CasaPerfomance says:
"This is the HD3 STROKER (heavy duty) 3-speed 50mm LONG STROKE crankshaft, manufactured exclusively for Casa Performance in Italy. It is special crank for all smallframe Lambretta 3-speed Lui 50C/CL, Cento and J125 M3 engine casings. Please note that this will NOT fit 4-speed engine casings.
Made to our design, these race quality plug 'n' play cranks have forged webs, tungsten counter-weights, a forged 'H' profile type conrod, silvered bearing cages and are extremely high quality.
Although primarily designed to be used with the Casa Performance CP One35 135cc cylinder kits, they are also suitable for standard engines as well. For fitting, the Casa Performance HD3 STROKER requires a crankcase boring, see the video beside, and a tiny grind on flywheel side transfer.
Total width of the webs = 36mm
Con rod = 50mm stroke
Small end bearing (supplied) = 16mm
The Casa Performance HD3 STROKER crankshaft gives your CP One35 kit an overall displacement of 141cc and increase torque and powerband! It comes with small end bearing and 1mm cylinder spacer gasket."
Product safety information
Manufacturer information:
Rimini Lambretta Centre
Via delle Industrie 13
47824 Poggio Torriana
Italien
info@riminilambrettacentre.com
https://www.riminilambrettacentre.com