Derestriction Questions

[McScooterson]

As some of you know, I have a Piaggio Purejet SR50. I have a question
regarding the variator derestriction.

When the vario spacer is in, the bike will rev at 9.5k RPM, and go ~30MPH.

When the vario ring is removed, the bike will lose 1500 RPM and rev to 8k, but
the speed increase to ~50MPH.

I don't understand this completely. Where did the 1500 RPM's go? Is it possible
to get them back, and gain more speed?


Also, there is a metal plate in between the manifold and reedblock. Is this a restrictor,
or does it have another function?

 

[K-1]

Did you get new, lighter rollers in your vario? Something like .5 - 1g lighter should do the trick.

If the metal plate blocks the space between the holes of the manifold and the reeds then it is a restrictor, if it doesn't - then it aint one. Take it apart and see for yourself - I personally haven't had any contact with these injection engines so I don't know where the restrictors (besides the ECU and the vario) are..

 

[tiba_karotsu]

you lost the revs b'coz you are now shifting into high gear (overdrive) with the ring out, just lighten up the rollers a bit & you'll see your revs increase & top speed go up.

 

[McScooterson]

Nice, Thank you!

 

[McScooterson]

Thanks guys. I will look into these things.