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Discussion Starter · #1 ·
[media]http://s433.photobucket.com/albums/qq60/theCrusher1234/?action=view&current=funnynoise.mp4[/media]



whats this sound like to you?
 

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does it do it every time or what? does it do it if you were going to start the bike instead of having the kill switch turned off?? but i dont think its your starter clutch but maybe some thing worked loose like on ricks bike with that screw kinda sounds the same to me
 

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Discussion Starter · #3 ·
yeah it makes that sound almost every single time. its always made that sound but intermitantly there is a loud clank. i wanted to pull the spark plugs to see if they are fouled and maybe to a compression test but i can't get either of them out. what size is the plug? i have all the standard sizes but none of them fit down the tube to actually seat on the plug
 

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its a 18mm spark plug but if you can find the holy grail of sockets (18 mm) then it will work i use what ever is the closet fit and that works for me
 

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Discussion Starter · #5 ·
all my spark plug sockets are SAE. i didn't think they would work, all my metric sockets are either under 14mm or short. looks like i'm goin to harbor freight tomorrow after all
 

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lowlife,yes you need a spark plug spanner.but,youl need your socket set first,the engine needs to come out.i would not carry on using the bike until iv sourced that noise
 

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I can't judge audio recordings... but that does sound like something out of whack. Did you do anything to the valve train recently? Cam Chain ? My Bike makes that loud clack sound in the xmission upon shifting occasionally.





I learned through this forum
to spray some shpritz into those weep/drain holes on the sides of the cylinders... and blow them clean with air before loosening plugs.



All kinds of crap will fall into the c'bustion chamber if it's not cleaned out on top first...




ThX Forum!
 

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Discussion Starter · #9 ·
I haven't made any valve train changes. i have pulled the valve covers to clean and paint them but they went right back on with no issues. the plugs look almost rusted in place. the heads are greenish. i'm going to go to harbor freight at lunch and get the right size tool to pull them off. cross my fingers that i have compression etc. i wasnt planning on rebuilding the motor too.
 

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Discussion Starter · #10 ·
plugs were completely oil soaked. they also looked like the wrong brand from what i read on the plug. replaced them and poured some more gas in the tank. two cranks fired right up. idle is back to wicked high again cause i was dicking with the idle screw. i'll set that back and try again.
 

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is the noise still there after you changed plugs?
 

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is the noise still there after you changed plugs?
on starting,there is a definite ...clack,, in that recording.it is not a normal cranking noise
 

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Sounds a bit like detonation. Piston squashing the fuel, no spark, and exploding under compression.



If its gone away with new plugs, give it a burn up the road, if noise is still there, DON'T !!



Check to oil filter for metal particles, a spun big end bearing is a common issue with CX's. You'll see copper and metal flakes in the oil.



Have you cleaned the carbs? Changed your fuel?
 

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Discussion Starter · #14 ·
the noise is gone. it starts on the first crank with fresh fuel and new plugs. i only let it run for about a minute to make sure there was no rotating assembly noise. i plan on changing the oil in a few weeks. i already changed it in the beginning of the build and i havent driven it but after running it idle in so many different air/fuel combinations i think i should change it and check it for metal flakes. i'll pour it thru a cheesecloth or something to check for impurities.
 

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the noise is gone. it starts on the first crank with fresh fuel and new plugs. i only let it run for about a minute to make sure there was no rotating assembly noise. i plan on changing the oil in a few weeks. i already changed it in the beginning of the build and i havent driven it but after running it idle in so many different air/fuel combinations i think i should change it and check it for metal flakes. i'll pour it thru a cheesecloth or something to check for impurities.


When the oil is draining let it run through your fingers as this will show by feel as well any gritiness in the oil.
 

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Discussion Starter · #16 ·
good call. i want to burn it down the road but there is no front brake on it currently. still have to rebuild that before i feel comfortable driving it.
 

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well i am glad the noise is gone and now your a little closer to getting that on the road i know you have been wanting to for awhile now so just take a spin down the road you dont need a front brake (i ran a year with out one) just use your rear and slow sooner
 

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Discussion Starter · #18 ·
i have pretty shitty coordination i'll give it a try but it will probably be sunday. i got a list of honey do's at home and sunday is my day to work on the bike. i didn't even really want to still use my front brake. i wish i could move it to the foot peg and do like a dual pedal for the rear as well. that might be a little tricky. i also may want to switch over to a jockey shift. i really want my bars to be as bare as possible for the looks.
 

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man i just want to go for a ride some time soon and i am sure you will learn how to use your back brake only...
 

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Call Russell Mitchell at Exile Cycles. He invented a hidden clutch lever, that turns like a throttle tube, but on the left. No front brake lever. No levers at all.



 
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