Shock keeps rubbing my rear tire off stand only

[shadowman]

My rear shock is rubbing my back tire after I take my scooter of the main stand. It looks fine on the stand with plenty of clearance, but once I take it off the stand, it is either touching the tire or close to it.

I clearly can see a ring on the tire from the rubbing. I tried twisting the shock spring to where the gaps wouldn't touch the tire, but after a few bumps on the road it won't work that way.

I tightened my motor mounts tight, but maybe it's off center or something. My shock is tight. I wonder if I have a bent frame or something.

I've never had this problem before, until I put the engine back on recently. Any replies appreciated. Thx.

[tomcas]

Stupid question. Did you put the shock on the correct side of the bracket? Even stupider question. Did you put the shock on upside down?

[Fox]

Assuming the shock is installed correctly and the engine mounting bolt is tight, it sounds to me like a classic example of worn out, sloppy engine mount bushings allowing the engine to swing/twist sideways in the frame. It sits straight on the center stand because there is no weight on the back wheel but having a single shock on one side causes an uneven force to the engine mounts when the scooter is sitting on the back wheel. This force is increased every time you hit a bump in the road.


The bushings are here:
www.partsforscooters.com/151-131-Crankcase_Front_mount_bushing_qmb139

The rear one for the shock may be bad too:
www.partsforscooters.com/151-128-Crankcase_rear_bushing_qmb139?sc=9&category=464

[shadowman]

Nov 4, 2010 20:09:12 GMT -5 tomcas said:

Stupid question. Did you put the shock on the correct side of the bracket? Even stupider question. Did you put the shock on upside down?

I unhinged the shock at the bottom only. The mating part of the lower part of the rear shock, slides over the mounting piece of the engine.

Although there is a thin piece of metal that slides in between the lower left side of the shock/engine where the bolt slides through, and that hooks onto the rear tire guard. Maybe I should try hooking that back on and see if that helps. I left it off because my rear tire guard is junk.

Thx for the replies and link guys!

I have my body and head off the scoot looking at some other things, so now would be a good time to look since it's easier to see.

[2strokd]

I agree with Fox!
Ive seen it a few times...

[shadowman]

How long do the bushings usually last. I mean, I ride it quite a bit.

I've had the same bushings for... about 3 years and have about..25 kilometers.
Just curious, and thx.

[shadowman]

Ok I found the problem--- I was looking in the wrong spots.

I'm not sure what went wrong here yet, because I've never taken this bolt out, nor do I know what broke on the inside.

I'll post a pic/video in a second.

[shadowman]

Ok, here it is. Hopefully this won't be too hard to find/replace. Look at the other bolt just left of the motor mount. You can see it move as I lift up the scooter by the rear rack.

www.flickr.com/photos/31968595@N04/5170814467/

It's just the left side, I checked the bolt on the opposite side and the frame doesn't move.
This sux. Lol.

Not sure what keywords to use to search or even where to find parts for that location on my scooter. Frame? lol. I'm trying though. Hopefully I'm not SOL.

It's gotta be some sort of bushing. Something like this maybe:
www.chinesemotorcyclepartsonline.co.uk/partno_30711_1870_BT49QT-9_BT49QT-9%28BTM%29.php

[90GTVert]

Scrappy has a GY6 engine mount bushing kit. Not 100% sure it's what you need, but you could always call or email them to be sure.
www.scrappydogscooters.com/Replacement_Parts.html

PFS carries quite a few bushings and they give measurements for them all. If you measure the old one you could probably find the right one here.
www.partsforscooters.com/All-Parts?search=bushing

[shadowman]

Hey thanks!

Maybe they can find one even if they don't carry them.

Hopefully I'll have it all done within a week. It might be awhile. lol.

[Fox]

The bushing kit scrappy sells on this link should be the right ones:
www.scrappydogscooters.com/Replacement_Parts.html

It's probably a PITA to change the bushings.

Here's a whole new mount for $18+shipping:
www.partsforchinesescooters.com/asp/gmi/?choice=showCategory&category=102&classid=15109

[shadowman]

Nov 13, 2010 10:58:53 GMT -5 Fox said:

The bushing kit scrappy sells on this link should be the right ones:
www.scrappydogscooters.com/Replacement_Parts.html

It's probably a PITA to change the bushings.

Here's a whole new mount for $18+shipping:
www.partsforchinesescooters.com/asp/gmi/?choice=showCategory&category=102&classid=15109

I just took that mount off a few minutes ago, I was at work all day--thx for the reply, again.

I might as well replace both, if I can find them. I emailed partsforchinese at their site, but not sure if it went through. They have those "on site email" contact(little popups), and it flashed something all "technical" but who knows. I asked them if they were already installed, and/or if they have them period. I did take note that the big fat one that you mentioned earlier, is not in the picture, so I would assume the others aren't. They do have another contact email--- a real email I mean, that I'm about to try. (EDIT: I just emailed Scrappy and PFS, too)

These bushings are about the same size as the motor mount bushings, except they are about at least twice as long. I haven't measured them--- I could try the length/width and diameter while they are still in the mount. Kinda iffy, but I don't think I have a pipe/tube long enough on hand(this late at night) to try.

I guess I can find a long skinny metal pipe, feed it through one of the bushings, and knock them out gradually with a mini-sledge hammer. They seem almost soft-like, not sure if they are that way when new though---if they are, then it might suck getting them back in, I'll just take it easy on them.

EDIT: When I find out the true size of these, and if they are the exact same diameter as the regular motor mounts, I may give them a try anyway---if I can't find them. I'll shove 2 on each side if I have to..lol

EDIT: I may try this place too, not sure:
www.tankscooterpartswholesale.com/chassis-frame-bushings-c-337_440.html

[Fox]

I think you are better off just getting a new mount already assembled.

Here's another link:
www.scooterpartspro.com/index.php?subcats=Y&type=extended&status=A&pshort=Y&pfull=Y&pname=Y&pkeywords=Y&search_performed=Y&q=engine+mount&x=0&y=0&dispatch=search.results

[shadowman]

Nov 14, 2010 4:11:52 GMT -5 Fox said:

I think you are better off just getting a new mount already assembled.

Here's another link:
www.scooterpartspro.com/index.php?subcats=Y&type=extended&status=A&pshort=Y&pfull=Y&pname=Y&pkeywords=Y&search_performed=Y&q=engine+mount&x=0&y=0&dispatch=search.results

:cheers: :rockon:

[shadowman]

Here's my situation. This is my engine mount/hanger:



Note where both pics are circled--the part that is supposed to slide onto the outside of the motor mounts.

Here is the only style I can find online anywhere:



I don't think it's do-able without some modification--- and that's beyond my skills/tools anyway. I can get one used already with the bushings, which I probably will, but for future reference if I ever need one, not sure where to get it. As of now, it's almost like I have to get the bushings if ever needed again, until I find out. I'm still searching, I'll find it.

However, partsforchinese emailed me back and said they have the bushings---no other parts place has it or has told me they can get them. Hard to tell without looking at them, I have a hard time trusting people like that..lol.

I measured the width: and it's 36mm wide, 30mm outer dia, 10mm inner dia.
So that's what I have to work with. Emailing them back to make sure, since the piece IS different, just to make sure.