Turning a 250 basket case into a track bike.

[marsheng]

Hi to all and I'm new to Motoscrubs.

I race a Yamaha SR500 in pre 82 at our local club and was very pleased to acquire a 250 MK3 Ducati recently. It is a basket case but all major parts seem to be there. Been sitting in garage for 23 years. It will be turned into a track bike and hopefully fit into the Pre 63 class although the motor was built in 1964.

I've built a few frames so the starting point is to copy the exiting frame with lighter materials. (I also don't want to cut up a perfectly original frame) The existing frame with swing arm and triple clamps weigh in at 20KG, from experience, I should be able to get this around 12-13kg and with mount points for foot pegs and fairings included.

The head is a bit hammered so it needs a bit of weld here and there and new valve seats.

The rest of the motor looks fine.

I' not sure whether to post to a blog site on the rebuild or do a blog here.

Let me know.

http://marshland.co.nz/CB150Frame.html

Cheers Wallace

[Rick]

>I' not sure whether to post to a blog site on the rebuild or do a blog here.

either way, I'd like to see the lightweight frame build
Rick

[marsheng]

OOPs 4 years have flown by !!!!!

I have a deadline of 4 weeks so I have to get it done. All the flat laser cut bits came yesterday and now busy putting them on.

Here are some photos. Guess I should tidy my workshop before taking them.

http://www.marshland.co.nz/ftp/Ducati250/MainTube.JPG
http://www.marshland.co.nz/ftp/Ducati250/MainTube.JPG
http://www.marshland.co.nz/ftp/Ducati250/Right.JPG
http://www.marshland.co.nz/ftp/Ducati250/Left.JPG

I'm adding outriggers to the swing arm and removed all else I don't need from the original frame. Some items are slightly larger so hopefully a lighter and stiffer frame.

All joints are Nickle bronzed. Really the best tube weld method there is. (Tigged just to keep it all together.)

Right back to the workshop.

[Eldert]

looking good Wallace . next is the engine i presume .

Good Luck Eldert

[PhilR]

very nice, wish I was skilled enough to build a frame like this. looking forward to seeing future instalments.