Name this part! 06 Mastiff

[Jay Dawg]

Obviously I’ve got a chewed up part on my 2006 mastiff, I have a service manual for this bike and the the chassis diagram does not identify this part, it is on the right side between the frame and swing-arm. Its closest to #4 on the diagram. I’m trying to determine what the purpose of this part is. Does this have internal threads? I’m hoping somebody out there has a picture, part #, or information that sheds light, because the service manual is of no help on this one.

 

[Mastiff Rider64]

Ok think I can somewhat answer this. What this part does is. It screws out against you pivot shaft bushing. Keeping your swing arm straight when you tighten your pivot shaft bolt down. I recently had issues with mine not being tighten down against my pivot shaft bushing correctly, and my bike was riding like a hardtail because the swing arm wasn't moving correctly because of it. What it's called I'm not sure, but I've been calling it pivot shaft bolt cover. Because the only thing inside of it is your pivot bolt.

But it is pat of the frame to my knowledge and cannot be replaced anymore.

 

[SCC007]

Agree, looks like part of the frame and can't be replaced. No idea why that would be so scuffed up unless someone used an adjustable wrench or pipe wrench or something. Hopefully it is not an indication that there is an issue with your swing arm (pivot axle or bearings).

 

[Jay Dawg]

Ok think I can somewhat answer this. What this part does is. It screws out against you pivot shaft bushing. Keeping your swing arm straight when you tighten your pivot shaft bolt down. I recently had issues with mine not being tighten down against my pivot shaft bushing correctly, and my bike was riding like a hardtail because the swing arm wasn't moving correctly because of it. What it's called I'm not sure, but I've been calling it pivot shaft bolt cover. Because the only thing inside of it is your pivot bolt.

But it is pat of the frame to my knowledge and cannot be replaced anymore.

That’s exactly what’s happening with my bike right now it feels like I’m riding a hard tail. I can lift the bike and the rear suspension doesn’t move even a quarter inch. I’m trying to get as much information about this before I pull the tire and the swing-arm. Thanks.

 

[Jay Dawg]

Agree, looks like part of the frame and can't be replaced. No idea why that would be so scuffed up unless someone used an adjustable wrench or pipe wrench or something. Hopefully it is not an indication that there is an issue with your swing arm (pivot axle or bearings).

I’ve already got new pivot axle and bearings just in case I have to replace them when I get in there It just seems strange to me that if this is such a critical item to the swing-arm that it would not be mentioned or highlighted in the service manual.

 

[Mikeinjersey]

Obviously I’ve got a chewed up part on my 2006 mastiff, I have a service manual for this bike and the the chassis diagram does not identify this part, it is on the right side between the frame and swing-arm. Its closest to #4 on the diagram. I’m trying to determine what the purpose of this part is. Does this have internal threads? I’m hoping somebody out there has a picture, part #, or information that sheds light, because the service manual is of no help on this one.

Check out page 2-2 exploded view. https://www.dropbox.com/s/oyyecr6gvpahwp6/BDM 07 Chapter 2 Chassis.pdf?dl=0
It may be sheared inside and causing a misalignment which may be causing the suspension to bind.

 

[Jay Dawg]

Check out page 2-2 exploded view. https://www.dropbox.com/s/oyyecr6gvpahwp6/BDM 07 Chapter 2 Chassis.pdf?dl=0
It may be sheared inside and causing a misalignment which may be causing the suspension to bind.

I went to the link and that is basically the same diagram that I posted with my chewed up part, the listing you provided was for an 07, the one that I posted was for an 06 but they show exactly the same thing and it does not show an internal breakdown of that particular piece, it does show the breakdown on the left side which is not where my issue is. But thanks you for the effort.

 

[HMAN]

I went to the link and that is basically the same diagram that I posted with my chewed up part, the listing you provided was for an 07, the one that I posted was for an 06 but they show exactly the same thing and it does not show an internal breakdown of that particular piece, it does show the breakdown on the left side which is not where my issue is. But thanks you for the effort.

Consider this....you bought a used bike that someone else may have fkd up? Is it possible the ass end has been apart and put back together incorrectly? That would help explain the teeth marks on your mystery part. It may be part number 6 on the view you posted? Just misplaced...

 

[Mikeinjersey]

I went to the link and that is basically the same diagram that I posted with my chewed up part, the listing you provided was for an 07, the one that I posted was for an 06 but they show exactly the same thing and it does not show an internal breakdown of that particular piece, it does show the breakdown on the left side which is not where my issue is. But thanks you for the effort.

In the photo's you posted you can see flat areas like part # 6 has.
Try to private message Marky- Marc he is a member and I'm sure he will be able to help you.

 

[Mastiff Rider64]

If you still need help private message me and I'll give you my number and walk you thru what I did to fix the issue with riding like a hardtail.

 

[Jay Dawg]

Consider this....you bought a used bike that someone else may have fkd up? Is it possible the ass end has been apart and put back together incorrectly? That would help explain the teeth marks on your mystery part. It may be part number 6 on the view you posted? Just misplaced...

Oh yeah, there’s no doubt this has been apart, and fucked up. #6 is in the correct orientation but could be wrong part or clearance of tolerance.

