Undertray

So by using a cbr600rr rear subframe, a new undertray is needed. A new undertray would be a big benefit in terms of weight saving anyway as the oem vfr800fi undertray is a beast, it does its job well, but there is a whole lot of plastic there, which is no longer needed. Also on my vfr I was lugging around a scottoiler which weighs atleast 1kg wet, which i can now get rid of.

stock undertray removed along with scottoiler

Instead of buying a stock cbr600rr undertray, making my own will mean a better fit for this custom job and the potential to make a lighter component.

A rough template is made from cardboard, giving the basic dimensions of what the undertray needs to be. This was then put in place under the rear subframe and adjustments made where necessary.

The template was then transferred to fiberglass sheets and cut as needed. The first layer was one whole piece of fiberglass then layers of strips were added till the desire strength was attained.

Once the fiberglass had cured, it was painted in a sealant black paint, then attached to the subframe. A slot for the battery was cut out, and then a battery holder was constructed.

Battery container made and attached to the undertray. silicon sealant was added to the edges of the undertray just to give a better barrier from the electrics inside against the elements.

Job done, and the undertray is much lighter than the old one (well only about 2kg saved with getting rid of the scott oiler aswell, but every little helps). Next attachments need to be added like the reg plate and rear light, which will be done later.