The Yamaha Road Star Warrior Forum

Yeah, it seems to only work with just standard bolts.  If it's special in any way, then the "system" doesn't work.  But, even now, I just browsed a few fiche pages and this system doesn't seem to work in all cases (but most appeared to be accurate).  So, I apologize for the mis-information...

 

 

Vietz2:

Not completely positive about this...but I'm pretty sure, with Yamaha part numbers, for bolt sizes you can just look at the 2nd set of numbers of the part #.  So, the part in question is:

BOLT,SMALL FLANGE 
95027-08016-00

08016 = 8mm X 16mm

EDITED: The website I got this from: http://viragotechforum.com/phpBB/viewtopic.php?t=2670

Vietz2 you're the man  ... you should get an award for this contribution   .. unfortunately it doesn't identify the thread pitch but nonetheless, it's a great tool for all of us....Thanks

NorCalWarrior ... that's some good basic info you posted for those challenged by screws/bolt specs ... might i add that the fastener length is always measured under the head except for flat head screws and shoulder bolts. Many of the Yamaha button head fasteners are proprietary so DIN standards and the Machinery Handbook is useless   ... Check out the hyperlinks to Fastener Fable 1 & 2 if interested.

Vietz2 ... here's an example confirming your response as well as my comment of not identifying special thread pitch. This is the proprietary button hd screw that holds the peg support bracket to the frame:

Taken from an earlier post: http://rswarrior.com/forums/p/105574/884967.aspx#884967

AlanH:

jimmy2:

I dont know what they are made of but dull good drill bits very quickly. Whoever designed those large bolts with such a small allen size needs to be fired.  

Taken from an old topic: Fastener Fable-1 & Fastener Fable-2

This specific Yamaha button hd scr uses a std 6mm hex key 

M10-1.25p x 50mm Long Yamaha Button Head Steel. This will be very tough to get @ 50mm unless you order from dealer (2 of 92014-10050-00 - BOLT, BUTTON HEAD @ $1.90ea.)

I would suggest using anti-seize on these bolts and torque to factory spec of 35 ft~lbs max. The location of these bolts make them vunerable to corrosion & road trash because they are th'd through the frame and exposed on the inside. I always clean the thd's before reassembly.... Just my .02

AlanH - you're a friggin' GOD on this site.  WOW!  I'm speechless...thanks man. 

I did a little further investigation on this and found this on a Virago website:

And now, a real secret: the system for hardware. The first set of digits identifies what kind of hardware: 98501 = panhead screw 91311 = allen head screw 92990 = lockwasher etc. The next set of digits give the dimensions - 05010 is 5mm diameter, 10mm in length. For example, want to replace the crankcase cover screws with stainless steel screws? You need 3 6x20mm (91311-06020), 9 6x25 (91311-06025), 8 6x30 (91311-06030) and 4 6x40mm (91311-06040). And don't forget to use antiseize. With these codes, you can replace fasteners not covered in the usual kits of chrome/stainless fasteners. Don't forget that some fasteners are high tensile strength, so you shouldn't substitute a weaker fastener that's the same dimensionally.   The website I got this from: http://viragotechforum.com/phpBB/viewtopic.php?t=2670

Ok...on the foot assembly bolt I concede..its a 50mm length, but on the tach housing bolt it doesnt make sense.

When i needed a longer bolt for the tach housing both sites showed:
SCREW 
90149-06105-00

When I measured the stock bolt it was 6mm x 18mm with 1.25pitch. 

I think we were all doing the same thing at the same time!  I checked too.  The oem button head bolts in the tach head are M6x20 and 1.25  1.00 (corrected by ArizonaWarrior) and their Part# is 90149-06302-00 (2002-2005) or 90149-06105-00 (2006-2008).  The "06" part works.  Like you said, I bet this system works a lot with the basic bolts though.  I'm going to pay more attention!!

Vietz2:

Not completely positive about this...but I'm pretty sure, with Yamaha part numbers, for bolt sizes you can just look at the 2nd set of numbers of the part #.  So, the part in question is:

BOLT,SMALL FLANGE 
95027-08016-00

08016 = 8mm X 16mm

RobRiguez:

.... almost every bolt ive come across on the Warrior is 1.25 thread pitch.

.... i got to challenge you on that statement. IMO, the most popular fastener size on the Warrior is M6 thd x 1.0p and is used just about everywhere. Many of them are proprietary.

Std Thd & Pitch

M5	0.8
M6	1.0
M8	1.25
M10	1.5
M12	1.75

If the screw is not used for a high strength application, as discussed in my Fable 1 & 2,  i would suggest using a std Stainless A-2 fastener (even available at Home Depot) which is a lot less money than a chrome equivalent and it won't corrode in the hex socket as will the chrome. I chuck up my SS screws in an electric drill and polish them in a heart beat to look better than chrome!

RobRiguez:

To measure a metric bolt all you need is a metric ruler with mm marks.

The size of the bolt is its diameter. Simply measure the thickness of the bolt with the ruler. The length is again measured with the same ruler from the bottom of the bolt head (The flat part that will butte up against whatever is being fastened) to the tip of the bolt. The pitch is how far away the threads are from each other. You measure tip to tip again with he same ruler.

I just saw your post, Rob. Fantastic explanation. From now on, I'm allowed to ask only about the bolt length!
I will use an electronic caliper to measure accurately the pitch, now I know how to do it properly.

Thank you also Alan for completing Rob's explanation... I will get the stainless part instead.

I don't know what I would without you guys. Thank you for taking the time to post all this great info...

Arizona Warrior:

The oem button head bolts in the tach head are M6x20 and 1.25 and their Part# is 90149-06302-00.  The "06" part works.  Like you said, I bet this system works a lot with the basic bolts though.  I'm going to pay more attention!!

  A&W .... i'm very disappointed in you 

The Tach screws are standard DIN thd & pitch: M6 x 1.0 p with a proprietary button head ... you have a short memory

M6 x 1.25p doesn't exist on planet earth. 

As the metric thread pitch number increases the thread becomes coarser. Opposite to American std's.

 

 Ok...that's cool then! Glad you found cheapo and secure shipping for the stuff.

Vietz2:

I did a little further investigation on this and found this on a Virago website:

And now, a real secret: the system for hardware. The first set of digits identifies what kind of hardware: 98501 = panhead screw 91311 = allen head screw 92990 = lockwasher etc. The website I got this from: http://viragotechforum.com/phpBB/viewtopic.php?t=2670

John... thank you for the compliment 

I suspected the preceding group of numbers identified the category of the fasteners as well. Thanks for the link though. Other than the engine, i probably can identify every fastener diameter and pitch by memory. Haven't a clue regarding the lengths

Here's something i posted early on: http://rswarrior.com/forums/p/28057/406492.aspx#406492

AlanH:

MrWilson...thanks for the compliment. Here's another fastener fable []

---

Standard Socket Button Head screws are 2 wrench sizes smaller than Socket Head screws of equal thread diameter.

---

The Yamaha Oversized Socket Button Head screws have the same wrench size as Socket Heads!

---

Stainless soc button head screws cannot sustain equal torque as there soc head counterparts. [] I found this out when i was torquing the smaller button head fasteners that came with the billet final drive cover. [!] Started to strip the hex before achieving torque value so i used stainless soc heads. []

---

I WOULD NOT USE STAINLESS BUTTON HEAD SCREWS FOR ANY HIGH STRENGTH/HIGH TORQUE APPLICATIONS, SUCH AS PEG MOUNTING BRACKETS TO FRAME, ETC.

AlanH:

The Tach screws are standard DIN thd & pitch: M6 x 1.0 p

While I would never challenge your knowledge, I will have to go back and measure again. I could swear they were 6mm x 18mm x 1.25.

AlanH:

with a proprietary button head  ... you have a short memory

AHA! Thats why i needed the washer!

AlanH:

As the metric thread pitch number increases the thread becomes coarser. Opposite to American std's.

For those that dont know, the reason for this is that std is measured in the number of threads per inch. So a higher number would mean MORE threads per inch and thus a finer thread. For metric, the gap between the threads is measured. So a higher number means a bigger gap/coarser thread. Just FYI for those that might have wondered why (as I did only a few weeks ago)

AlanH:

Stainless soc button head screws cannot sustain equal torque as there soc head counterparts. I found this out when i was torquing the smaller button head fasteners that came with the billet final drive cover. Started to strip the hex before achieving torque value so i used stainless soc heads.

OK, this doesnt make sense. The first sentence you state that the Stainless are weaker than standard bolts. Then in the last sentence you said because of this you chose to use the Stainless. ???? I confused.

RobRiguez:

While I would never challenge your knowledge, I will have to go back and measure again. I could swear they were 6mm x 18mm x 1.25.

• M6 x 1.25p doesn't exist on planet earth

AlanH:

As the metric thread pitch number increases the thread becomes coarser. Opposite to American std's.

For those that dont know, the reason for this is that std is measured in the number of threads per inch. So a higher number would mean MORE threads per inch and thus a finer thread. For metric, the gap between the threads is measured. So a higher number means a bigger gap/coarser thread. Just FYI for those that might have wondered why (as I did only a few weeks ago)

• I didn't realize i needed a translator. I guess we speak a different language  The standard and bench mark here is All METRIC! If you want to discuss threads per inch go to the HD Forum
• 1.25p is coarser than 1.0p

OK, this doesnt make sense. The first sentence you state that the Stainless are weaker than standard bolts. Then in the last sentence you said because of this you chose to use the Stainless. ???? I confused.

• You're confused and you're confusing me... the comparison is SOCKET BUTTON HEAD to SOCKET CAP which is a std soc allen screw. If you read my Fable 1 it explains the differences in the Allen-Key Sizes for the same thd body size with different heads!
• My understanding is that Tech is wanting to hold down some leather or vinyl Fender BIB if i'm not mistaken. Why waste the money on a chrome fastener that needs to be imported and will probably end up corroding in the hex soc to boot
• Now if you were talking about replacing the lower pinch bolts for the triple tree (M8 x 1.25p) using my original laser sig brackets i would say bring on the ferrous metal chrome screws as shown here and check out the corrosion too  ... http://flickr.com/photos/15071518@N07/sets/72157604222397890/show/

AlanH:

My understanding is that Tech is wanting to hold down some leather or vinyl Fender BIB if i'm not mistaken.

You are correct, as usual.

AlanH:

M6 x 1.25p doesn't exist on planet earth

I wasnt challenging you. Maybe I worded it incorrectly. I was stating that I must have measured wrong and wanted to check again for myself.

AlanH:

As the metric thread pitch number increases the thread becomes coarser. Opposite to American std's.

For those that dont know, the reason for this is that std is measured in the number of threads per inch. So a higher number would mean MORE threads per inch and thus a finer thread. For metric, the gap between the threads is measured. So a higher number means a bigger gap/coarser thread. Just FYI for those that might have wondered why (as I did only a few weeks ago)

• I didn't realize i needed a translator. I guess we speak a different language  The standard and bench mark here is All METRIC! If you want to discuss threads per inch go to the HD Forum
  • 1.25p is coarser than 1.0p

Again, I wasnt challenging you. I just learned how to measure thread pitch a week or so ago by digging around for more than an hour on the net before it finally sunk in. For others that may also not know, I wanted to explain what you said a bit further. I know it would have helped me understand it so I was trying to help others.

OK, this doesnt make sense. The first sentence you state that the Stainless are weaker than standard bolts. Then in the last sentence you said because of this you chose to use the Stainless. ???? I confused.

• You're confused and you're confusing me... the comparison is SOCKET BUTTON HEAD to SOCKET CAP which is a std soc allen screw. If you read my Fable 1 it explains the differences in the Allen-Key Sizes for the same thd body size with different heads!
• My understanding is that Tech is wanting to hold down some leather or vinyl Fender BIB if i'm not mistaken. Why waste the money on a chrome fastener that needs to be imported and will probably end up corroding in the hex soc to boot
• Now if you were talking about replacing the lower pinch bolts for the triple tree (M8 x 1.25p) using my original laser sig brackets i would say bring on the ferrous metal chrome screws as shown here and check out the corrosion too ... http://flickr.com/photos/15071518@N07/sets/72157604222397890/show/

Thank you for explaining. I didnt catch the part that you were talking about different types of heads. Sometimes I'm a little slow on the uptake.

RobRiguez .... No Problema ....this is the technical discussion forum and you certainly have the right to challenge me and anyone else ... I respect and applaud your contributions here and was just being sarcastic

As you stated previously, all that is req'd is a Metric Scale to measure the fastener diameter.

IMO, the thread pitch can easily be identified if you catalog the 5-popular sizes as a bench mark for comparison. Regarless of diameter, the thd pitch of any size fastener will work for another!

M5	0.8
M6	1.0
M8	1.25
M10	1.5
M12	1.75

An M10 x 1.25p fine pitch screw can easily be identified using the M8 x 1.25p screw 

McMaster-Carr is also a great source for identifying specific dimensions in lieu of the Machinist Handbook mentioned by another member