Rimar Motors, in the Netherlands, is in the advanced stages of machining and assembling a 600cc 2 stroke, V-twin engine, designed to be installed in a 2004 Aprilia RSV1000R frame. The project has been going on for about a year and they’ve put up detailed photos of the entire process.
The engine uses reed valves and two counter-rotating crankshafts. Cylinders come from a KTM EXC 300, the gearbox is from the RSV1000. The CNC machine work is impressive and they began with CAD drawings and blocks of aluminum. Watching an engine take shape never ceases to amaze me on projects like this and if you appreciate this sort of “design it and do it” attitude, you will be well rewarded by checking out the project.
I was going to try to summarize what’s been going on, but there’s so much detail, it’s better if you just take a look and let them describe it themselves. Very nice work!
Thanks for the tip, Stephen.
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Mike says
Amazing. Such skill.
Jiro Yamamoto says
So, they are using the entire rotating assembly from the EXC 300, crank, rod, piston, bearings etc I assume. Another assumption is that they are building two geared together engines with one custom crankcase instead of joining two cranks, or building a custom crank in a custom crankcase. Their approach is taller, the other approach is wider and joining the cranks is more complicated. Those are my assumptions. Does the EXC300 have direct injection like the ETEC from Bombardier? If not, alas…
Rimar Motors says
Thank you for sharing my little project!!
Best regards,
Richard,