[bendingspoon]

Ok i have an ex500 and i have a weird noise coming from the engine. it sound slike a slapping type noise above the gear shifter in the motor. it inst there when i am out of gear and the bike is idling. when i put the bike in gear and start to move it starts, and when you accelerate there is a noticeable jerky feel until about 7000 rmp then the bike takes off and you dont feel it anymore. it is mainly there when you are just cruising and there is kind of a clank noise from the motor when you are letting the bike slow down in the gears with no break. the sound to the best of my ability sounds a bit like this, ta tap ta tap ta tap, sounds almost like a chain in the motor is slapping or something, the bike has no power loss at all, runs fine when your not in gear but just does all this when you are in gear and moving. any ideas?

 

[jlmay]

chain

 

[bendingspoon]

which chain? and how do i fix it?

 

[Frog]

Probably referring to the chain that's driving the cams.

Which year is the bike ?

 

[a.lee.hagen]

Maybe your chain is hitting your swingarm...

 

[jlmay]

if it sounds like a sewing machine then it's a common thing.

 

[bendingspoon]

it is a 2001 ex 500. ok i will try clarify where it is coming from. it is not the drive chain. the slapping sound is comming from inside the left side of the bike inside behind where the kawasaki word is on the thing that looks like a big flathead screw.

 

[jlmay]

inside the left side of the bike inside behind

lol wut?

 

[bendingspoon]

ok you know where the front sprocket is? the part of the motor just in front of that is where the noise is coming from

 

[jlmay]

you sure you arent just hearing the drive chain?

 

[bendingspoon]

yes i am sure it isn't that. this is coming from inside the motor

 

[Frog]

Is shifting smooth ?

How about clutching ?

 

[bendingspoon]

shifting and clutching seems to be ok, is sounds like something is loose inside the motor, a chain or something, it runs kinda of jerky if you know what i mean. like when you give it gas it jerks back, when you let go of throttle it jerks forward but when you are at a steady speed it feels like something is catching and slipping, but the sound is not on the clutch side

 

[Frog]

open it up and take a look

 

[a.lee.hagen]

Is that where the stator is located?

 

[Jsvob03]

when i got my bike, the chain was very loose (around 2.5" of play, just nuts!) if i tried to ease on the throttle, it would jerk real hard, much the same when i let off the throttle. I got the chain to around 1" deflection, and the problem is gone..then noise...IDK. good luck.

 

[dad]

It won't cost anything to pull the front sprocket guard and inspect there. It still sounds much like a drive chain issue... the best you can tell on the net. Good luck.

 

[fog]

Your probably hearing the primary drive chain slap. These have no adjustment and when stretched will make a slapping noise when the hit the rubber rub strip placed for that purpose.

FOG

 

[bendingspoon]

so if it is the primary drive chain that is slapping which is what i originally thought it was, then there is no way to make it stop the slapping noise unless i replace it correct? is it ok for it to be loose or do i need to get it replaced asap?

 

[bendingspoon]

sounds like it is coming from this area in the red circle in the pic

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