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post #1 of 15 (permalink) Old 04-26-2019, 03:17 PM Thread Starter
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Hello,

Today I went for a little ride and noticed a rattle that sounds like it is coming from around the exhaust to steering shaft. I think it is the exhaust but just want to make sure it’s nothing major. I’ve done some research and people are also saying that it could be the cam chain. It is probably also worth mentioning that it only rattles when I’m Reving it up/accelerating. (1986 Honda trx350 btw)

Any ideas?
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post #2 of 15 (permalink) Old 04-26-2019, 03:23 PM
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does your model have the decompression lever on the top right side of rocker box ?, if so , is it loose ?. not many cam chains on that model rattle, but !!..it very well could be a worn cam chain !!. being an '86 ?, its prob never been changed !..lol.

'89 trx350D foreman 4x4...'85 vf700c magna, '03 trx450fm foreman 4x4 , 2015 Yamaha waverunner fx cruiser ho, '08 vt750c2 shadow spirit
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post #3 of 15 (permalink) Old 04-26-2019, 04:25 PM Thread Starter
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does your model have the decompression lever on the top right side of rocker box ?, if so , is it loose ?. not many cam chains on that model rattle, but !!..it very well could be a worn cam chain !!. being an '86 ?, its prob never been changed !..lol.
Does a decompression lever have a spring around it and a wire going to it? Because is so it does. The more I listen to it the more I think the sound is coming from outside the motor but that’s just me.
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post #4 of 15 (permalink) Old 04-26-2019, 04:32 PM Thread Starter
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does your model have the decompression lever on the top right side of rocker box ?, if so , is it loose ?. not many cam chains on that model rattle, but !!..it very well could be a worn cam chain !!. being an '86 ?, its prob never been changed !..lol.
I just started it and warmed it up for a bit and the sound stopped once it was warmed up... but I also noticed a shaking noise when reving down after it was warmed up...

Now I’m really confused?
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post #5 of 15 (permalink) Old 04-26-2019, 05:09 PM
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does your model have the decompression lever on the top right side of rocker box ?, if so , is it loose ?. not many cam chains on that model rattle, but !!..it very well could be a worn cam chain !!. being an '86 ?, its prob never been changed !..lol.
I just started it and warmed it up for a bit and the sound stopped once it was warmed up... but I also noticed a shaking noise when reving down after it was warmed up...

Now Iím really confused?
noise stopped once warmed up ?, this tells me the valves need attention. shaking noise ?, like a whirling ..then clunk ?, this is the clutch one-way centrifugal clutch bearing.

'89 trx350D foreman 4x4...'85 vf700c magna, '03 trx450fm foreman 4x4 , 2015 Yamaha waverunner fx cruiser ho, '08 vt750c2 shadow spirit
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post #6 of 15 (permalink) Old 04-26-2019, 05:31 PM Thread Starter
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does your model have the decompression lever on the top right side of rocker box ?, if so , is it loose ?. not many cam chains on that model rattle, but !!..it very well could be a worn cam chain !!. being an '86 ?, its prob never been changed !..lol.
I just started it and warmed it up for a bit and the sound stopped once it was warmed up... but I also noticed a shaking noise when reving down after it was warmed up...

Now I’m really confused?
noise stopped once warmed up ?, this tells me the valves need attention. shaking noise ?, like a whirling ..then clunk ?, this is the clutch one-way centrifugal clutch bearing.
I just replaced the one way starter clutch/one way bearing if that is what you’re referring too, used a oem one too. I remember hearing a whirling sound but not a clunk.
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post #7 of 15 (permalink) Old 04-26-2019, 05:43 PM
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I just started it and warmed it up for a bit and the sound stopped once it was warmed up... but I also noticed a shaking noise when reving down after it was warmed up...

Now Iím really confused?
noise stopped once warmed up ?, this tells me the valves need attention. shaking noise ?, like a whirling ..then clunk ?, this is the clutch one-way centrifugal clutch bearing.
I just replaced the one way starter clutch/one way bearing if that is what youíre referring too, used a oem one too. I remember hearing a whirling sound but not a clunk.
starter clutch and centrifugal one-way bearing is TWO different bearings and two different sides...lol. starter clutch is on left side, centrifugal clutch one-way bearing is on right side.

