Mz 125 sm big bore

[Mzedian]

Hi just have a question I've got a big bore 180cc kit for my mz got all the bits for the carb aswell so is tuned to run the big bore, just curious to know if I will need to tighten it more than the torque settings to the book indicate as it's a bigger gasket etc or if it should be done to ft
Thanks

[DAVID THOMPSON]

these kits were rare when they came out
so info about them is in short supply and the originals were only 150cc or less
lot of people had a lot of problems with them
and i have had very little info pass by me on them....

hope you have spares to put it back if it goes bad
dave

[Mzedian]

I've got another bike in bits and two spare engines, including brand new piston and barrel for the 125 just thought I'd give the big bore a go see if there's improvement if it fails just resort to the original

[stephendacosta]

Torque specks should remain the same, unless drilled for larger bolts.

[baroquenride]

Is there a way to identify on the outside of the cylinder if one has a big bore kit installed?

[DAVID THOMPSON]

only if the guy that installed it marked the motor as modified

if its running good do not mess it up