 

[Jay Dawg]

If you still need help private message me and I'll give you my number and walk you thru what I did to fix the issue with riding like a hardtail.

Ok thanks, I’m taking measurements now before tearing down to know which direction the tire wheel assembly needs to go. I may take you up on your offer. Thanks.

 

[Jay Dawg]

In the photo's you posted you can see flat areas like part # 6 has.
Try to private message Marky- Marc he is a member and I'm sure he will be able to help you.

Sounds like Marky Marc is a knowledgeable resource, i’ve seen a few of his YouTube videos. Thanks.

 

[Jay Dawg]

It looks like the rear tires’ positioning is very close to what it should be but I still think it’s about a quarter inch further to the right then what it should be. The Drive belt appears to be slightly riding off of the right edge of the drive pulley and into the pulley cover, so it could just be a matter of incorrect placement of wheel spacers. I wish the maintenance manual put the specifications for the spacers into their books, that way I could measure the spacers to see if they were in the proper position. I appreciate everyone’s comments and suggestions, I’ll post my findings as I go.

 

[Mikeinjersey]

Oh yeah, there’s no doubt this has been apart, and fucked up. #6 is in the correct orientation but could be wrong part or clearance of tolerance.

Check out this link Jay I think it will interest you !!

Rear wheel misalignment

Well as some of you know i have had a problem with my rear wheel being misaligned. Its been rubbing the inside of the pulley side right at the rear taillight. Well after getting Eric to send spacers, and vleaning every part as i go. I was trying to reassemble the bike today. Well i was screwing...

www.bigdogbiker.com

 

[Jay Dawg]

Check out this link Jay I think it will interest you !!

Rear wheel misalignment

Well as some of you know i have had a problem with my rear wheel being misaligned. Its been rubbing the inside of the pulley side right at the rear taillight. Well after getting Eric to send spacers, and vleaning every part as i go. I was trying to reassemble the bike today. Well i was screwing...

www.bigdogbiker.com

Definitely some of the same issues I’m dealing with. I will ask some questions and post some more pics there, THANKS!

 

[Marky-Marc]

Call up Eric at HDM (@Th3InfamousI), this is what you're looking for..or buy it off HDM on ebay.....that one is CHEWED to HELL.....the name is in the listing for the part, it's the pivot axle arm assembly cap...call Derek, Donna or Eric, they MAY just have some replacement CAPS laying around without the shaft...however, if it was me...i'd get the whole new one......

Big Dog Motorcycles Frame Pivot Axle Shaft Assembly 2006-11 K9, Mastiff, Bulldog | eBay

Mastiff: 2007-11. This is a new swingarm pivot axle for 300 tire Big Dog Motorcycles. The shaft includes a new cap and will fit the following years & models We are the only genuine OEM manufacturer of Big Dog Motorcycles bikes and Big Dog Motorcycles parts.

www.ebay.com

Cheers!

 

[Marky-Marc]

Here's another one....this one is cheaper, call them up and ask Eric the difference BEFORE you just buy either one....

Their phone and contact info is usually floating on a banner on top of this forum.....

BIG DOG MOTORCYCLES FRAME PIVOT SHAFT ASSEMBLY 2007-2011 K-9 MASTIFF BULLDOG | eBay

Find many great new & used options and get the best deals for BIG DOG MOTORCYCLES FRAME PIVOT SHAFT ASSEMBLY 2007-2011 K-9 MASTIFF BULLDOG at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Cheers....

 

[Jay Dawg]

Call up Eric at HDM (@Th3InfamousI), this is what you're looking for..or buy it off HDM on ebay.....that one is CHEWED to HELL.....the name is in the listing for the part, it's the pivot axle arm assembly cap...call Derek, Donna or Eric, they MAY just have some replacement CAPS laying around without the shaft...however, if it was me...i'd get the whole new one......

Big Dog Motorcycles Frame Pivot Axle Shaft Assembly 2006-11 K9, Mastiff, Bulldog | eBay

Mastiff: 2007-11. This is a new swingarm pivot axle for 300 tire Big Dog Motorcycles. The shaft includes a new cap and will fit the following years & models We are the only genuine OEM manufacturer of Big Dog Motorcycles bikes and Big Dog Motorcycles parts.

www.ebay.com

Cheers!

Thank you, I already purchased the swing arm axle and bearings, just in case. I will follow up with Eric about that chewed up cap. I’m getting quite the introduction to everything BIG DOG. I’ve enjoyed watching many of your videos, big thumbs up, those helped me many times!!!

 

[Jay Dawg]

Here's another one....this one is cheaper, call them up and ask Eric the difference BEFORE you just buy either one....

Their phone and contact info is usually floating on a banner on top of this forum.....

BIG DOG MOTORCYCLES FRAME PIVOT SHAFT ASSEMBLY 2007-2011 K-9 MASTIFF BULLDOG | eBay

Find many great new & used options and get the best deals for BIG DOG MOTORCYCLES FRAME PIVOT SHAFT ASSEMBLY 2007-2011 K-9 MASTIFF BULLDOG at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Cheers....

Thanks again Marky-Marc!