Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Yamaha Tech

Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Contact Overland Solutions for all your custom modifications and setup for overland travel.

Calendar Contest Voting is now CLOSED. Results to be posted shortly.


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10 Jun 2004
jim jim is offline
Gold Member
Veteran HUBBer
 
Join Date: Aug 2003
Location: Cape Town South Africa
Posts: 229
Front sprocket wearing strangely...

Im in Tanzania at the moment and about 1000km ago i checked my front sprocket. Firstly its wearing quite badly in the usual sense, that is the teeth on one side are wearing. Though this is understandable what concerns me is the wear Ive noticed on the engine side of the sprocket.. Its as though the chain is wearing away at the thickness of the sprocket on that side. The rear sprocket and chain seem fine.
I have a new set, but also a long way to go so Ive flipped my front, with washers under lock plate to make up for raised lip.
Any ideas or comments?
Jim
PS so far done about 9000km on this set.
__________________
"If we don't find something good at least we will find something new." Voltaire
Reply With Quote
  #2  
Old 11 Jun 2004
Grant Johnson's Avatar
HU Founder
Veteran HUBBer
 
Join Date: Dec 1997
Location: Vancouver BC Canada
Posts: 4,471
Have you had a good look at the chain alignment?

Looking from the rear, you may see that the chain is misaligned. Could be simple wheel misalignment, in which case make sure the wheels are in alignment and the chain should follow. DO NOT trust the chain adjuster marks. See article in HU Tech section on chain alignment for lots of details.

Finally, could be bent frame/swingarm, in which case live with it for now as long as the bike rides ok otherwise. DO check for cracks in the frame / swingarm.

Turning the front over is a good fix for now, but you need to find out why it's happening.

------------------
Grant Johnson

Seek, and ye shall find.

------------------------

One world, Two wheels.
www.HorizonsUnlimited.com
__________________
Grant Johnson

Seek, and ye shall find.

------------------------

Inspiring, Informing and Connecting travellers since 1997!
www.HorizonsUnlimited.com
Reply With Quote
  #3  
Old 11 Jun 2004
Grant Johnson's Avatar
HU Founder
Veteran HUBBer
 
Join Date: Dec 1997
Location: Vancouver BC Canada
Posts: 4,471
Last thought - re raised lip - sure you had the sprocket right way round to start with?
__________________
Grant Johnson

Seek, and ye shall find.

------------------------

Inspiring, Informing and Connecting travellers since 1997!
www.HorizonsUnlimited.com
Reply With Quote
  #4  
Old 11 Jun 2004
Registered Users
Veteran HUBBer
 
Join Date: Aug 2002
Location: Hendrik Ido Ambacht, Holland
Posts: 360
I used to have the same problem. I always use original Yamaha sprocket which has a separate spacer ring on the engine side, contrary to the imitation ones which come with a flange spacer fixed to the sprocket. Sizes [read : width] are not always the same. So I started mounting thin additional spacer rings to position the sprocket away from the engine, which solved the problem. And yes, I always trust the chain adjuster markings on the swingarm, after once having measured the straight position of both wheels compared to each other.

------------------
Fred, XTZ660, Holland.
__________________
Fred, XTZ660, Holland.
Reply With Quote
  #5  
Old 14 Jun 2004
Registered Users
Veteran HUBBer
 
Join Date: Jan 2001
Location: Stockholm
Posts: 651
My two cents: I have this on my Tenere and a freidn of mine also on his. Absolutely no worries for this bike. Chains still last very long.

Auke
__________________
Auke
http://aukemarieke.blogspot.com
Reply With Quote
  #6  
Old 14 Jun 2004
Registered Users
Veteran HUBBer
 
Join Date: Aug 2002
Location: Hendrik Ido Ambacht, Holland
Posts: 360
Maybe, but this situation definitely eats the front sprocket, so do something about it like I did.

p.s. not only because in principle I disagree with my friend Auke!

------------------
Fred, XTZ660, Holland.
__________________
Fred, XTZ660, Holland.
Reply With Quote
  #7  
Old 15 Jun 2004
jim jim is offline
Gold Member
Veteran HUBBer
 
Join Date: Aug 2003
Location: Cape Town South Africa
Posts: 229
Thanks for all the Info!
Ive checked everything i can think of and it remains a mystery. I guess i will have to live with it...
__________________
"If we don't find something good at least we will find something new." Voltaire
Reply With Quote
  #8  
Old 12 Apr 2007
Registered Users
New on the HUBB
 
Join Date: Apr 2007
Location: Cowra NSW Australia
Posts: 5
Firstly, sorry for jumping in on this so long after it was initially posted, but I have just changed the front sprocket on my 1999 XTZ660 from a 15T to a 16T to try and drop the cruising revs, and noticed something unusual with my CS sprocket setup.

The locking plate for the nut on the countershaft was not engaging with the splines on the shaft, which basically rendered it useless. This concerned me a little as I purchased the bike second hand and the plate appeared to have been 're-used' more than a couple of times. Since buying the bike, I have done about 5000km and it has not been a problem at all (it was still attached to the bike!)

