A
Anonymous
Guest
Had a brainwave that I could temporarily up the HP on the project Kat. I have taken the engine out of another 1100 Kat that I have and installed it into the project bike. I have also fitted a set of 33mm smoothbores that I purchased a few years ago. I have made up a new front drive sprocket using 2 old sprokets that I machined the teeth off and welded to a new 532 x 18 tooth sprocket. (The offset for this bike is 15mm). Once it was welded I machined out the centre of the 18 tooth sprocket so that the mainshaft nut would fit and have plenty of thread to bite on. I used a rear axle nut of a gsxr1100 because it is the same thread and has a flange on one end of it. This flange will help stop the sprocket dancing around on the mainshaft. I have recessed the inside face of the flanged nut to allow for the small amount of spline poking into the inside of the nut. I am running 18 teeth at the front and a 47 tooth on the rear. This gives me a gear ratio of 2.611 which is exactly the same ratio as a standard Kat with 2.8:1 but with the smaller circumferance 180-55 x 17" tyre. The bike certainly has a lot more power and pulled up to 220 okay, but became a bit skittish in the front due to the forks being hard up on the stops under power. I will now concentrate on mounting in a steering damper to stabilise the front end a bit and possibly will need to soften the front springs. It is really surprising how much power this engine is developing compared to what it was doing in the standard Kat frame. I will need to weigh the machine and report back, but I am guessing this project bike is quite a bit lighter with the JMC rear arm, mono shock and the lighter wheels and forks etc.
The front blinkers are temporary, as is the rear exhaust mount on the muffler.
Here is a shot with the (LOAN) 1100 engine in place.
The front blinkers are temporary, as is the rear exhaust mount on the muffler.
Here is a shot with the (LOAN) 1100 engine in place.