K100 handlebar replacement

[TNastsyDwnTwn]

I am changing my k bike into a scrambler and I have ran into a problem with the handlebar. For some reason the throttle trust won't slide onto it. I bought a 7/8 bar. Any suggestions will be appreciated.

[Laitch]

I am changing my k bike into a scrambler and I have ran into a problem with the handlebar. For some reason the throttle trust won't slide onto it. I bought a 7/8 bar. Any suggestions will be appreciated.

Despite what advertisements may seem to imply, ⅞" is greater than 22 millimeters—the dimension of BMW K-bike handlebars. Many people just sand down the ⅞ handlebar until the BMW controls will slide onto it. Your challenge is not uncommon. What you mean by throttle trust I'll figure out after I get some sleep.

[TNastsyDwnTwn]

I meant throttle twist. Sorry. I guess that's what I will have to do tomorrow. Thank you.

[Laitch]

I meant throttle twist.

Thanks. I'll stay awake a little longer then.

[TNastsyDwnTwn]

ok thank you. What is the procedure to lubricate the the twist handle so it will return to its previous position.

[Laitch]

ok thank you. What is the procedure to lubricate the the twist handle so it will return to its previous position.

You'll find instructions on the procedure in a pdf in this post right here. I'll add that you must be certain that the flange on the throttle grip isn't making contact with the throttle/master cylinder assembly because friction from that will slow the return, too.

You'll find instructions on this and other procedures in the Technical Library Card Catalog (Index).

[TNastsyDwnTwn]

Thank you so much. I appreciate it. :2thumbup:

[Martin]

Resist the temptation to hammer it  :nono   on, sand it down until it slides on.

[TNastsyDwnTwn]

I came very close but I resisted the urge! So what exactly would be best to sand the bars down with?

[Laitch]

So what exactly would be best to sand the bars down with?

You're going need an experienced handlebar sander for that answer. I'm just an observer.

[Martin]

Emery strip on a roll, keep rotating it so you get it even, you could also use a file. Wrap a few of layers of tape to mark the length you require, this should stop you from marring the rest.
Regards Martin.

[TNastsyDwnTwn]

Ok just making sure by hand would be the suggested way.

[Shiny]

So TNasty, you asked in my thread what I ended up doing:

I attacked the problem from both directions, I sanded the paint off the grip portions of my new 7/8" bars and I filed the internal diameter of the bmw controls. It doesn't take much, but it is extremely tedious. Took probably an hour and two beers. Use a rat tail file, about 3/8" round.

[TNastsyDwnTwn]

Ok thank you. I used a dremel tool on mine. Thank you.