Scooterotica

Li150 Spanish casing with a Mugello 186,Dellorto Phbl 25 and ancillotti exhaust. 16/46 gearing. What size crank would be best in this set up and who does the best quality?

Read this, it might help with deciding what crank to choose.
https://www.mbscooters.co.uk/info/mb-*- ... ts+89.html
The MEC 60x110 might need the casings trenched as the big end eye can sit proud of the webs.

I have a series 2 with an Li 125 case,it has a Casa 185 top end with an Li 150 box and 16x46 sprockets and a PHBL 25 carb with an Ancillotti exhaust.I use a MEC 58x107 GP type crank and bearings and it runs great.

You can spend a lot of money on cranks, and someone will have twisted every single one of them at some point.

Your Muggello won't break many records, so no need to break the bank, any decent standard quality 'race' crank will be suitable. the MEC (shimmed big end) ones are good value and have good webs as do the SIL ones which have had the big end and rod replaced.

If you want to spend a bit more the BGM is a decent midrange crank.

As above, MEC are highly regarded..

i have heard lots of good things about the grandturismo cranks, they have plastic inserts to balance them out.