Modern Vespa

Hey gang,

Anyone else install one of these?

I put mine in the other day on my 2020 Sei Giorni HPE.

Cables are all hooked up correctly, however when I follow the calibration steps for the life of me I can't get it to follow the actions in the book.

I can only get an M0, for Map 0, which it is set to. I can't seem to get all the lights and the OK when I turn it on which the manual says should happen.

Is that map pot/dial meant to be set to something else when I start it up? The instructions don't mention the setting there and it comes set at 0.

Am I doing something wrong? The Vespa does start up and it does run. I've followed the low and high calibration steps, I just can't get the lights to do what the book says they should do.

iirc Mike had the Forcemaster 2 and tried it in pre-HPE but gave up and removed it ...

he might have some advice anyway


(hope Mike doesn't mind me tagging him)

This is what I've got.

is this the same manual that came with it?

https://eamalossistore.blob.core.windows.net/files/montaggio/pdm/7318992.pdf

(link taken from https://www.malossistore.asia/en/force-master-3-electronic-controller-for-injection-vehicles-vespa-gts-hpe-300-ie-4t-lc-euro-4-2019-2020-ma36m-5518992-vehpe30019-M-P)

That one is significantly different than the one that came with it.

It does not appear to contain the steps I am having trouble with.

I'll try the steps in the manual you provided and see how it goes.

Thanks a lot!

Okay, it seems that the forcemaster 3 follows the behavior exactly as the pdf from the website describes, and not how it is described in the physical copy!

Thanks for the link! Thankfully, it appears the installation matches, and it's a few steps that have been eliminated in the calibration which makes the whole thing simpler.

What is the part number that came on the box?

I'll be interested in your performance results. I found I could easily mess up my scooter's performance with the Forcemaster 2, but I couldn't get any noticeable improvement. Perhaps one needs a dyno to set it up properly.

If You have problems with it, don't bother trying to get help from Malossi or SIP - total waste of time.

M5518480 also on the physical copy

pdf says M5518992.

Sticker on the back of the forcemaster says 5518481

reading on the german forums it seems to only give noticeable improvement if using a wideband lambda during adjustment.

I'm just following the map modifications table. Right now it's on 1, but when I get the cylinder installed I'll set it to 4.

installing the cylinder - nice The Forcemaster will help you then

Yes, I'm getting the cylinder and the upgear installed. Those mods are beyond my skill and resources to complete, but I figured I could get the forcemaster installed myself before that work is completed.

Then I'll really be able to really see how all that works out on my ride to Flagstaff this summer for Amerivespa.

Evidence? Any dyno charts? I am skeptical!

Malossi published dyno results for the V4, but I haven't seen any for any of their other products.

I'm thinking you'd also wanna do the camshaft

https://www.malossistore.asia/en/power-cam-camshaft-vespa-gts-hpe-300-ie-4t-lc-euro-4-2019-2020-ma36m-5919264-vehpe30019-M-P