you probably have too little oil in the motor. the sound is caused by the lack of oiling to the valves. check your oil level and make sure your valves are in working condition (no burns or shaving of the metal) and you should be fine. if the sound continues, then go to an authorized service shop. i do not recommend attempting to ride the bike unless absolutly nessesary. good luck though.
on the lower part of the engine near the cats
Under hood, passenger side, lower engine area, front of starter, mounted in engine block.
Under the upper and lower intake manifolds at the back of the engine block.
The Miller Cycle engine has a very flat torque curve, with maximum torque achieved at 3500 rpm, as compared to Otto Cycle (standard 4-stroke) engines which generally require 4500 rpm or higher. Due to this lower-end torque ability, the Miller Cycle engine is capable of moving much heavier loads at a much lower fuel economy.
there may be two knock sensors on that 4.3L engine. One would be on the back of the passenger side cylinder head and the other would be on the drivers side, lower engine block area.
It is between the heads, under the lower intake manifold.
The knock sensor is located - are you ready for this? - in the valley of the engine under the intake manifolds. Both upper and lower manifolds must be removed to gain access.
The engine is overloaded in case it of generator set or any other load and in case of a car the vehicle is not engage in lower gear as per load and engine rpm.
The knock sensor on Nissan 300ZX non-turbo from 1990 thru 1996 is located below the lower intake manifold on the rear of the engine block. To replace the knock sensor the upper and lower intake manifolds need to be removed. It is always best to replace the knock sensor with a new one considering its major dissasembly.
The knock sensor on the 1996 GMC Jimmy 4-wheel drive, 4.3 liter 6-cylinder is mounted in the engine block. Under the hood, look in the lower engine area on the passenger side, beneath the cylinder head.
yes absolutely, just happend to me on a rebuilt engine, with less than 2hrs runnjing time.
If it's the same as an '89 RS it's Under hood, passenger side, lower engine area, front of starter, mounted in engine block