Here are some photos of another design of a pivot arm 2 safety bracket.
As some know, some bad welds have been discovered which allows the pivot arm to fail. When the Pivot Arm fails the whole suspension collapses. At high speeds, a pivot arm failure could be potentially disasterous.
The safety bracket prevents a suspension collapse. I am guessing that there would be some indication where you would know if and when the pivot arm fails under the safety bracket, however the safety bracket should hold up the suspension where one could ride out and not be left standed somewhere.
The washers on the nut side are not quite flush but the bracket is very secure.
As some know, some bad welds have been discovered which allows the pivot arm to fail. When the Pivot Arm fails the whole suspension collapses. At high speeds, a pivot arm failure could be potentially disasterous.
The safety bracket prevents a suspension collapse. I am guessing that there would be some indication where you would know if and when the pivot arm fails under the safety bracket, however the safety bracket should hold up the suspension where one could ride out and not be left standed somewhere.
The washers on the nut side are not quite flush but the bracket is very secure.
Attachments
maddogjeff
Expert
Nice job Hondo. For others who want to read about this problem, follow this thread
http://www.ty4stroke.com/viewtopic.php? ... highlight=
Check out page 3 to see Hondo's failed part.
http://www.ty4stroke.com/viewtopic.php? ... highlight=
Check out page 3 to see Hondo's failed part.
Thanks Jeff,
Thanks for the background information you provided.
Thanks for the background information you provided.
Glock30
Extreme
- Joined
- Apr 14, 2004
- Messages
- 83
Hondo/Others
I have the same machine as your but with much lower mileage (<2000 miles) I want to fix/replace/reinforce the pivot arm before it fails.
My idea is this:
1) Remove the pivot arm.
2) Sandblast to strip.
3) Tigweld over old welds to re-fuse any cracks or bad welds.
4) Tigweld gap areas where no weld was ever beaded from the factory.
5) Sandblast again to clean.
6) Powder coat pivot arm to seal from rust.
#4) should add about 40-50% more weld to the arm.
Do you think this will be enough to ensure my pivot arm will last?
Do you think I should just try to get the stronger replacement arm?
Do you think I should do the above and add your style bracket?
I have installed the stiffer 3000 nm springs set.
I am a Tool and Die guy by trade.
Thanks In Advance
I have the same machine as your but with much lower mileage (<2000 miles) I want to fix/replace/reinforce the pivot arm before it fails.
My idea is this:
1) Remove the pivot arm.
2) Sandblast to strip.
3) Tigweld over old welds to re-fuse any cracks or bad welds.
4) Tigweld gap areas where no weld was ever beaded from the factory.
5) Sandblast again to clean.
6) Powder coat pivot arm to seal from rust.
#4) should add about 40-50% more weld to the arm.
Do you think this will be enough to ensure my pivot arm will last?
Do you think I should just try to get the stronger replacement arm?
Do you think I should do the above and add your style bracket?
I have installed the stiffer 3000 nm springs set.
I am a Tool and Die guy by trade.
Thanks In Advance
Glock 30,
IMO I would have to say do the additional welding - powder coat finish, and also add some sort of additional safety bracket as well.
With your expertise, the additional welding would certainly strengthen and reinforce this area.
My dealer and his mechanic had considered and questioned the heavy spring which I also have. It may have contributed to the failure, however this area needs to be strengtened considerably.
If I had the time and had your technical expertise, I would do both.
Putting some sort of strap, or safety bracket on without question should provide a better comfort level as compared to; what if, this pivot arm2 fails at high speeds, with on coming traffic, in a sharp turn, or big bumps etc. (all hypothetical scenario's)
As I stated before even if the pivot arm did fail, and with an addition bracket, atleast you would be able to get back without being stranded.
You shouldn't have a problem, with the mods you have planned, along with a bracket.
Hope this helps...
IMO I would have to say do the additional welding - powder coat finish, and also add some sort of additional safety bracket as well.
With your expertise, the additional welding would certainly strengthen and reinforce this area.
My dealer and his mechanic had considered and questioned the heavy spring which I also have. It may have contributed to the failure, however this area needs to be strengtened considerably.
If I had the time and had your technical expertise, I would do both.
Putting some sort of strap, or safety bracket on without question should provide a better comfort level as compared to; what if, this pivot arm2 fails at high speeds, with on coming traffic, in a sharp turn, or big bumps etc. (all hypothetical scenario's)
As I stated before even if the pivot arm did fail, and with an addition bracket, atleast you would be able to get back without being stranded.
You shouldn't have a problem, with the mods you have planned, along with a bracket.
Hope this helps...
welding and painting is not enough you have to install a bracket under the shaft that hold the spring block or buy the 2006 rs venture bracket its been modified by yamaha i don t know why
maddogjeff
Expert
Glock30,
If you look closely at Hondo's pics of failed part, it looks to me that it's not the weld that failed but the metal itself ripped near the weld.
If you look closely at Hondo's pics of failed part, it looks to me that it's not the weld that failed but the metal itself ripped near the weld.
Jeff,
It did start with the welds. A close inspection shows they were rusted, and not a good quality weld. (Made by the lowest bidder! lol) When the welds gave way and failed there was no metal bonding so the stresses continued to tear the metal down.
Therefore, a good reason to install additional safety device in the form of a bracket.
Regarding the 06 Pivot Arm, according to my dealer the gussets on top of the pivot arm are reinforced. Why? I don't know. To me this is not the problem area.
I am perturbed with my dealer and Yamaha.
Instead of replacing the pivot arm with a reinforced 06 arm, Yamaha sent an 05 arm. Doesn't make any sense. Even if they had sent an 06 arm the safety bracket would go on anyway.
Another reason to put on a safety bracket.
Luckily when the failure occured, after bending the metal back up a bit and wrapping a strap around the pivot arm in order to hold up the suspension, I only had to limp the sled back 2 miles to the nearest pick-up point.
I can't imagine limping the sled 20 or 30 miles to the nearest pick-up point. It would have taken some time for sure.
Having the bracket on the sled will make me more comfortable, especially when riding in the boonies off trail in the Allagash.
It did start with the welds. A close inspection shows they were rusted, and not a good quality weld. (Made by the lowest bidder! lol) When the welds gave way and failed there was no metal bonding so the stresses continued to tear the metal down.
Therefore, a good reason to install additional safety device in the form of a bracket.
Regarding the 06 Pivot Arm, according to my dealer the gussets on top of the pivot arm are reinforced. Why? I don't know. To me this is not the problem area.
I am perturbed with my dealer and Yamaha.
Instead of replacing the pivot arm with a reinforced 06 arm, Yamaha sent an 05 arm. Doesn't make any sense. Even if they had sent an 06 arm the safety bracket would go on anyway.Another reason to put on a safety bracket.
Luckily when the failure occured, after bending the metal back up a bit and wrapping a strap around the pivot arm in order to hold up the suspension, I only had to limp the sled back 2 miles to the nearest pick-up point.
I can't imagine limping the sled 20 or 30 miles to the nearest pick-up point. It would have taken some time for sure.
Having the bracket on the sled will make me more comfortable, especially when riding in the boonies off trail in the Allagash.
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