07 GS500f transmission issue?

[grahamlocklin]

Evening all. Thanks for taking the time to read this.

OK. sooo I bought a GS third hand. 1st owner, a chick, dropped it when it was in her driveway, just a handlebar scratch. 2nd owner a teen just didn't like the wind. 3rd, me. not crazy just like to get a to b.

at 4000km I started to get a sound while starting from a stop. it was a rattle rattle  sound and a bit of a bump feeling. I thought it was me being dumb with the controls.

I took it to the dealer and asked them to give it a once over, oil change, adjustments as required etc and check out this sound. They told me it was fine.

I road it another 500KM and came back to the shop. again its fine they said.

I took it in there the other day with 6300KM on it. They told me I shouldn't be riding it.

Basically now what happens. I put the bike on the center stand, put it in first, start the bike with the clutch held, let the clutch out evenly and I can feel and see the bike jerk a bit and the sound is a rattle rattle clank.

I changed the chain thinking it was damaged. Didn't make any diff.

If the clutch is pulled in or the bike is in N the sound isn't there. It is only there when the tire spins (tire doesn't bind at all). Revs do not matter in this sinario.

However, when the bike is in gear it seems to be fine at higher revs.

Issue again, 1st gear, starting out, rattle rattle ca clank ca clank etc, jerky.

I'm broke and I don't know what to do with this issue.

Anyone have this before or know what it is and a possible fix?

thanks!

Graham.

**forgot to mention it doesn't matter what gear**

[jeremy_nash]

I would pull the sprocket cover off, and turn the rear wheel.  see if the output shaft moves forward or backwards, other than that, IDK

if you put it on center stand, and rotate the rear tire, does it still do it?

[grahamlocklin]

I did a check on the front sprocket and it doesn't have any improper play. I can't get any play out of the shaft there either.

Sadly I can't spin the back tire fast enough to tell if I can get the sound. The noise doesn't happen in neutral just in gear. With the bike on the stand and it in 1,2,3 gears it jerks and clanks at idle. Of course as I bring up the idle the sound get a bit more pronounced and agressive.

[black and silver twin]

It sounds like a problem with the rear wheel or some loose piece back there

[sledge]

I took it in there the other day with 6300KM on it. They told me I shouldn't be riding it.

Did they they explain why they thought you shouldnt be riding it or give you their opinion on what they think the problem is?

[grahamlocklin]

The shops opinion is that there is a problem in the lower end. (what ever that means.

The back wheel spins fine on its own. I checked that when I put on a new chain, hoping that the chain was the issue.

I had the bike up on the center stand later in the evening yesterday and it is definitely a sound coming from the back half of the engine area about where the sprocket is. However, it seems louder on the other side (Brake side). I'll try to get a youtube video posted of it if it stops raining. I keep the bike in a shed.

I'm pretty ticketed about this. It only has 6300KM on it and it has this kind of major issue. I'm sure glad I got to ride it for 3400KM before the 4000$ toy broke. argh. I almost made it to the 1km = 1$ point, almost.

Thanks for your replies, keep them coming.

[sledge]

Sounds like a gearbox issue to me, if the noise is present in all ratios its likely to be a bearing or bush. 

You could try removing the chain from the sprocket and running it through the gears to see if there is any improvement or pull the cover off and look to see if anything is loose around the clutch......but I think its a long shot and that a repair will have to involve major surgery.

[grahamlocklin]

I just called the shop. 80$/hr for them to go in. It would be 500$ for them to get in and put it back together plus any repairs that would be required.

The best guess on costs the guy could give me was a min of 1000$ Canadian.


The rain has stopped video link coming. I'll link my other videos from two keeps ago where I road it out. I can still ride it, it just makes that sound (you will hear it).

Thanks again all.

[lopee]

+1 on removing the chain from the front sprocket. you can run it through the gears with little risk the bike will fall off the center stand and speed off. there will also be less resistance and could shift through all the gears while not on the bike, which could end up bad. the load shoulnt make a difference if there is a prob with the transmission.

[grahamlocklin]

Okay, here are some videos.

The sound!!! at 1min 40sec you can hear it well.
http://www.youtube.com/watch?v=8LdrgXZQo-k

Some other videos from the second last time I took it out. Sorry for the sound but .... its a point and shoot camera. I made these when I was planning to sell the bike, before my wife said she wanted to try.
http://www.youtube.com/watch?v=cn0unyoFJJg  Yes I can hear my Canadian accent and lingo.
http://www.youtube.com/watch?v=91RfcBehehM

As you can see from the above the bike still goes, however, this very serious sound come out 90% of the time. Now more predictably.

