Converting 1980 CR250 engine to a CR420 fire breather!

So, enough of the sidebar. Any progress on the 250 to 420 conversion, or was this thread only about the logistics?
Granted there is a fairly substantial part list in the thread....

The initial post was just to confirm the feasibility of doing this conversion. Now that this has been confirmed, I will begin collecting the few parts I am missing to do it.

But I am pretty busy with some other projects at the moment. I need to finish these up to clear space on the work bench and lift. I'm figuring it will be late fall or winter before I can get stated with this.

So what are these other projects?


1st is this one, its getting there!


Then the 81 430, just put the bottom end back together and into the frame.



Then this needed some updates and carb fixes




And I like to leave a little time to actually ride some of them while the good weather is here :-)

the evo maicos are pretty sweet looking! nice stablemate for the swede!

They all look great. Keep the vintage bikes alive.