|
|
Post by 1980thumper on May 4, 2007 19:58:16 GMT -5
my chain was a bit too loose and came off today when i was slowing down at a junction, it cracked the cover over the front sprocket and i have noticed that when i hold my rear sprocket with a finger on each flat side of it i can wiggle it a little side to side, surely this is not right? am i risking my life riding this thing?
yours worryingly,
Damo
|
|
|
|
Post by thumperbill on May 4, 2007 23:33:03 GMT -5
Remove the cover and inspect the damage! Hopefully you just broke the mounting lugs on the engine case for the primary sprocket cover without going into the case. I have a bunch of destroyed cases here that have holes in them from exactally the same set of circumstances. Sometimes they break off without any major damage, other times they can leave a dime sized hole.
FYI.... I make and sell engine case savers on ebay to avoid this from happening.
Bill
|
|
|
|
Post by 1980thumper on May 5, 2007 7:07:01 GMT -5
yeah ive just snapped off the lug on the engine case but i have another two bolts to hold it on with, i was more worried about the rear sprocket, does it sound gubbed?
|
|
|
|
Post by chew652 on May 5, 2007 18:01:40 GMT -5
You need to have a little wiggle.Check your front to rear sprocket alignment. Sight along the top of the chain as you spin the wheel and you will see if it coming off the sprocket crooked. Also pull the chain rearward with your fingers off the rear of the back sprocket. The chain should not come off very much. If you can see most of a tooth its time for new stuff.You can actually get away running a too wide chain if your alignment is right.
|
|
uk500
Junior Member
Posts: 47
|
Post by uk500 on May 6, 2007 8:40:48 GMT -5
If the chain has de-railed for an underlying reason other than chain wear/tension it could be potentially lethal, face it if it had happened at 70 MPH instead of slowing down at a junction you might not have been here to talk about this. If you're not sure get it checked out, I don't like the sound of the free side to side play that you described on the rear sprocket.
Take care,,,,,,,,,,,,,,,,UK
|
|
lurch
Full Member
Posts: 217
|
Post by lurch on May 6, 2007 11:25:21 GMT -5
Damo
I have the rear wheel out of my bike at the moment ,there is NO play at all on my sprocket
DO NOT ride this bike until you have had this issue checked out by a professional if your not too sure
LURCH
|
|
|
|
Post by andy on May 6, 2007 14:14:37 GMT -5
damo,lurch is spot on,i've just stripped and rebuilt my back hub following a re-spoke.the haynes manual shows all clearly.give us a call if you need it explaining.
|
|
|
|
Post by chew652 on May 6, 2007 14:53:33 GMT -5
I'm sorry . I read this as the chain moving slightly side to side on the sprocket,not the sprocket itself moving. Thanks for catching that guys.
|
|
|
|
Post by 1980thumper on May 6, 2007 14:53:39 GMT -5
cool, ive just realised the manual i have is for the 77-79 sr500 with the 6spokes wheels, not the wire wheels that i have which means itll be a different hub etc. im going to have a good look at it tomorrow, ill update soon.
Damo
|
|
|
|
Post by 1980thumper on May 8, 2007 8:52:01 GMT -5
okay, heres an update, ive bought a new chain, just waiting for delivery but im still not sure about this wiggling, ive uploaded a short video of it, not sure how easy it is to see the movement though, think you can see it about halfway through best (its only about 30seconds long anyways) and also when i pull the chain back, is the result due to chain wear or sprocket wear or both? heres the vid media.putfile.com/rear-sprocket-and-chainDamo |
|
uk500
Junior Member
Posts: 47
|
Post by uk500 on May 8, 2007 9:51:14 GMT -5
Damo, I've seen the video something is drastically wrong there,,,LETHAL!!!!!!!! And if that's how much movement you get from finger strength imagine how much it could move under the enormous torque delivered from the drive?  ?? Could it be the cush drive rubbers have totally had it ?? I don't know. Take Care,,,,,,,,UK |
|
|
|
Post by 1980thumper on May 8, 2007 10:00:47 GMT -5
im worried because i have to ride the bike the 70 mile round trip to work all this week, i have a new chain ordered but i dont know about where in the uk to get cush drive bearings and rubbers etc etc
am i going to kill myself on this bike?
Damo
|
|
uk500
Junior Member
Posts: 47
|
Post by uk500 on May 8, 2007 10:05:03 GMT -5
There's a strong chance of that if you ride it without getting it fixed,,,,,,,,,,Uk
|
|
|
|
Post by sjef on May 8, 2007 11:23:43 GMT -5
|
|
lurch
Full Member
Posts: 217
|
Post by lurch on May 8, 2007 14:39:10 GMT -5
Damo
For F--K sake , Take the bus or Train to work or throw a sicky this week or you'll die riding that death trap !!!!!!!!!!!!!
Take the wheel out and have a look at the Spocket carrier
If you want I'll strip my wheel out & email you some pics so you know what a good set up looks like ,let me know & I'll do it in the morning (wednesday)
Regards
LURCH (Jim)
|
|
?? Could it be the cush drive rubbers have totally had it 