Patrick's GSX-R7/11F Project

The engine

I bought the engine a year before the chassis. Because I got enthusiastic by the PB article about Bradley O' Conner's 7/11 I knew I had to have a GSX1100F engine with lots of reliable low down grunt.

I fitted the engine into the frame by laying it on it's side (luckily Ludo's garage has a carpet on the floor) and lowering the frame over it. This was very exciting as I didn't know beforehand if it would fit inside the '86 GSX-R750 frame. I was very delighted it did, but I had to remove the breather cover on top of the valve cover first. All of the engine's mounting points lined up perfectly with the frame and I felt on top of the world to see the beautiful engine resting inside the frame :-)

Because the standard oil lines of the 750 connect to the bottom of the sump, but the 1100F has the connections at the front of the engine I swapped them and had to bend them a little to make them fit. They now run a bit awkward in front of the cooler, but they will have to do until I've saved up enough money to buy flexible stainless lines (but they are INCREDIBLY EXPENSIVE!).

The K&N air filters had enough space around them, which is mostly a big problem with big engines in small frames. I had tried if the GSX1100F air box would fit between the beams of the frame, but it needed too much modification to make it fit.

I have also tried to fit 38mm slingshot carbs, but that resulted in three major problems...
First, the intake channels inside the F's head are 2mm smaller than the inlet rubbers from the 38's resulting in a 1mm ridge which is bad for gas flow.
Second, the 38's rubbers made the carbs stand at a steeper angle, making it impossible to fit air filters between the carbs and the frame beams.
Third, I discovered that my brand new K&N's wouldn't fit the bigger 38's.
So I decided to stick with the 34mm's which are very good for low end power but restrict the engine at high revs and keep the 38's for maybe some future project if I ever come across a bargain GSX1100EFE engine.

I'm using a rubber hose as an engine breather which runs towards the rearlight into a PiperCross filter. I want to connect a breather to the oil filler cap, but I haven't quite figured out how I will do that.

Enough space for the air filters