Hey guys, I've been tuning my Ciao for a little bit now trying to get it dialed in and it's getting pretty close and running really well! However, I'm having an issue getting it to go faster than about 32mph on the flats. Here's the setup:
-DR43 lightly case matched, Malossi head w/gasket, ported 13mm intake, opened contact patch (not too big), Mazzu anticipato crank, Gianelli Fire.
-13:13 SHA, 70 or 72 jet (can't remember exactly which atm)
-Points set at .016
-Polini Variator, 6g weights
-Stock Euro clutch with Malossi black springs (2000rpm clutch engagement), aftermarket steel bellhousing
-12.5 : 1 gears in the transmission on Si cross mags
The engine runs good with a steady idle, has good pull throughout the powerband, gets up to speed quickly and can pull pretty decent hills at ok speeds. I feel the variator is tuned pretty spot on as the pipe comes on and pulls right in the beginning of variation and pulls it to full variation plus a few more rpm after that. After that though it's like it hits a wall even though the engine is pretty up there in RPM's. I've messed with the jetting and different weights up and down the range with little difference in top speed (unless of course I tune it too far out in which top speed suffers).
I'm wondering if maybe the transmission gears are the limiting factor here? Or maybe the pipe just can't hang? What are other people with a DR and variators + super low gears pulling for top speed? I've searched the forums and have found other people experiencing the same issues but never a resolution, I really wonder what's causing the issue.
Any Vespa gurus have some sage advice? (edited)