Engine Knock. Hi,My bike is a 1979 GS750E.It has done 29,000 miles from new and never been apart.It runs as new.The problem is a knocking coming from the left hand crankcase cover.It ONLY happens when the engine is under load.i.e accelerating.Reving it on the stand the engine makes no abnormal noises. It is not chain,sprockets,rear wheel or cush drive bearings.I have never heard of this problem,have you? The bike is only used on holiday once a year hence the mileage.If it was at home I could pull it apart.If I do this on holiday to find the fault it means leaving the engine open all year.which I would like to avoid if possible. Any clues at all much appreciated.Thanks Colin.

Do you have a blown head gasket and arrived, or somethings cause and the knock take off the head could be the valves go online and ask what would cause a knock in that bike is the only goes 15 miles an hour sounds like you have something blown in your motor start by taking compression test it to compressions bad that something in the cylinders. You might need. It's new rings, but it hasn't knock it could be the valves. When you take the head off, you'll see the carbon buildup can try clean in that off and put it back together. Make sure you use the proper torque don't cut any corners don't tighten it too much. That's why you need to find torque setting seasonal rate bolts, but that engine sound smoked, you may have to get it reboard. If you doing the work yourself

You will likely have to rejet the carburetors due to the more open intake

Hi, it could be a wiring issue. I would check for a broken connection or bare wire shorting to ground. Usually though, when the computer loses the knock sensor signal, it will ****** the timing to a safe range that will not allow the engine to knock. If you tell me which engine you have, I can give you more specific troubleshooting steps, such as the reference voltage for the circuit.

If it knocks at 50 it will knock sitting still if you race it up. Is the oil pressure good? These motors hardly ever have a bearing problem. The only knock problem was the harmonic balacer that comes apart and knocks. The rubber falls apart and it will make a knock sound all the time, more with the ac on. If you have a knock at 50 or highway speed only you may need a outer tie rod end only. Get the front end checked as they will make a knocking sound on the highway. reply

I have a 2006 with a 3.5 (41,000 miles). No oil consumption but had the knock. Started as a slight knock and continued to get louder. My buddy works at the dealer and hooked me up. Chrysler knows about this problem, it's the rocker arm assembly coming apart. They have a new revised part to fix the problem. THEY NEED TO RECAL THIS.

Hello. To answer your question, the answer is no. You cannot disconnect it, bypass it or defeat it. The Knock sensor is critical to preventing detonation (valve 'ping'). Sorry that I do not have abetter answer, but, the Knock is indeed important.

Well i currently ride a new 250 06 crf but the last time i had a knock was on my 2000 cr 250 and that was piston slap cuz the rings where shot..

the floats in the carbs are stuck down...you need to adjust the float levels in the carbs.  You may have adjusted them too high.

Matt, did you enquire on the SV Forum?