'89 trx350D foreman 4x4...'85 vf700c magna, '03 trx450fm foreman 4x4 , 2015 Yamaha waverunner fx cruiser ho, '08 vt750c2 shadow spirit
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post #8 of 15 (permalink) Old 04-26-2019, 06:04 PM
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Originally Posted by 86Hondatrx350 View Post
Hello,

Today I went for a little ride and noticed a rattle that sounds like it is coming from around the exhaust to steering shaft. I think it is the exhaust but just want to make sure itís nothing major. Iíve done some research and people are also saying that it could be the cam chain. It is probably also worth mentioning that it only rattles when Iím Reving it up/accelerating. (1986 Honda trx350 btw)

Any ideas?

Check the exhaust protector and drive shaft coveróif the bolts are missing they will rattle.
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post #9 of 15 (permalink) Old 04-26-2019, 06:12 PM Thread Starter
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Originally Posted by 86Hondatrx350 View Post

I just started it and warmed it up for a bit and the sound stopped once it was warmed up... but I also noticed a shaking noise when reving down after it was warmed up...

Now I’m really confused?
noise stopped once warmed up ?, this tells me the valves need attention. shaking noise ?, like a whirling ..then clunk ?, this is the clutch one-way centrifugal clutch bearing.
I just replaced the one way starter clutch/one way bearing if that is what you’re referring too, used a oem one too. I remember hearing a whirling sound but not a clunk.
starter clutch and centrifugal one-way bearing is TWO different bearings and two different sides...lol. starter clutch is on left side, centrifugal clutch one-way bearing is on right side.
Quote:
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Quote:
Originally Posted by 86Hondatrx350 View Post
Hello,

Today I went for a little ride and noticed a rattle that sounds like it is coming from around the exhaust to steering shaft. I think it is the exhaust but just want to make sure it’s nothing major. I’ve done some research and people are also saying that it could be the cam chain. It is probably also worth mentioning that it only rattles when I’m Reving it up/accelerating. (1986 Honda trx350 btw)

Any ideas?

Check the exhaust protector and drive shaft cover—if the bolts are missing they will rattle.
Noticed it only rattles at a certain rpm, about 1/4 throttle if that gives you an idea
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post #10 of 15 (permalink) Old 04-26-2019, 06:18 PM Thread Starter
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Originally Posted by 86Hondatrx350 View Post
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Originally Posted by shadetree View Post
Quote:
Originally Posted by 86Hondatrx350 View Post

I just started it and warmed it up for a bit and the sound stopped once it was warmed up... but I also noticed a shaking noise when reving down after it was warmed up...

Now I’m really confused?
noise stopped once warmed up ?, this tells me the valves need attention. shaking noise ?, like a whirling ..then clunk ?, this is the clutch one-way centrifugal clutch bearing.
I just replaced the one way starter clutch/one way bearing if that is what you’re referring too, used a oem one too. I remember hearing a whirling sound but not a clunk.
starter clutch and centrifugal one-way bearing is TWO different bearings and two different sides...lol. starter clutch is on left side, centrifugal clutch one-way bearing is on right side.
Quote:
Originally Posted by Goober View Post
Quote:
Originally Posted by 86Hondatrx350 View Post
Hello,

Today I went for a little ride and noticed a rattle that sounds like it is coming from around the exhaust to steering shaft. I think it is the exhaust but just want to make sure it’s nothing major. I’ve done some research and people are also saying that it could be the cam chain. It is probably also worth mentioning that it only rattles when I’m Reving it up/accelerating. (1986 Honda trx350 btw)

Any ideas?

Check the exhaust protector and drive shaft cover—if the bolts are missing they will rattle.
Sorry for wasting everyone’s time... it was in fact the exhaust protector, the bolt wasn’t loose but it was rattling so I put my hand on it and stopped. Still don’t know why I could hear a whirling and shaking noise from the top end though...

Thanks for the help
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Last edited by 86Hondatrx350; 04-26-2019 at 06:21 PM.
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