ADVrider

Go Back   ADVrider > Bikes > Thumpers
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-11-2014, 04:31 PM   #1
Marioxr650 OP
n00b
 
Joined: Aug 2014
Oddometer: 2
Chain not fitting front sprocket? xr650l

Hey guys I am trying to install a new chain + sprockets on my xr. Running a new OEM Honda front sprocket and the chain does not fit properly around it. Both the new chain and old chain will not fit right. I tried the old sprocket(Honda as well) and it fits perfectly. Chain fits around the rear sprocket perfectly. As I feed it around the front sprocket it gets to about 1/2 to 3/4 of the way around it starts popping off, almost like the teeth are spaced wrong, and jams up between the case. Wouldn't have expected this from a factory sprocket.

Any ideas? Im stumped unless there is some trick I am missing/or some sort of manufacturing defect.





Marioxr650 is offline   Reply With Quote
Old 10-11-2014, 05:21 PM   #2
Walterxr650l
Beastly Adventurer
 
Walterxr650l's Avatar
 
Joined: Mar 2006
Location: Donald, Oregon
Oddometer: 1,217
That is normal for the OEM sprocket. Just put it on and run it. It will wear in. Or if that bothers you, buy an aftermarket sprocket.

Walter
__________________
"How much a dunce
That has been set to roam
Excels a dunce
That has stayed at home."
Walterxr650l is offline   Reply With Quote
Old 10-11-2014, 10:40 PM   #3
oldenuf
Gnarly Adventurer
 
Joined: Mar 2010
Location: Port Angeles, WA
Oddometer: 412
doesn't seem right

In the picture there seems to be a rubber ring under the teeth? Is that pushing up on the links? If so you can probably eliminate it. It is probably there to make the chain quieter.

Art
oldenuf is offline   Reply With Quote
Old 10-11-2014, 10:48 PM   #4
GBAUTO
Bambi Assassin
 
GBAUTO's Avatar
 
Joined: Sep 2013
Location: Young Harris, GA
Oddometer: 64
Can you post a pic of the sprockets stacked-old on top of the new. That will give us a better idea if it's a spacing problem or if it's just interference from the rubber cushion.
If the chain is trying to walk off of the sprocket I would not try and run it.
__________________
Spending my time exploring the woods and carving the corners of N. GA/ W. NC
'12 KLX250(351)S
'06 GSXR1000
'03 SV1000S
GBAUTO is offline   Reply With Quote
Old 10-12-2014, 04:21 AM   #5
mcma111
Beastly Adventurer
 
mcma111's Avatar
 
Joined: Jul 2007
Location: San Francisco,Ca.
Oddometer: 11,212
The chain doesn't have to fit all the way around the sprocket. Only as much as when the chain is mounted on the bike which is about 2/3.
__________________
Steve in SF

BMW's
58 R26
79 R100s
91 R100gs

87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project
mcma111 is offline   Reply With Quote
Old 10-12-2014, 07:27 AM   #6
markk53
jack of all trades...
 
markk53's Avatar
 
Joined: Dec 2007
Location: Delaware Ohio
Oddometer: 7,853
I would take both the old and new sprocket and the chain where you bought the sprocket to show them the problem. There is something not right in the part since the chain fits the old sprocket. Bad machining, worn out stamping equipment, whatever - it is bad. Why not be absolutely certain instead of "just run it". I sure as hell would!

That improper tooth fit will wear improperly and will prematurely wear the chain, which will prematurely the rear sprocket.
__________________
Ever get lost? You know, that good kind of lost - come to a dirt road intersection and you have no idea where you are or which way to turn? I like when that happens!

Mark - klx678
95 KLX650C w/Vulcan piston bigbore, Now an 09 KLX250S, selling my 90 Zephyr 550
markk53 is offline   Reply With Quote
Old 10-12-2014, 08:13 AM   #7
Sethro303
Master of Disaster
 
Sethro303's Avatar
 
Joined: Jul 2013
Location: South Central, WA
Oddometer: 273
I zoomed in on the pics and can't see any manufacturer mark or chain size. What brand/size chain did you get?



Sent from my iPhone using Tapatalk
__________________
08 KTM 690 Enduro


http://www.urbandictionary.com/
Sethro303 is offline   Reply With Quote
Old 10-12-2014, 12:08 PM   #8
Antti
Gnarly Adventurer
 
Antti's Avatar
 
Joined: Mar 2003
Location: Finland
Oddometer: 166
Quote:
Originally Posted by walterxr650l View Post
that is normal for the oem sprocket. Just put it on and run it. It will wear in. Or if that bothers you, buy an aftermarket sprocket.

