KR250A track bike project.

The place to talk about your Tandem!
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Gerrit
Heavy Smoker
Posts: 486
Joined: Fri Jun 26, 2009 12:09 am
Location: Kingdom of the Netherlands

Re: KR250A track bike project.

Post by Gerrit »

After having a second crossbrace welded between the frame tubes, the rear portion was cut off:

Image

I used a piece of 20 x 25 mm rectangular tube which had been cut off the subframe previously and trimmed to size. Waste not, want not. Unfortunately the local welder who was 5 minutes by bicycle away has closed and there isn't any other welding shop nearby so all welding jobs now involve considerable travel- bummer!
Weight of subframe is now 1.5 kg, a saving of 0.8 kg so far.
"Mine is a long and sad tale", said the mouse.
"Indeed it is", said Alice, looking at the mouse's tail.
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maccas
Oil Injector
Posts: 877
Joined: Mon Sep 07, 2009 8:33 pm
Location: east yorkshire

Re: KR250A track bike project.

Post by maccas »

Yes the tandem swingarm is definitely one of the shortest i've seen. Yeah i imagine the trail numbers will be pretty big, but you can correct that by dropping the forks through the yokes to steepen the head angle if required.

Looking good! I wish i could find the time to get started on my project.

Dan
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