Motronic M30b35 flywheel weight?

[eugeman]

Any idea how much the stock one weighs, and how much it can be shaved (safely) to reduce the weight?

[Lurker27]

The later version off my donor was the dual mass unit - over 30 lbs IIRC

[eugeman]

How rare are the lighter weight flywheels from an e28 533i, and what do they weigh? What is the going price if I can find one?

[wildstoats]

533 flywheels are around 15 pounds. Compared to around 22-23 for the stock e28 flywheel. Finding one is the real trick. Another option (the one I opted for) was to send it out and have it surfaced and lightened. Cost me $200 total including shipping. Weight went down to around 16-17 pounds. I forgot to take pictures before I put the whole thing together but they did a great job.

[Lurker27]

My 533i flywheel + resurface + lightening+shipping was $185 total. Hope that helps.

[mooseheadm5]

Call your local machine shop. We used one where I used to work that would lighten and resurface for under $100. They brought a 325e single mass flywheel down to 13lb IIRC.