At SLUK HQ we’ve now got three engines running on SIP’s ignition made by Czech manufacturer Vape. These include a Quattrini Lambretta, Iggy’s PX (although not running at the moment) and now also our Underdog SS90 Vespa which will be used in the 2020 Teesside6 Endurance race.
Vape – what is it?
SIP effectively sell four variations of each kit, given that you can select AC (non-battery) or DC (with battery) and either Road (‘static’ timing) or Sport (variable timing) for each type of ignition.
With so many variations covering so many models (both Vespa and Lambretta) then it’s impossible for SIP to cover everything in the supplied instructions.
With that in mind we have a few additional tips to share for users of the Vape ignition, whether for Vespa or Lambretta.
Let’s share some tips on setting up your ignition
Depending on the specific ignition you have bought, you may choose to strobe the timing with reference to either the flywheel rotor, or to the bolt-on aluminium fan.
SLUK video tip #1
If you choose to use the fan as a timing reference then it is vital to fit the fan in the same one of the six possible positions each time. The video above gives you our SLUK tip to ensure the flywheel and fan are always aligned.
Road or Sport?
The Road and Sport CDIs have different spark timing behaviours as the engine revs rise, and each needs to be strobed at a specific engine rpm.
The Road CDI version is cheaper and offers an almost static timing map over 4,000rpm, similar to the stock CDI on most Vespa and Lambretta Ducati-based ignitions.
SIP Vape video tip #2
The Sport CDI version is more expensive and offers a single fixed advance-retard curve, similar to many of the variable timing systems offered by rivals. Correct setting of the Sport version can help boost low-rpm power on kitted engines.
Go modern with a Buzzwangle
The original SIP supplied instructions tell you how to set the timing using an old-school degree disc. If you want to set the timing more quickly, easily and accurately then we recommend using the Buzzwangle timing kit. The Buzzwangle tool has specific threads to fit both the Vespa and Lambretta SIP ignitions and makes life a lot easier.
SLUK Video Tip #3
In this video we also discuss some specific tips relevant to the Vespa smallframe version; specifically with regards to fixing and modifying the stator base plate, and also making a fixed reference point for strobing. Here we show how to strobe the SIP ignition and how to modify the stator position to obtain the perfect firing point.
What do you think of it so far?
In terms of value for money, these kits are very good; especially considering that they all come with a CNC-machined aluminium fan rather than the cheaper plastic types used by many rivals.
There were some problems on the early batches of the large-frame Vespa versions with the aluminium base plate being too thin and failing but this problem was quickly rectified with a stronger base plate.
Since that time the ignition has gained a good reputation and we are putting our trust in it for the next endurance race.
- Prices are keen for the quality supplied
- Better spark power at low RPM compared to the IDM-based ignitions
- Better lighting output than the rival 4-pole systems
- CNC-machined aluminium fans are a nice touch
- The flywheel rotor is dynamically balanced
- Option of static or variable timing CDIs
- Option of AC or DC regulator/rectifiers
- Uses standard Vespa or Lambretta extractor threads
- The flywheel rotor may be balanced but the fans aren’t
- The fans may be fitted in 6 possible positions.
- The fans are only fixed to the flywheel with 6 Loctited Torx screws. These must be fastened securely to avoid disaster
- Wiring is not simple because the wiring diagrams must be generic as they cover so many different scooter models. A degree of understanding and improvisation is often required
- Wiring connections are not plug-and-play or water-protected like some other modern systems
- Flywheel holding tools are not supplied as standard with the kits.
Text, images and videos: Sticky
Buzzwangles and some ignitions are available through SLUK