Hello!
whats the problem?
- If im driving 50 kp/h and let go of my handlebars it pulls to the left a bit. not consistently, but like for a second, then not, then a little pull, then not.
- driving 130 kp/h the rides very uncomfortable. a lot of vibrations.
some background info
So, i changed my wheels. from pirelli diablo demon (or so) in the front and a dunlop fronttire in the back to michelin pilot streets front and back.
Bought em on the internet, they came on nice black rims.
The seller said they were fine (offcourse :laugh:) and he sold these cause he blew his engine. Seeing that there were 5 motorcycles taken apart in his backyard, i believe him, and think the rims and tires should be fine.
What did i do
I simply took out the front and back wheel assembly, and replaced em (incl. brake discs and rear cog) as simple as that.
What could be the cause of my problems? Something is should do when replacing wheels?
Sounds to me like maybe the front tire isn't in the bead of the wheel properly. Look around the very edge of the wheel at the tire, there should be a thin line of rubber that goes the entire way around. If that little line isn't the same distance away from the rim, your tire isn't beaded fully.
Did you balance the wheels / tires?
It seems the tires are on fine. I didnt get the wheels balanced though. The previous owner rpde around with em fine. Any other ideas?
Front end not quite bolted in evenly on the axle or spacer wrong? ... rear end not straight and true with the swingarm? Giving you a thrust alignment issue?
Interresting.. Do you know where i get an exploded view, or even better, a how to to change rims on the gs500e?
I think i recognise what you call a thrust alignment issue.
Edit: Found rearaxle exploded view:
(http://cdn.partzilla.com/diagram/suzuki/07/01/0052.png)
Also the front:
(http://cdn.partzilla.com/diagram/suzuki/07/01/0047.png)
It's easy to accidently lose part number 9 from the rear wheel when reassembling. Bad news if you ride very long without it.
That plastic cap? thats still on :)
I just walked my bike home the last couple of meters, and noticed a strange rattle coming from my small sprocket. Ill have a look at that tomorrow.
Maybe thatll explain some things.
No, #9 is an axle spacer. Without it, your wheel bearing can work its way out. And I don't think a noise from the front sprocket could cause vibration in the front end.
I'm still going with some type of balancing issue, and / or the rear wheel isn't straight in the swingarm.
Yes, number 9 on the REAR WHEEL. It's a metal spacer with one cone shaped end and one cylinder shape end. You wouldn't be able to see if it's there without taking it apart. Also if it's not there you might notice that you spend a lot of time trying to torque the rear wheel axle down to spec because there is extra space that the swingarm is able to squeeze down. Check that out and get back to us.
Yes, check for spacer 9 first. If it's missing the cush hub bottoms in the rubber cushion area of the wheel causing the sprocket to miss align, could account for the noise from the front sprocket. The cush bearing and right wheel bearing are heavily side loaded carrying the full torque load of the axle nut tightening normally carried by the spacers. The wheel bearing fails ultimately locking up the wheel. :cry: But I managed to put the bike on the stand and get wheel free but wobbly and make it home very slowly that day. :thumb:
There could well be a wheel balance problem too as Rich suggests.
Hm yes, i see.
Spacer no. 9 is positioned between the two wheel bearings, isnt it? how could i lose that one, if the bearings were in place all the time?
I mean, ill check it out, but i can't untill tonight (at work now) and would like to be able to try or check as much as possible :)
I can get my tires checked fairly cheaply (like 5 euro's or something). but since i work fulltime, and i have to take the complete rim to the shop, of my commuters bike.. I will have it balanced, just need to find out when i can have it done. the front tire seems fine now. brake's evenly. no weird stuff there.
I will check for part no. 9 and put on my old rear sprocket and breakdisk from my other rim. just to exclude as much as possible.
Not exactly......part #9 is between two bearings, but one is the bearing in the sprocket carrier. Usually what happens is somebody takes the rear sprocket carrier off the wheel and #9 is stuck inside. When the carrier is sat on the floor and the sprocket is on top, #9 falls out, and the sprocket carrier is picked up and reinstalled.....without the #9 spacer.
okay okay.
I never removed the sprocket carrier though. It came with a brake disk and rear sprocket, wich im still using right now. Ill change them out for the ones on my old rims, see if that makes a difference.
