MZ/MuZ Riders

hello i am brand new here but i have ridden my mz 125 sm and have just recently gotten my a2 (means i can ride bigger bikes than 125cc) but i saw someone recently posted about him getting a 180 big bore and was just wondering where and what websites can i find pistons that can give my bike some more ccs
am frow sweden if that helps so if you know any sites that ship to sweden please do lte me know

big bore kits did not work out
dave

will send you a personal message

Hej!

Sorry i dont understand the answer, here are my two cents why i think 180 cc Big Bore Kits work out very nice!

First: It has to be done in a good way.

1. Originally the engine was planed 125-200 ccm. Means The gearbox can take the torque,
and i see out of the rpm that the 6th gear can do more with more ccm.

2. In Germany we have at least two supplier offering the Big bore kit. It was succesfully used in the racing teams, for many years.
Take a look for Mr. Faber in MZ-Faber.de or for Mr. Schuller in racing-shop-schuller.de

3. Important is to have a new connecting rod from PROX with a roller bearing wich is recommened for 125 cc long life and of course for more power in case of 180cc.
That means in origninal is a sliding bearing, those simetimes wore out.

4. New timing chain in best quality DID

5. 1,5 mm Aluminum sealing kit under the head because of the longer connecting rod. With the 1,5 mm more height there will be never a problem with the oil channel beside the timing chain!

Happy to read you opinion.
Best!
kiu

PS: Thats my best knowledge and the minimum to do, ask the two guys and learn more...

at the present time best to leave it as it came from factory and ride it
where i live its only of value if it runs good as a DAILY DRIVER
as any major repairs will KILL YOUR POCKET BOOK