Walter
+1
__________________
R1100GS, 690 Enduro, R80G/S project bike.
Antti is offline   Reply With Quote
Old 10-12-2014, 01:27 PM   #9
oldenuf
Gnarly Adventurer
 
Joined: Mar 2010
Location: Port Angeles, WA
Oddometer: 412
more of same

Quote:
Originally Posted by Antti View Post
+1
Works for bolts also, just get a bigger wrench and turn it in till it fits.
oldenuf is offline   Reply With Quote
Old 10-12-2014, 06:36 PM   #10
davesupreme
grand poobah
 
Joined: May 2011
Location: palm harbor, fla
Oddometer: 1,458
you got the wrong size chain..... 520?.....
davesupreme is offline   Reply With Quote
Old 10-12-2014, 08:31 PM   #11
africa twin
Gnarly Adventurer
 
Joined: Feb 2008
Oddometer: 183
I agree that you probably have the wrong size chain. Most dirt bikes shops sell what is described as a narrow gauge chain even though it may be the right pitch and size for example 520 or 530. MX bikes have slightly thinner sprockets to save weight. The reason the old sprocket fits is because it's normal for a sprockets teeth to wear a little thinner with time. If you look at the box the chain came in it will probably say narrow somewhere on it. I just went through exactly the same thing on an XR650L
africa twin is offline   Reply With Quote
Old 10-12-2014, 08:42 PM   #12
Antti
Gnarly Adventurer
 
Antti's Avatar
 
Joined: Mar 2003
Location: Finland
Oddometer: 166
Quote:
Originally Posted by oldenuf View Post
Works for bolts also, just get a bigger wrench and turn it in till it fits.
Thats what I normally do :)
__________________
R1100GS, 690 Enduro, R80G/S project bike.
Antti is offline   Reply With Quote
Old 10-13-2014, 10:20 AM   #13
markk53
jack of all trades...
 
markk53's Avatar
 
Joined: Dec 2007
Location: Delaware Ohio
Oddometer: 7,853
Quote:
Originally Posted by mcma111 View Post
The chain doesn't have to fit all the way around the sprocket. Only as much as when the chain is mounted on the bike which is about 2/3.

Do you any of you "run it anyway" guys honestly have a clue mechanically? The chain should wrap and fit all the way around the sprocket if both are good. No 2/3 bullshit. All the way. That is mechanical FACT!

I take it you'd weld on the shifter if the splines didn't fit too, cross thread an SAE thread bolt in if you don't have a metric one. Makes me think of the farmer who cranked in a square head wood bolt into the axle adjuster nut on an old ATC200 Big Red...

If the chain doesn't fit all the way around there is a machining error in the sprocket or the chain is wrong/bad. It is not fitting the teeth right, it will prematurely wear the sprocket and the chain, also doing the same to the rear sprocket. If the chain fits the rear sprocket all the way around, plus a fit on the old sprockets then clearly the front sprocket is junk. Why ruin your equipment with bad product?
__________________
Ever get lost? You know, that good kind of lost - come to a dirt road intersection and you have no idea where you are or which way to turn? I like when that happens!

Mark - klx678
95 KLX650C w/Vulcan piston bigbore, Now an 09 KLX250S, selling my 90 Zephyr 550
markk53 is offline   Reply With Quote
Old 10-13-2014, 11:02 AM   #14
itsatdm
Beastly Adventurer
 
itsatdm's Avatar
 
Joined: Jun 2004
Location: Nor Ca.
Oddometer: 4,613
Does the chain fit the rear sprocket? It should be a 520 chain, it may be a 525 or 530 chain in the wrong box. My DID chain has the size stamped onto some of the chain plates. Maybe you will get lucky.

Roller Width (E)
mm




Chain pitch inchRoller Width (E) inch
41512.74.761/23/16
42012.76.351/21/4
42812.77.941/25/16
52015.8756.355/81/4
52515.8757.945/85/16
53015.8759.535/83/8
53215.8759.535/83/8
63019.059.533/43/8

http://www.gearingcommander.com/

If so, the bigger diameter rollers would not seat as deep in a new sprocket and effect how it sits when put in place. The last 2 boxes are chain pitch and roller width (diameter).
__________________
BMW Motorrad USA customer service: "We make superior motorcycles and continue to improve them."

itsatdm screwed with this post 10-13-2014 at 11:14 AM
itsatdm is offline   Reply With Quote
Old 10-13-2014, 11:35 AM   #15
Auto-X Fil
Studly Adventurer
 
Joined: Feb 2013
Location: Montrose, PA.
Oddometer: 574
That's certainly the wrong chain/sprocket combo.

Lay the stock chain against the old one and check spacing and bushing size.

Lay the sprockets on each other and check spacing.
Auto-X Fil is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 09:28 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014