Converting a lui 50 to lui 75 specification - with dyno testing of Casa's 80 cc and CP's ONE05 kits

The lui range is not just a ground-breaking design, it is also a hell lot of fun to ride. At least as long as the engine is not to original specs. The original 50 cc engine is a pain with 1.5 hp at the crankshaft and a top speed said to be 38.5 km/h / 24 mph.

Compared to the lui 50 the 75 models are a much more grown up affair. The big headlight unit with hi and low beam, a rear brake light and other features make it look much more grown up. And also work so.

Thanks to the hype and craze about the lui range probably started with the first Lui Dolomiti Experience the spare and tuning part situation is better than ever. And you can easily turn your 50 into the specs of the 75 one.

For more details here is the model history for both models in one link:

We started a wish list with the major components to carry the conversion out:

Also in this listing is the new Casa Lambretta 80 cc kit. We did something on that before ->

Neuer CASA LAMBRETTA 80 ccm Zylinder für lui und J50 ersetzt den 75 ccm X3 Blog SC

DYNO

Finally, we had it on the dyno with the SH20 original carb, airfilter box and the lui 75 original exhaust. The SH20 was jetted like this for best performance and reliability:

Main jet:             65
Idle jet:                48
Atomizer:            5899-5

A very good result with the Innocenti prototype turned into reality by Casa Lambretta. Especially considering this test earlier with the 75 cc cylinder kit give a maximum of 4.9 hp at the rear wheel. At here we have on a fresh -not settled in- engine and kit 5.5 hp straight away.

If you fancy more power on a 50 cc or 75 cc lui engine the Casa Performance ONE05 kit is the way to go. We also tested it with on the lui 75 with original exhaust and the SH20 carb.

With the standard 75 air filter box the jetting of the SH20 was:

Main jet: 76
Idle jet: 45
Atomizer: 5899-5