Engine has previously had the rotor / flywheel changed as suffered magnets coming detached , has a knock that sounds like the bottom end , maybe big ends , feel the crank end float may not have been set up correctly when new rotor fitted , just wondering if anyone out there has the specs for end float , it feels excessive have not measured it yet, any info would be great , thanks , James.
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Re: engine knocks on idle
I would be checking that the rotor has been torqued up properly too. You can get a manual from here. Is for later model bike, but the essence of these things should be the same. Thanks for using Fixya.Good luck with getting it sorted. A FixYa vote is a great reward for helping you out here. Cheers
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Hi,it sounds from what you are saying that you have got a inturnal falt with the gearbox,im affried the only way to make a propper diagnoses is to take it apart and look at the gear sincros there has to be worn bearings,or teeth on the gears,or the sellector,or something has just manidged to come loose.
I wish you all thhe best.
It could be that your primary chain tension needs adjusting or you could have a magnet in the rotor that has come loose and is rubbing the stator. Since you're hearing a noise, I'd disconnect the battery, drain the primary case, and take the outer primary cover off. Check the tension on the primary chain. It should have between 7/8 and 3/4 inch up and down play in the middle of the top run. If it's ok, look for any indications of metal fragments near the compensator sprocket and the rotor. This may be difficult to see as the magnets catch most of the metal fragments and they aren't readily visible. If you have the tools, I'd pull the engine sprocket, chain, and clutch assembly. This will allow you to get the rotor off to inspect it.
Hello mary...you could have a detonation knock or "spark knock" due to bad gas. Have you had your valve lash checked and adjusted @ recommended intervals? Could also be a timing chain noise...If you can determine what area of the engine the sound is coming from would help...To help pinpoint you can take a short piece of hose, like a heater hose or even garden hose, hold it to your ear and move it around on the engine. The knock or rattle will intensify as you get closer to it....Good luck, i hope this helps.
it needs to be replaced you cannot fix that.. you may even be able to find a used one at a local junk yard seeing how they may be a little expensive.. let me know how you make out.. and also make sure you clean it well
No it will not if you have a bad clutch it would cuase hard shifting and possible engine kill. if your transmission is skipping 2nd gear you are looking at a bent shift fork in the transmision, I have come across this before and it is not fun to get to, to replace. the engine knock on the other hand can you tell where its coming from... top front of engine, lower front, rear. does the knock sound like a thud, tap, chain rattle. fast/slow at idle? I would need clarification on the knock
hi,most bigbore v-twins have a knocking sound coming from the bottom end,it is usually caused by the tolerance in the big end bearings and normal wear and tear,however in saying that,if the noise is a very metallic type knock,get it checked out straight away,it is quite difficult to diagnose a knock without seeing or hearing the bike running,but if in doubt,get it checked over by a reputable motorcycle mechanic,it will be inexpensive to get it checked over and find nothing wrong,but could be very expensive if their is something wrong..cheers