly! and Polini cylinder is not different from the standard cylinder to an unexperienced eye... Ok so 28 makes more noise than 24, and then I'll go for the 24. And already thought about standard Sito, with this one Polini should sound a little more ... Did you work the valve on your DR? 4+4? Does the Sito + give something more than Standard Sito?

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Thanks a lot Max. Good suggestion I used to run a Polini 177 with worb5 crank and RZ Right but it was too noisy! It run excellent but expecially overhere in Italy, where it is not possible to make it streetlegal, I felt too much out of the low... And so now I decided to go back to the valve. Did you prefer the 24SI or the 28? How was it on fuel consumption? Which had better low end torque? Gruss, Matt

Do you all go with 19mm cut on the crank and 4+4 millimeters on the valve?

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Thank Niko! Anyone with suggestions for nOT-vOT?

Hi all, I'm collecting some information about modifications for my Polini 177. It is gonna be a valve inlet engine, standard stroke, 20mm cut crank, casing lightly adjusted, probably GS piston, GSF Kopf and modified exhaust... I found this file, I know what inlet valve duration is, but I have difficulties understanding German. How does this engine behave? Could anyone tell me which is a good inlet valve duration for my setup? I read around that I should not exceed 60°-65° nOT (I think I better keep closer to 60°), what can you tell me about the vOT side? I'd like it for sport-touring with balanced low end power and high power and rather cheap on gas... Carb will be a 24 SI (would ovalizing it be any good?) and standard exhaust. Gruss Matt index.pdf index.pdf

awesome! cheers