On removing the sprocket, I noticed the reason for it. There was a spacer about 4.3mm thick between the sprocket and the oil-seal cover which I was not able to find on my spare-parts CD. (Having said that, my CD is for the earlier 1996 model XTZ660.) This spacer had the effect of moving the sprocket further away from the crankcase and subsequently not allowing enough of the splines to engage with the locking plate. I was searching for why my bike would have this spacer when I came across this thread. The spacer appears to be a factory addition, it has machined grooves for the splines...perhaps they recognized this alignment problem and corrected it on the later model bikes? Anyway, no problems with abnormal wear on the sprocket, but no security locking washer for CS sprocket.

Hope this sheds some more light on the subject. If anyone has an alternative for securing the sprocket without the washer I'd be keen to hear about it. Otherwise it is going to be lotsa Loctite.

Last edited by StuartXTZ; 12 Apr 2007 at 11:44.
Reply With Quote
  #9  
Old 16 Apr 2007
Registered Users
Veteran HUBBer
 
Join Date: Apr 2003
Location: Cape Town, South Africa
Posts: 305
The spacer serves with a different (narrower) sprocket.
Many aftermarket sprockets replace the washer like the wide previous model sprockets did.
You have to use the washer to secure the nut. Loctite does not do the job.
I saw the problem last friday on a 2002 XT600. He lost his nut somewhere in the bundo the previous weekend leaving him stranded.
Reply With Quote
  #10  
Old 16 Apr 2007
Contributing Member
Veteran HUBBer
 
Join Date: Oct 2002
Location: montana usa
Posts: 519
Lost nut

I once lost the retaining nut on the countershaft of a 550. I used a peice of strap metal clamped to the frame with hose clamps. I then bent the metal to press against the outside of the countershaft and keep it pressed in on the shaft so I didn't loose too much oil. On my bike I lost the use of the clutch but I made it to someplace where I could get another nut.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 Registered Users and/or Members and 1 guests)
 
Thread Tools
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


 
 



HU DVD Spring Special!

Buy the Achievable Dream Collectors Set and get Road Heroes Part 1 FREE!

Achievable Dream - The Whole Enchilada!

Cooped up indoors in crap weather? Binge watch over 20 hours of inspiring, informative and entertaining stories and tips from 150 travellers! Check it out at the HU Store! Remember to order them both and use Coupon Code 'BoxSet+' on your order when you checkout.


What others say about HU...

"I just wanted to say thanks for doing this and sharing so much with the rest of us." Dave, USA

"Your website is a mecca of valuable information and the DVD series is informative, entertaining, and inspiring! The new look of the website is very impressive, updated and catchy. Thank you so very much!" Jennifer, Canada

"...Great site. Keep up the good work." Murray and Carmen, Australia

"We just finished a 7 month 22,000+ mile scouting trip from Alaska to the bottom of Chile and I can't tell you how many times we referred to your site for help. From how to adjust your valves, to where to stay in the back country of Peru. Horizons Unlimited was a key player in our success. Motorcycle enthusiasts from around the world are in debt to your services." Alaska Riders


contest pic

10th Annual HU Travellers Photo Contest is on now! This is an opportunity for YOU to show us your best photos and win prizes!

NEW! HU 2014 Adventure Travel T-shirts! are now available in several colors! Be the first kid on your block to have them! New lower prices on synths!

HU 2014 T-shirts now in!

Check out the new Gildan Performance cotton-feel t-shirt - 100% poly, feels like soft cotton!


What turns you on to motorcycle travel?


Global Rescue, WORLDwide evacuation services for EVERYONE

Global Rescue is the premier provider of medical, security and evacuation services worldwide and is the only company that will come to you, wherever you are, and evacuate you to your home hospital of choice. Additionally, Global Rescue places no restrictions on country of citizenship - all nationalities are eligible to sign-up!




New to Horizons Unlimited?

New to motorcycle travelling? New to the HU site? Confused? Too many options? It's really very simple - just 4 easy steps!

Horizons Unlimited was founded in 1997 by Grant and Susan Johnson following their journey around the world on a BMW R80 G/S motorcycle.

Susan and Grant Johnson Read more about Grant & Susan's story

Membership - help keep us going!

Horizons Unlimited is not a big multi-national company, just two people who love motorcycle travel and have grown what started as a hobby in 1997 into a full time job (usually 8-10 hours per day and 7 days a week) and a labour of love. To keep it going and a roof over our heads, we run events (22 this year!); we sell inspirational and informative DVDs; we have a few selected advertisers; and we make a small amount from memberships.

You don't have to be a Member to come to an HU meeting, access the website, the HUBB or to receive the e-zine. What you get for your membership contribution is our sincere gratitude, good karma and knowing that you're helping to keep the motorcycle travel dream alive. Contributing Members and Gold Members do get additional features on the HUBB. Here's a list of all the Member benefits on the HUBB.



Books & DVDs

amazon

All the best travel books and videos listed and often reviewed on HU's famous Books page. Check it out and get great travel books from all over the world.


Motorcycle Express for shipping and insurance!

Motorcycle Express

MC Air Shipping, (uncrated) USA / Canada / Europe and other areas. Be sure to say "Horizons Unlimited" to get your $25 discount on Shipping!
Insurance - see: For foreigners traveling in US and Canada and for Americans and Canadians traveling in other countries, then mail it to MC Express and get your HU $15 discount!






All times are GMT +1. The time now is 11:11.