Could be possible that the previous owner lost the spacer. Just something that is worth checking.
IN my lunchbreak i disassembled and reassembled everything with a years old motormechanic and carmechanic to have them oversee the assembly of the wheel. they quickly checked everything (chain tension, straightness of the tire, things like that.)
no.9 was present by the way ;) If this doesnt fix it, ill go ahead and mount the old brake discs i think. this may make a difference.
That's good that part #9 was there. If it wasn't, I would say that you likely would have to replace your rear wheel bearings. Did you check the bearings in the new wheels? Put them on an axle between two jack stands and spin the wheel and listen. Also, once you get the wheel on the bike, check for any play at all in the wheel bearings.
I checked the bearings by having it all mounted, and then try to see if the wheel would move. also let the technicians at my work check it, and they sayd that it seems fine.
Once you have a problem with spacer 9 being missing you get in the habit of always making sure it's there before putting a rear wheel back on your bike. It can been seen on the assembled wheel simply by pulling the outer small spacer from the grease seal on the sprocket side with your finger tip and you can see the end of it inside the cush bearing bore.
Again it's problably time to get the wheels on a balancer machine and spin them to balance. A serious vibration at 80+ mph most likely is a balance problem or a tire not properly seated like Rich pointed out above, or possibly a tire with ply seperation not as likely but possible. These things can be seen real quick with the wheel spinning on the balancer machine.
I've taken note on all the things you guys say! If it isnt fixed now (i get to ride home in about an hour) ill most def get it to garage to get it balanced.
Thanks everyone! :D i think i've got enough to go on for now :)
Look at this! :0 the red and yellow line are straight (relative to the middle of the handlebars and the back bracket)
the wheel seems really offlined. is this correct?! :0
(https://imagizer.imageshack.us/v2/288x677q90/673/8Sa2nl.jpg)
I don't think you can tell from a picture like that whether the alignment is off. The ways I've seen involve fishing line around the back tire. Just do a quick google search of "motorcycle tire alignment" and it will yield all the resources you need.
Yes, there are too many factors that come into play that make a picture deceiving... Has to do with a 2d image of a 3d world... if you were looking all on the same plane, its possible... but the handlebars are on a different plane than angle you lining up with your wheel. Think of a standard laser level - its only level on the wall you level it on. Yes the line can end up on several walls, but those other lines are not level - you try to use those and you'll end up with crooked tires on your walls! ;)
:cheers:
- Bboy
That line in the pic is not straight either.... I can see the steps in it! :icon_eek: ... Only a degree or so but it isn't straight! ;)
The line isbstraight, just not completely vertical. Nevermind. Bought myself some wire, tape and a ruler. Im going to outline this afternoon!
Just for the record: the wheels should be in perfect line, right? Some bikes have the wheels offset i read here and there.
Quote from: Krav on October 01, 2014, 05:18:36 AM
The line isbstraight, just not completely vertical. Nevermind. Bought myself some wire, tape and a ruler. Im going to outline this afternoon!
Just for the record: the wheels should be in perfect line, right? Some bikes have the wheels offset i read here and there.
Yes, they should be straight. Should be the same clearance from a wire coming straight from the back tire on both sides of the front tire and the back tire.
I eyeballed it a bit yesterday, with some elastics strings.
Can't say that it was a very good measurement, but im quite sure that it was off by a fair bit.
Hopefully i can pinpoint it this afternoon :)
So, after measuring with bright yellow string and some more stuff, i found out that the backwheel alignment was out of place by a couple of turns on the adjusters.
I didnt know that so little adjustment made such a diffrence!
A LOAD of thanks to you guys for helping me out! My rides a lot better now!! :D
When I am aligning the rear wheel or taking out excess chain slack...I turn the adjuster nut 1/12 turn at a time!!!
Not one half....one twelfth...
From flat to point on nut...
Cookie
Quote from: Krav on October 01, 2014, 02:47:27 PM
So, after measuring with bright yellow string and some more stuff, i found out that the backwheel alignment was out of place by a couple of turns on the adjusters.
I didnt know that so little adjustment made such a diffrence!
A LOAD of thanks to you guys for helping me out! My rides a lot better now!! :D