A MOUNTAIN RAT BMX

[twojs.bike]

Maybe I am confused. To loosen the BB turn the drive side clockwise and the non drive side anti-clockwise. Sounds like that is what you did? That should be normal no? And I think those bearings in the picture are correct. I think your bike was assembled correctly. Other than the lack of grease.

Either way, just keep pressing forward. We all learn by experience.

 

[GeePig]

Maybe I am confused. To loosen the BB turn the drive side clockwise and the non drive side anti-clockwise. Sounds like that is what you did? That should be normal no? And I think those bearings in the picture are correct. I think your bike was assembled correctly. Other than the lack of grease.

Either way, just keep pressing forward. We all learn by experience.

I remember being slightly surprised by this as well, because most of my bikes have the crank and lever welded on...

 

[LukeTheJoker]

The other side of your bottom bracket needs that lock ring removed first before removing the center.

The crank bearings as you show them are in the correct orientation.

 

[Shrunken_Head_Pedaler]

Maybe I am confused. To loosen the BB turn the drive side clockwise and the non drive side anti-clockwise. Sounds like that is what you did? That should be normal no? And I think those bearings in the picture are correct. I think your bike was assembled correctly. Other than the lack of grease.

Either way, just keep pressing forward. We all learn by experience.

I may have not posted pics properly of the issue. The bearings should have opposed faces. When I removed the spindle, I noticed that the bearing were facing the same direction. It reminded me, that I noticed the left crank arm appeared to not be seated properly when I found the bike. Some photos below. There is apparent wear from the ball bearing retainer rubbing on the spindle. This first pic is how I found the BB. The second pic is the way I think the bearings should face. Note that I only flipped the bearing on the stationary cup side. Being that I removed the stationary cup on the drive side, and it needed to turn clockwise to remove, this frame has me boggled. I’ll get it worked out.

 

[LukeTheJoker]

Yes, your second picture is correct.

Someone must have been having an off day when they assembled it originally!

 

[GeePig]

Well, hopefully it is now going to pedal like butter!

 

[Shrunken_Head_Pedaler]

Yes, your second picture is correct.

Someone must have been having an off day when they assembled it originally!

Whew! I knew things were screwed up! I reassembled the unit in the frame and it looks correct now.

 

[Shrunken_Head_Pedaler]

Well, hopefully it is now going to pedal like butter!

I hope so too.

 

[Shrunken_Head_Pedaler]

Well, hopefully it is now going to pedal like butter!

Just noticed that if I upgrade to a new crankset, I will need a new bb. All new cranks bolt to the spindle and the crankset for this bike locks on with a nut to the threaded spindle.

 

[GeePig]

Just noticed that if I upgrade to a new crankset, I will need a new bb. All new cranks bolt to the spindle and the crankset for this bike locks on with a nut to the threaded spindle.

But you at least have something there to keep the bike whole as you work on other parts.

 

[Shrunken_Head_Pedaler]

But you at least have something there to keep the bike whole as you work on other parts.

I appreciate your optimism! I’m going to work on the bent teeth on the crank sprocket, just in case I need to put it back on.

 

[Shrunken_Head_Pedaler]

Feeling better about the rear of this bike. I feel that I got everything aligned. I will get a better feel when the wheel set comes. Removed the rest of the bottom bracket and ordered a new one.

 

[OddJob]

Maybe I am confused. To loosen the BB turn the drive side clockwise and the non drive side anti-clockwise. Sounds like that is what you did? That should be normal no? And I think those bearings in the picture are correct. I think your bike was assembled correctly. Other than the lack of grease.

Either way, just keep pressing forward. We all learn by

As @LukeTheJoker said, that second photo of the BB spindle and bearings is correct. The cups and lock nuts / rings always are threaded in the direction of the pedal action; so 'right is tight' on the drive side, and 'left is correct' on the non-drive side. Same with the pedal mounts on the cranks. Otherwise with the pedaling action and leverage, the pedals and cranks would loosen up.

For the bearings, we have a saying, "Balls out" for the bottom bracket, and "balls in" for the headset bearings.

It's just fun to say 'balls'.

 

[MattiThundrrr]

For the bearings, we have a saying, "Balls out" for the bottom bracket, and "balls in" for the headset bearings.

It's just fun to say 'balls'.

BALLS!

 

[OddJob]

BALLS!

Matti, that was a exclamation that my Uncle Ellwood uttered as kind of a spoken frustration; his version of a 4-letter word, with one extra letter. Actual 4 letter words were verboten in my grandma's puritanical household. Unless they were uttered by my grandpa, usually in Swedish or Norwegian.

 

[twojs.bike]

With all do respect I think you have that backwards. (Or maybe we are saying the same thing and I am just confused)

 

[Shrunken_Head_Pedaler]

Quick disassembly video of the Mongoose Excursion bottom bracket.

 

[twojs.bike]

Looks correct to me.

 

[Shrunken_Head_Pedaler]

My set of rims came a lot earlier than I expected. Other parts will trickle in throughout the week. They look awesome and roll perfect! Excited to get a good mock up soon.

 

[LukeTheJoker]

Cool wheels!