Franzis 1/2 scale BMW R90S engine
A fairly simple kit, the kind an adult would build with a child as an educational device. I took it a few steps further. I painted almost everything even though most would be seen through the clear parts. I put light oil on all the moving parts.
I cut the motor and spark plug wire plugs off and ran the wiring inside instead of outside. The video is made of static photos of the progress with videos of it running at the end.
I have a Tamiya 1/6th bike of the R90S, thats next in line to build.
Photo also included is a “Lazy Susan” i found while cleaning the garage…I painted it black so I could “spin” the molde and photograph it. I was going to motorize it but that seemed like to much work so I used push pins and a string :). It worked well even if it was a bit jerky for the videos
Here is a YouTube video I made of the build, enjoy and feel free to to leave a comment 
Great build and presentation!
@gwskat thank you Gary, it was a good diversion
Love it, Cricket!
Congratulations!
@fiveten Thank you Spiros, it was a fun build especially with all the extra stuff I did
This is a great build, Cricket @bikequeen
Also the video is fantastic, it nicely shows how the gears are being selected.
@johnb Thank you John, it was a calm in the storm for me
You’ve made a great model out of this “toy”, Cricket.
@chinesegeorge Thanks George, yeah I had to “improve” it ; )
This came out great, Cricket (@bikequeen). Well done.
@gblair Thanks George
I've seen several visible engines but never a motorcycle engine. Very interesting article and well done model engine.
@robgenev665 Thank you Robert, was an interesting build
I love it Cricket. A unique kit, and a great build!
@pb_legend Thank you Andrew, it was fun
Awesome!
The local BMW dealer in KC has a R90S for sale, very cool bike.
@eydugstr Thank you Doug, I got a 1/6th scale bike sitting waiting for me
1 attached image. Click to enlarge.
That is so cool, Cricket @bikequeen!
I loved that video; super cool stuff and great work all around! 
@garybrantley Hey Gary, thank you so much! I appreciate your comment : )