Thanks again all.


Edit.

I listened to the video on youtube and you can't really hear it until the end of the clip knocking rattling clanking.

[Allen]

I'm no engineer, but I'm pretty sure thats not supposed to happen.

[mister]

Have you taken the cover off to check out the front sprocket? have you taken the right side cover off to see what you can see there?

How's the oil level? How's the exhaust seal?

Michael

[mullan]

I'm still quite a beginner, so forgive if my idea is silly.  When you changed the chain, did you change the front sprocket too?  Sounds like the initial normal extra pull/stresses on the chain when accelerating is making something spin when it shouldn't (wonder if the sprocket is spinning around it's spindle thingy or if the chain is spinning over the cogs [but then you'd see the chain jumping at the same time I guess....something I couldn't see at 1:40 in your video]?).  And once you're up to speed the stresses are less so everything stays in place better.  Just an idea 

[grahamlocklin]

Front sprocket where it touches the chain looks like new still.

Right side cover where the clutch basket is is coming off next week. (so is the plan)

Mulan, good thought about the shaft where the front sprocket sits being damaged I'll check it out when I take the chain off to do some further testing, I'll also remove the sprocket and check it out. However I couldn't 'feel' any forward/backwards play in it before.

Thanks again for your ideas keep em coming.

[Viperz]

The best guess on costs the guy could give me was a min of 1000$ Canadian.

Where in Canada are you? There are many honest mechanics in Toronto area. Let me know if you're in GTA and I'll send you info on a good local one.

[Viperz]

PM'd you Ken's contact info. He is in your part of Ontario, and has tons of references. Good luck! 

[grahamlocklin]

Just a bit of an update.

I contacted a mechanic in Shannonville the other day and he (Peter) came to take a look at my bike. He checked chain play and made sure the tire rolled freely and some other stuff. He didn't spot or hear anything really wrong with the bike.

Peter tried with me for 20 minutes to get the bike to make the 'sound' without success.

The best guess was that a clip or bolt is loose and bounces around in the case from time to time.

Anyway Peter is going to take the bike and pull the engine out and see what he finds.

I'm going to remove the fairing, drain and filter the oil, and possibly remove the clutch side engine cover to see if I can spot anything. If I do see something I still plan to have Peter take a look.

Thank you everyone for checking my thread. I'll post the findings after the mechanic.

[The Buddha]

GGGGGGGGGGGGOOOOOOOOOOAAAAAAAAAAAAAAAAAAAATTTTTTTTTTTTTTTTTSSSSSSSSSSSSSSSSSSSSS ...
You think its left side and maybe a little forwards of the chain cover ...
Cool.
Buddha.

[grahamlocklin]

Nope. Its the back half, louder on the clutch side (right side). Would GOATS be intermittent?

Come to think of it.... the noise didn't start until after the dealer changed the oil but that could be a coincidence..... and timing to hitting the bump. I wonder if they dropped something in while filling the oil......

[grahamlocklin]

Well its been a while now since I posted this topic and I'm not any closer to solving the issue..... Mind you I didn't take anything apart.

One thing I did notice was the bolts/screws on the top of the value cover were so loose that they spun with my finger and I noticed a good oil spray on the side of the plastics and down the left side of the engine. (again no bad sounds when rev'ing).

I took the bike to a shop (gave up guessing). Shop road it around and things its the stator or rotor! GHOATS it could be.....

I road it the other day to teach my wife to ride on (engine off just me pushing once I got to the parking lot), then road it home. I also road it to the shop. Not a sound, not once, not one clank, nothing. When I got it to the shop the mechanic road it around the parking lot. He did manage to get the sound! YIPPY! The only way to get the sound was to do firm acceleration then break then repeat, once it started a steady acceleration then coasting and the sound could be heard.

Stator is about 150$, flywheel/rotor is about $150.

Mechanic told me he would call me back this week. Hopefully I can get back to his shop and take some pictures to share.

Shop is: Quinte Cycle & Marine in Tyendinaga Mowhawk Territory, 55$hr, no tax. Really nice guys with a professional looking garage.
(Belleville Sport and Lawn is taking care of my V-Strom).