Bad rattling

I have a terrible metallic rattle coming from my engine / tranny. I've pulled the jug and the pistion and rod seem to be fine. The rattle isn't 100% constant but is there most of the time. The bike only has about 700 miles on it and the noise is getting worse. I'm afraid it's gonna reach the end of the warranty and explode.

What really worries me is that I'm gonna be zippin down a hill at about 44 mph and the damn thing's gonna lock up; thus sending me on a long date with some asphalt.

Does anyone know of any parts in the casing that may be causing such a noise? I've checked the oil and it's clean as new...no filings or chunks. There seems to be no real diffy with rpm changes, expect that the rattle also speeds up and turns to a little bit of whine. Blast it all, I would get a female bike...just kidding.

Any help at all would be appreciated,

Lane

Re: Bad rattling

Are you sure it isn't just a loose body part or something like that... that is vibrating like mad?

Something rubbing on something?

(look for wear marks)

You might have to do some disassembly to find it.

By the way... Always describe the make, model, and year.

Re: Bad rattling

Chris Robertson /

Hi Lane:

I had a problem similar to what you describe just a week ago. While I was cleaning the exhaust on my Peugeot 103, I noticed that one of the pipes inside was cracked. I left the broken part out when I reassembled everything and the rattling went away.

Might be worth taking a look.

Chris.

Re: Bad rattling

Ron Brown /

Lane,

Good calls from Fred and Chris.

You might try to reproduce the rattle by rocking the crank by hand with the plug out, or pedaling on the stand with the pug in or out and the ignition off to see if you can locate the noise.

If it happens at idle, you can try sticking a length of heater hose in your ear, this should make it quieter (just kidding), use the other end to try to isolate the noise.

Ron

Re: Bad rattling

gimmyjimmy /

wadyasay, Dr. Brown?

That's a poorman's stehascope(sp?), you described there, I've done that before on other engines, it really does work. Just make sure a spyder isn't in the hose.

Up your nose with a rubber hose! :-{)

Re: Bad rattling

Ron Brown /

Jimmy,

I am a card carrying member of the AMA so I can dispense this kind of advice.

(American Motorcyclist Association)

Ron

Re: Bad rattling

My ped is a 2000 targ lx....I've checked all external parts on or near the engine and case and i still get the rattle. I do notice that it will stop at idle and if i hold the bike back and rev for a sec and then let off, it will rattle as the engine is slowing down again and stops when it reaches idle. This makes me think it's something in the clutches or such, but like i said, i see no grit in the tranny oil...

Would I screw my warranty if i tore the bitch all the way down? I'd just hate to bust something even tho it is under warranty. Small parts are not a big deal, but i don't wanna damage the case or something serious like that. I gotta depend on this rig to get me to work and my girlfiriend's house; well, that is if i HAD a girlfriend...anyways, you know what I mean.

I just put on a 25 tooth sprocket to get more hill climbing power, and all the parts involved in that action were buttoned down tight.

Any more ideas guys?

Lane

Re: Bad rattling

Hi Lane, Doug here, When you changed to the smaller gear is that when this started? It should have made the chain longer..... any adjustment left? I had a simmilar problem on a 94TT modle, the chain was hitting the swing arm when under torque, look under chain guard on the top of swingarm for evidence. Later Doug D.

Re: Bad rattling

I'm not sure but I think when you add parts like a biturbo and possibly sprockets it may void the warranty. But don't quote me on that, you should look into it, because maybe it's just the 70cc kit that voids the warranty, or do you have one of those too ? I know someone on here has it, just can't remember if it's you...

Re: Bad rattling

Ron Brown /

Lane,

Does this mean you tried what was in my post and by the way, you mention that you checked all the components of your sprocket change. Does this mean the noise started when you did it, or some other mod?

Ron

Re: Bad rattling

Ron Brown /

Sorry Doug, I missed your post, good call.

Ron

Re: Bad rattling

Actually the rattling started right after i changed the tranny fluid at 300 miles. I've since changed it with a different jug of fluid and no diffy. I put the bi-turbo on at about 550 miles and the sprocket on last night at about 700 miles. Maybe the damn thing's just sposed to sound like that and i don't know it...either way, thanks for all the help and suggestions. I'll just run it til it quits than build it back better...that seems to work for my hot rod...he he.

Thanks bunches,

Lane

P.S. The 25 tooth sprocket made very little if any difference in pulling but it did murder the top speed badly. It's like the ratio works exponentially somehow...i don't get it, but then again i don't get a lot of things.

Re: Bad rattling

Hi! I would take the 'ped backl to the dealer so the problem is documented.This almost always extends your warranty rights.Sounds like it could be a `PSP' ,or ' person-stranding problem' and you don't want that on a long trip.It's probably a defect in the clutch mechanism,but those sounds can travel and it could be like what the others said. BYE!

Re: Bad rattling

ok one thing you can test is while it is running and makeing the noise put your hand over the clutch cover in several places and if it muffles the sound the problem would be the bearings at the end of the clutch and if not then it could be the gears meshing and you don't need to worry

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