March 2020 Update
We are currently working on a couple of scooter projects - a Vespa PX LC 200cc and a SP Lambretta Trike 250cc (full design & build).
We at SP Developments Ltd are always working designs and parts for 2 stroke engines.
We have now brought a CNC Lathe and Milling machine along with a surface grinder, this decision was taken so that we can better cater for our part requirements to provide a value sevice for our customers.
After speaking to you the scooterist we first started working on upgrading the CC of the SP engines to 190cc from 172cc (after 5 years of runing this engine), this was achieved with a test engine and good results.
Since then we have looked at the 2 stroke scooter market which is ever changing and clearly at a fast pace, the engineering decsion was taken to produce 250cc engines now which 10 off engines are currently being machined here in Barwell UK.
SP Developments
SP Developments: Recent Progress
SP Lambretta
Within the last year we have been developing the new ecu and continually updating the software for the running of the twin fuel/oil injection system. We are currently up to 450+ power runs on dyno and over 1000 road miles.
We are still running the 172cc 4 speed which is giving good level of performance and speed up to 8500rpm.
New inlet manifold has been cast for secondary injection over 5000 rpm and is fitted to 172cc.
New gearbox endplate casting in readiness of the SP 5 speed gearbox currently being machined in the UK.
Awaiting SP engine casings to come back from machining in the UK.
The engine will be now 190cc (old 172cc) as a base unit as the same as the Vespa LC (65 x 57) bore and stroke.
New crankshaft and flywheel have been designed and are being manufactured for testing at new level cc.
SP Vespa
Now proven out as a test engine 190cc LC with V force 4 reed and 30mm Delortto carb.
New Head and exhaust fitted with good power return.
New adjustible front forks and Hydraulic brakes fitted.
Coming soon
2 Lambretta S3 demonstrators are currently being built to allow customers to experience the ride.
Lambretta YZ250 YPVS LC (I built in early 90's) will have a new SP 5 speed engine casing and put back on the road.
Phase 2 Engine Castings Received
The first 15 phase two engine castings have been received which has been improved so that the 5 speed 9mm width gears can be used.
Please keep checking back for more updates in the coming weeks and months!
Grand Prix 180i Featured in Scootering Magazine
SP developments Grand Prix 180i engine has been featured in the October edition of Scootering magazine as it nears production. The article is below and full size image can be found in the gallery:
