Go Back   Horizons Unlimited - The HUBB > Technical, Bike forums > Yamaha Tech
Sprocket bolts Sprocket bolts
Register FAQ Calendar Search Today's Posts Mark Forums Read
Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Ellen Delis, Lagunas Ojos del Campo, Antofalla, Catamarca

I haven't been everywhere...
but it's on my list!


Photo by Ellen Delis,
Lagunas Ojos del Campo,
Antofalla, Catamarca



Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 3 May 2010
Registered Users
Veteran HUBBer
  
Join Date: Dec 2009
Location: Birmingham, UK
Posts: 126
Sprocket bolts
My sprocket bolts have stripped the threads getting an old sprocket off and are covered in loctite. I have got them all out and cleaned up the sprocket carrier, but need new bolts.

Can I just replace them with a standard steel bolt or do I need to find hi-tensile bolts with a suitable length non-threaded shoulder?

Thanks

Reply With Quote
  #2  
Old 3 May 2010
Registered Users
Veteran HUBBer
  
Join Date: Dec 2008
Location: Denmark
Posts: 1,417
I'd just pic something up at the hardware store.
Reply With Quote
  #3  
Old 3 May 2010
*Touring Ted*'s Avatar
Contributing Member
Veteran HUBBer
  
Join Date: Jul 2005
Location: Wirral, England.
Posts: 5,656
You really want hi-ten steel on load bearing items. There's A LOT of different forces and pretty high stresses on your sprocket.

If you want to hold your transmission together with chocolate soft cheap bolts, then you're asking for trouble.

They just maybe ok for the life of the bike but is it really worth the risk for a few extra quid.
__________________
Did some trips.
Rode some bikes.
Fix them for a living.
Can't say anymore.
Reply With Quote
  #4  
Old 4 May 2010
Registered Users
HUBB regular
  
Join Date: Aug 2006
Location: UK
Posts: 45
+1 .... use Hi-ten
Reply With Quote
  #5  
Old 4 May 2010
gixxer.rob's Avatar
Registered Users
Veteran HUBBer
  
Join Date: Mar 2008
Location: Back in Melb
Posts: 287
Are the standard bolts Hi Ten ?
I think the standard bolts are mild steel (what does it say on the bolt head ?) due the cush drive taking alot of the sharp, sudden forces during hard gear changes and similar behaviour.

But the others are correct Hi tensile would be better and last longer, well longer than the sprocket anyway.
Reply With Quote
  #6  
Old 4 May 2010
Super Moderator
Veteran HUBBer
  
Join Date: Jul 2007
Location: Bellingham, WA, USA
Posts: 3,903
Yah, look at the head of the bolts and replace with whatever was originally used. FWIW, I've got twice as many bolts on my KLR, and that might mean something (like, for example, that there's more stress on that attachment than you might suspect), which in itself suggests erring on the side of more thorough rather than less.

I'd answer differently if you were somewhere in the middle of nowhere in the Developing World....but you're not, right? Do you really want to ride that bike around all over the back of beyond wondering whether the strange new vibration you're feeling is related to using junk bolts on your rear sprocket? I didn't think so.

Mark

(from somewhere in the middle of noplace in particular, Bahia, Brazil)
Reply With Quote
  #7  
Old 4 May 2010
Grant Johnson's Avatar
HU Founder
Veteran HUBBer
  
Join Date: Dec 1997
Location: BC Canada
Posts: 7,226
There's a big tip in what you said - the original bolts threads are stripped and covered in Loctite - seems to me the manufacturer was worried about them failing in some way.

For future reference - if a bolt has been heavily loctited use a little heat to break the seal, then they come off easier and can probably be reused, unless the manufacturer specifically says no. On an average trailbike, that's unlikely, on the latest crotch rocket you'd be surprised how many bolts are use once.

I tend to buy factory bolts if they're in any way special, or if they're standard looking but there is a question of strength involved, I just buy the very best I can find and don't worry about it. A cheap junk bolt may be 20 cents, a good one 30 and the best 40 cents. Easy choice for me.

On my own bike the only "ordinary" bolts hold on the licence plate, everything else is the best I can get.

Edit: Correction - I just checked - they're Grade 8's on the plate.
__________________
Grant Johnson
Seek, and ye shall find.
------------------------
Inspiring, Informing and Connecting travellers since 1997!
www.HorizonsUnlimited.com
Reply With Quote
  #8  
Old 4 May 2010
Registered Users
Veteran HUBBer
  
Join Date: Dec 2009
Location: Birmingham, UK
Posts: 126
Thanks for all the replies folks. There is no marking on the head as it's not a bolt. It's a threaded stud and a nut.

Somebody has since explained to me why they use studs not bolts though

"Because a bolt moves with respect to the thread as you apply torque increasing risk of tearing metal.

Stud, threads are stationary, you apply torque to nut so apply direct tensile force to metal of threads rather than combined tensile/surface traction (or frictional shear or whatever you want to call it)"

That makes sense to me so I'm going to stick with the OEM studs and order some from a Yamaha dealer.

Thanks again everybody.
Reply With Quote
  #9  
Old 4 May 2010
Registered Users
Veteran HUBBer
  
Join Date: Jan 2008
Location: St Louis, MO
Posts: 124
Quote:
Originally Posted by -ralph- View Post
That makes sense to me so I'm going to stick with the OEM studs and order some from a Yamaha dealer.

Thanks again everybody.
Thats what I would have done. OEM as much as possible.

