model 50cc engine

This is my version of a 50cc 3d printed engine , and i mean everything although for rigidity i can recommend using these parts non printed(you can find them for cheap on aliexpress) 

6203 bearing and 6000 bearing

2x 20mm m4 screw

4x 25mm m4 screw (file below)

You will also need some extra parts such as :

1.75 mm filament (to lock parts in place)

Glue (to lock filament in grooves)

2x  6mm x 8 mm compression spring (for valves)

Assembly is divided into 3 parts :

The cylinder assembly .

The "Culasse" sry only know french term :(.

And finally the "carter".

So first to assemble the main cylinder :

Clamp the 6000 bearing in between the two connecting rod parts as shown ->
then screw in your two 20mm m4 screws until tight.

Then to attach piston :

1. position piston as shown

   

1. Then insert piston pin through both as shown ->

   

2. clip in the pinlock as shown , repeat on opposite side

   

Next we assemble the crankshaft:

1. Assemble your crankshaft pins together through the 6000 bearing as such and glue them together and to the bearing as shown.

   

2. insert the crankshaft parts onto the pin as shown and glue them into place

   

3. insert the large cam gear onto the camshaft part with the square ending as shown .

   

4. insert this whole assembly into the piston bore as shown 

   

Thats the first part done now onto the "culasse"

1. first insert the two valves into place as shown 

   

2. lock in the valves by attaching them as shwon and inserting filament through hole and gluing it in place as shown

   

3. next insert the two camstop into the "culasse" as shown .

   

4. then insert the small cam  onto the latter as shown

   

5. finally attach the two small cam gears onto their ends as shown

   

So now to assemble the two first assemblies 

1. screw the 25 mm M4 screws into the 4 presented holes into the piston bore , make sure that the small cam gears will be in same direction as large cam gear

   

   

2. next to time them together add the band between small cam gear and large as shown, repeat on other gear.

   

Now for last part

1. the enclosure simply clamp them into eachother as shown and glue them together at seams .

   

And voila your model engine is complete 

I AM NOT RESPONSIVLE IF YOU HURT YOURSELF TRYING TO USE IT AS A REAL ENGINE PLEASE DO NUT USE FLAMMABLE OR EXPLOSIVE CONTENTS INSIDE THIS IS A MODEL ,