swaping a sil flywheel for a original af one timing?

[cezeta]

im not happy with my temperary mugello 225 set up but need to ride to france on it so was thinking of adding a bit of life with a lightened flywheel.

im stuck for time so swapping a sil flywheel for a original af one will i need to alter the timing?

[rakki]

I think that both setups should be run with same advance. As you can't be sure if both flywheels have the keyholes in exactly same place you should check after swap that timing haven't changed.

[cezeta]

thats what i was thinking but hoping not to be true.......ill pull my head out of the sand and get the indian one lightened as it will be the better flywheel anyway

[J1MS]

You could just dead stop the engine to find TDC with the new flywheel then check your existing marks and adjust the stator position if necessary.... about half an hours work if the scooter is up on a bench....

[cezeta]

thanks jims, i was dithering between the two flywheels and had half an hour to spare so was hoping for an easy option but ive spent the day working on the mrs vespa so both scoots are now in the van ready for an mot in the morning.

ill have a tinker once they are legal

[dodobeckam]

its just a straight swap,done one last week

[cezeta]

its just a straight swap,done one last week

did you check the timing?

[dodobeckam]

spoke to af and they say straight swap................mike

[cezeta]

ok, handy to know. i dont mind re strobing but not for just testing to see which works the best. i know some others are way out, i think they are the api originated ones.

[bazman]

I would strobe to check, as i changed my sil flywheel for a lightened one i had (sil again) and was well off the timing marks.