It depends on what you call fits... You can fit one but you generally have to grind down a bit of your frame and unless you have a nice new shock it could hit the fuel tap when going over bumps or anything else that compresses the rear shock a lot. You also have to drop one side of the engine out when you want to fit and remove it. There's also quite a lot of technique involved in getting the stub in the right place so it slots in.
Its got pm 55 crank , 172 bore , 25 m delorto carb , pm variator , cases been flowed and few other bits , the bike runs good buh wonder if the 59 would make it any better , thanks for your help mate
I cut my 59 to fit the typhoon, i cut the rear cone/silencer off and rotated it inwards so it cleared the petrol tap. Also the 59 gave a flat power curve compaired to the 55.