| Modified Subframe |
| At
first I tried to raise the rear-end by fitting a longer shock, but
that messed-up the geometry big-time so there's nothing to be gained
from that. Besides, when you lower the rear wheel the clearance between the chain and the swingarm decreases too which makes the chain run onto the swingarm at all times which is very inefficient at least. |
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| So
instead of lowering the rear wheel and messing up the frame geometry
I had to raise the seat unit. The standard subframe gives you very little to play with because if you raise the seat unit it immediately shows it's ugly head. In my first design I wanted to remove the old subframe and replace it with a midld steel tube item, but the construction of the joints to the frame would be troublesome. The plan of building a new subframe from aluminum was turned down also because we'd have to build a jig to keep it straight during welding. |
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Robby's brother came up with the all new plan of cutting the existing subframe so nothing would protrude from under the repositioned seat unit and using strips to accomplish the required difference in height (approx. 120mm). I then bought some u-profile to make the support for the seat unit. The seat unit will be self-supporting now as it's thick enough to keep it from wobbeling. |
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