The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: dfang on May 14, 2023, 07:17:52 PM

Title: Rebuilding r65
Post by: dfang on May 14, 2023, 07:17:52 PM

Received a bike in pieces,how do you find tdc if it wasn’t set when dismantling

Title: Re: Rebuilding r65
Post by: georgesgiralt on May 15, 2023, 01:18:20 AM

Hello !
Is the engine assembled ? Is it in pieces with the flywheel removed ?
Answer depend on the state of completeness of the engine.
Could you post a couple pictures, please ? One of the front,one of the rear.
Have a nice day !

Title: Re: Rebuilding r65
Post by: dfang on May 15, 2023, 03:51:10 AM

Engine is assembled,up to pistons on con rods, fly wheel is off.

Title: Re: Rebuilding r65
Post by: georgesgiralt on May 16, 2023, 02:13:52 AM

That's easy. Move the pistons out as much as they will go. This will make TDC. Then, put the flywheel on the crank with the OT mark in the window. As the crank and flywheel have 5 screws, they are 52° apart so you can't go wrong "one screw hole"...
As both cylinders are out at the same time, it is irrelevant which one you choose to be at ignition point when you set the valves and ignition. Of course, once you have chosen one side, make a one turn of the crank to set the other side at ignition point...
Hope this helps.

Title: Re: Rebuilding r65
Post by: dfang on May 21, 2023, 08:27:55 PM

I will try that,thank you very much.

Title: Re: Rebuilding r65
Post by: Tony Smith on January 27, 2024, 06:22:14 PM

I feel for you. I have finished assembly of a bike that came as a frame and six boxes.

Worse, it is a Frankenbike incorporating components from /6, /7 and monolever machines.