87 KDX200 Noise at idle???

F

FULL-THROTTLE

Member

Oct 31, 2004

5

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• Oct 31, 2004

• #1

Hello,

I am looking for some advise/help, I have a 1987 KDX200 (the last of the air cooled), completely stock except a FMF Fatty pipe and an answer tip, at idle thru 2000 rpm's I can hear a ticking sound, (it sounds exactly like a lifter that needs to be adjusted on a four stroke,) after 2000rpms it goes away???????????.
The bike has great compression and runs 100% with a ton of power. It does have what appears to be an exhaust limiting valve assembly on the right side of the engine and this does actuate correctly.
I have ridden the bike this way for over a year but the sound has me baffled.any ideas or theorys would be appreciated

Fran

 

R

rethnal

~SPONSOR~

Jul 14, 2002

659

0

• Oct 31, 2004

• #2

Clutch noise?

 

J

JasonWho

Member

Apr 10, 2002

2,109

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• Oct 31, 2004

• #3

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Last edited: Feb 13, 2005

F

FULL-THROTTLE

Member

Oct 31, 2004

5

0

• Oct 31, 2004

• Thread starter
• #4

I have been thru every nut and bolt on the bike and nothing is loose, I also pulled in the clutch while it was running and no change to the noise??? The sound is a very mild metal tapping noise

Thanks again for any input

 

J

JasonWho

Member

Apr 10, 2002

2,109

0

• Oct 31, 2004

• #5

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Last edited: Feb 13, 2005

F

FULL-THROTTLE

Member

Oct 31, 2004

5

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• Oct 31, 2004

• Thread starter
• #6

I have not pulled the clutch cover but the mechanism is working correctly, when I give it a good amount of throtttle the rod from the gearbox turns and the arm going into the head (and I assume exhaust) actuates. I assume this is a low rpm exhaust limiting mechanism??

 

R

rethnal

~SPONSOR~

Jul 14, 2002

659

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• Oct 31, 2004

• #7

My clutch makes noise if it is in or out.... tone changes a little, but not much. How long has it been making this noise? One thing you can do is get a mechanics stethoscope and pinpoint the source of the noise. These are cheap... $5 or so....

 

K

KDXKen

Member

Dec 14, 2002

49

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• Nov 1, 2004

• #8

Ive got the same problem with my 88 took it to a shop and they couldnt even find it so i guess im gonna ride it till it breaks then im gonna say "damn so thats what that tappin was"

 

F

FULL-THROTTLE

Member

Oct 31, 2004

5

0

• Nov 2, 2004

• Thread starter
• #9

The local shop said it was piston slap, I pulled the head and jug and the piston was getting a little loose, so I'm going to put in a fresh set of piston and rings. I got lucky by checking it early the cylinder walls were fine and i'm still on the original/ standard size piston.

 

J

JasonWho

Member

Apr 10, 2002

2,109

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• Nov 2, 2004

• #10

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Last edited: Feb 13, 2005