When I start thinking of replacing hardware with something thats stronger. I always ask myself...whats the next part that could fail in the assembly if the stronger bolts don't break. Sometimes those soft bolts act kinda like a fuse in an electrical system. Sure bolts shear off at the least convenient times...but I rather have them shear than break the bosses that they tread into on the bikes frame.

daryl
Reply With Quote
  #10  
Old 4 May 2010
*Touring Ted*'s Avatar
Contributing Member
Veteran HUBBer
  
Join Date: Jul 2005
Location: Wirral, England.
Posts: 5,656
Quote:
Originally Posted by dlh62c View Post
Thats what I would have done. OEM as much as possible.

When I start thinking of replacing hardware with something thats stronger. I always ask myself...whats the next part that could fail in the assembly if the stronger bolts don't break. Sometimes those soft bolts act kinda like a fuse in an electrical system. Sure bolts shear off at the least convenient times...but I rather have them shear than break the bosses that they tread into on the bikes frame.

daryl

Good thinking !!! That's something I try and work into the pannier frames I make..

I've built weaknesses into the frames to save the aluminium frame bosses if they take a whack in a crash or fall.

Of course I get people saying "Jeez, you need thick box section this and that" but id rather replace an M6 bolt than my subframe
__________________
Did some trips.
Rode some bikes.
Fix them for a living.
Can't say anymore.
Reply With Quote
  #11  
Old 6 May 2010
gixxer.rob's Avatar
Registered Users
Veteran HUBBer
  
Join Date: Mar 2008
Location: Back in Melb
Posts: 287
Quote:
Originally Posted by -ralph- View Post
Thanks for all the replies folks. There is no marking on the head as it's not a bolt. It's a threaded stud and a nut.

Somebody has since explained to me why they use studs not bolts though

That makes sense to me so I'm going to stick with the OEM studs and order some from a Yamaha dealer.

Thanks again everybody.
Looking at that picture again, it's pretty clear it's a stud and the non threaded section sits inline with the sprocket....

Sorry..
Reply With Quote
Reply

« Previous Thread | Next Thread »

Currently Active Users Viewing This Thread: 1 (0 Registered Users and/or Members and 1 guests)
 
Thread Tools
Display Modes
Linear Mode Linear Mode

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Oil filter bolts stripped -'87 dhinder Yamaha Tech 15 1 Oct 2012 17:56
re-torquing head bolts stari vujadin Yamaha Tech 3 11 May 2009 21:48
Head bolts skip Yamaha Tech 0 19 Jan 2004 08:28
Bolts skip Yamaha Tech 1 24 Dec 2003 07:47

 
 

Announcements

Thinking about traveling? Not sure about the whole thing? Watch the HU Achievable Dream Video Trailers and then get ALL the information you need to get inspired and learn how to travel anywhere in the world!

Have YOU ever wondered who has ridden around the world? We did too - and now here's the list of Circumnavigators!
Check it out now, and add your information if we didn't find you.

Next HU Eventscalendar

HU Event and other updates on the HUBB Forum "Traveller's Advisories" thread.
ALL Dates subject to change.

2024:

Add yourself to the Updates List for each event!

Questions about an event? Ask here

HUBBUK: info

See all event details

 
World's most listened to Adventure Motorbike Show!
Check the RAW segments; Grant, your HU host is on every month!
Episodes below to listen to while you, err, pretend to do something or other...

2020 Edition of Chris Scott's Adventure Motorcycling Handbook.

2020 Edition of Chris Scott's Adventure Motorcycling Handbook.

"Ultimate global guide for red-blooded bikers planning overseas exploration. Covers choice & preparation of best bike, shipping overseas, baggage design, riding techniques, travel health, visas, documentation, safety and useful addresses." Recommended. (Grant)



Ripcord Rescue Travel Insurance.

Ripcord Rescue Travel Insurance™ combines into a single integrated program the best evacuation and rescue with the premier travel insurance coverages designed for adventurers.

Led by special operations veterans, Stanford Medicine affiliated physicians, paramedics and other travel experts, Ripcord is perfect for adventure seekers, climbers, skiers, sports enthusiasts, hunters, international travelers, humanitarian efforts, expeditions and more.

Ripcord travel protection is now available for ALL nationalities, and travel is covered on motorcycles of all sizes!


 

What others say about HU...

"This site is the BIBLE for international bike travelers." Greg, Australia

"Thank you! The web site, The travels, The insight, The inspiration, Everything, just thanks." Colin, UK

"My friend and I are planning a trip from Singapore to England... We found (the HU) site invaluable as an aid to planning and have based a lot of our purchases (bikes, riding gear, etc.) on what we have learned from this site." Phil, Australia

"I for one always had an adventurous spirit, but you and Susan lit the fire for my trip and I'll be forever grateful for what you two do to inspire others to just do it." Brent, USA

"Your website is a mecca of valuable information and the (video) series is informative, entertaining, and inspiring!" Jennifer, Canada

"Your worldwide organisation and events are the Go To places to for all serious touring and aspiring touring bikers." Trevor, South Africa

"This is the answer to all my questions." Haydn, Australia

"Keep going the excellent work you are doing for Horizons Unlimited - I love it!" Thomas, Germany

Lots more comments here!



Five books by Graham Field!

Diaries of a compulsive traveller
by Graham Field
Book, eBook, Audiobook

"A compelling, honest, inspiring and entertaining writing style with a built-in feel-good factor" Get them NOW from the authors' website and Amazon.com, Amazon.ca, Amazon.co.uk.



Back Road Map Books and Backroad GPS Maps for all of Canada - a must have!

Your ad could be here, on EVERY page of the HUBB, or the whole website, or as many as you like!

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 R80G/S.

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 all over the world with the help of volunteers; 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, or ask questions on the HUBB. 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.



All times are GMT +1. The time now is 02:41.

Contact Us - Horizons Unlimited Motorcycle Travellers Website - Archive - Privacy Statement - Top