I luv this kind of stuff
How will you decide where u want the swingarm pivot??
I'm in the process of determining ground clearance as well as final rake angle. Once I have those, I'll lower the pivot to give me as close to a straight line between the rear axle and countershaft as possible at full sag/ride height.
Right now, that's a stock CR250 front end but I have plenty of work to do there as well. With this much bike, I'll need better braking than one small rotor can provide! I'm going to build a dual brake setup using the stock 919 calipers.
is the head tube strong enough for real punishment?
The stock head tube is plenty strong but the frame is in no way strong enough. I'm going to build a lower frame/cradle/bash bar that will support the frame and head tube. I'll also brace the rear end to support panniers of some sort.
Very impressive and ambitious project!! It's already been addressed but I was wondering about a downtube/skidplate and better brakes when I saw the first photo as well. The KTM 990 Adventure uses a dual disc setup on an off-road wheel.
Keep us posted on your progress!!
Great and as has been said, ambitious use for a wrecked 919. It seems like a real heavy handful to ride on the dirt though, especially with a bash plate/frame cradle setup. Look forward to seeing how this goes, though!
Are you intending the result to be street legal, or offroad only?
Many, many changes have popped up since I last updated this thread.
A new baby boy arrived, a new 919 donor bike showed up, new KTM 990 supermoto forks made their way on, and new KTM 950 Adventure wheels are on the way!
Here's where I am today.
The next step is to start chopping my spare 919 frame apart. I'm going to "move" the stock swingarm pivot down about 1" and back about 4". That will align the swingarm and chain angles. I'm also going to push the stock 919 tailsection straight back about 5" to make room for my new panniers. Then after I've really ###ked up a good 919, I'm going to build a lower engine cradle and a custom exhaust. Fun stuff........
We're not in Kansas anynmore Toto. I could not bring myself to saw em'
Looks cool though & well thought out.
Why two frames? You making 2?
Thanks. To maintain strength, I had to chop a bunch of steel out and re-weld it.
I ended up buying two wrecked 919's so I already had two good frames. I'm chopping up one of them to add material to the good one. It saves a lot of welding and fabrication and metric sized steel is really exensive here.
You sir have some enormous cajones!! I love the ingenuity of this project, but the thought of cutting apart a couple frames would have me sweating bullets!
What kind of off-roading do you plan to do? Once past the fire roads this beast could be quite a handful!!
Keep the photos coming!!!!!!!