Before I share a full BMW Airhead engine rebuild, I thought it would be a good idea to share the front main bearing removal and assembly process. This has to be one of the most complicated bearing installs I've seen up until this day...but at the end of the day, I got it done without any issues.

If you would like to do this on your own BMW motorcycle, be prepared to pick up a couple tools that I listed down below. Maybe not all these tools are needed, but I would highly suggest you pick up the correct drills and reamers for this task!

The BMW R60/5 engine has some really nice features and I think this main bearing retainer just shows you how well the German engineers thought this through. Not only does this part hold the crankshaft in place, but it allows oil to pass through and at the same time there is an integrated pin for the chain tensioner. Amazing, in my opinion!

With this part done I can now get some other engine parts ready for the major assembly. To be continued...

If this video was helpful in any way, I'd appreciate it if you hit that like button and if you want to be one of the first to see the assembly video, be sure to subscribe!

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Products in this video:
BMW (Red-60mm) Main Bearings: http://bit.ly/3WqgvXb

Tools in this video:
Handcrank Drill: https://amzn.to/3WVwbBJ
3.99mm Drill (0.157"): https://amzn.to/3Wqghzj
3.50mm Drill (0.137"): https://amzn.to/3CbT1gt
3.20mm Drill: https://amzn.to/3GthznN
4H8 Reamer: https://amzn.to/3Ib7ux1
Bearing Remover Kit: https://amzn.to/3i181a6
Loctite/Permatex: https://amzn.to/3Boxj7B
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Similar Motorcycles: BMW R50/5, BMW R60/5, BMW R75/5, BMW R75/6, BMW R100/6, BMW R75/7, BMW R100/7

Watch My Previous Rebuilds:
𝐁𝐌𝐖 𝐑𝟔𝟎/𝟓 𝐌𝐨𝐭𝐨𝐫𝐜𝐲𝐜𝐥𝐞 𝐏𝐫𝐨𝐣𝐞𝐜𝐭: https://bit.ly/3uJVXOn
𝐉𝐨𝐡𝐧 𝐃𝐞𝐞𝐫𝐞 4𝟎𝟎: https://bit.ly/3unVNfg
𝐉𝐨𝐡𝐧 𝐃𝐞𝐞𝐫𝐞 𝟑𝟎𝟎:https://bit.ly/3BbuWDz
𝐉𝐨𝐡𝐧 𝐃𝐞𝐞𝐫𝐞 𝟑𝟏𝟕:https://bit.ly/3wHy2x5
𝗕𝗼𝗹𝗲𝗻𝘀 𝗛𝗧𝟮𝟬 𝗣𝗿𝗼𝗷𝗲𝗰𝘁: http://bit.ly/2NOLvlp
𝗔𝗹𝗹𝗶𝘀 𝗖𝗵𝗮𝗹𝗺𝗲𝗿𝘀 𝐂/𝐁 𝗧𝗿𝗮𝗰𝘁𝗼𝗿: http://bit.ly/3bvXLzd
𝗧𝗵𝗼𝗺𝗮𝘀 𝗛𝗟𝟭𝟳𝟯 𝗦𝗸𝗶𝗱 𝗦𝘁𝗲𝗲𝗿: http://bit.ly/3pDTBKM
𝗝𝗼𝗵𝗻 𝗗𝗲𝗲𝗿𝗲 𝟔𝟖/𝟕𝟎 𝗣𝗿𝗼𝗷𝗲𝗰𝘁: http://bit.ly/3bKGra3
𝐁𝐨𝐛𝐜𝐚𝐭 𝟕𝟓𝟑 𝐏𝐫𝐨𝐣𝐞𝐜𝐭: http://bit.ly/37EDeaD

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Timestamps:
00:00 BMW Airhead Main Bearing Removal
01:52 Main Bearing Retainer Overview
03:29 Bearing Removal/Installation Kit
04:10 Step-by-Step Guide (Theory)
08:09 Main Bearing Installation Process
13:02 Final Words