Much against the criticisms of family and relatives, I bought a fury back in 1988 (since sold it 1992 due to a trip to U.S.).
I write this review as a former owner and want to share the joys and frustrations I had with the bike since I purchased it.
If any of you have the Bike, don't trust the stock parts as they are notoriously unreliable and Enfield support both mechanics and parts are very poor at supporting this bike.
The bike I bought was second hand with all the original parts from enfield and was plagued with problems right from the start.
The Front suspension was leaking. The Disc brakes were leaking. The bike rattled. The engine mounting was bad and the Gearbox was shot. It also had the sudden acceleration problem where the bike would wheely while changing from 2nd to 3rd gear. It had a sticky float. The Oil seals and gasket were shot. The electrical system was shot and the chassis had few cracks near the tail lamp.
I was fortunate to have a relative of mine who owned a work shop and together with a work shop manual we lathed a few parts and borrowed others from Rajdoot and other bike spares.
A few points to note for propective Fury owners is that the mounting from the carburattor to the Engine Intake with the Cavity resonator in the middle is made up of rubber and prone to cracks and leaks have it customized to either aluminium or other metals By lathe. The same goes for the engine and fuel tank mounting. The gear box from the GP version is more relaible (less prone to breakage) than the original the cons is that 4th and 5th gear power is lacking so you trade reliability with power (The gear box is Expensive).
The mileage should be around 35 kms/litre (I got 40+ with proper tuning) The problem lies within the float chamber and the cavity resonator and with proper tuning and care it can be resolved