The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: Olliepup on November 24, 2010, 04:19:39 PM

Title: Driveline Lash
Post by: Olliepup on November 24, 2010, 04:19:39 PM

Typically, how much should I be able to rotate my rear wheel when off the ground and in first gear (engine not running)r? I would expect this to represent the total drive line lash from the engine to the rear wheel; splines, trans gears, u-joint, and rear drive.
Wavy

Title: Re: Driveline Lash
Post by: Billmc on February 13, 2018, 11:08:40 AM

I know this is 8 years old but was never answered and I am curious myself. Anybody have an answer?

Title: Re: Driveline Lash
Post by: Barry on February 13, 2018, 11:49:02 AM

I just measured mine at the tyre and it's 26mm.  This is a low mileage bike with negligible wear on the splines.

Title: Re: Driveline Lash
Post by: Runninn1 on February 13, 2018, 02:53:17 PM

About the same for me... 1" (25mm), I will check again tonight & report back.

Title: Re: Driveline Lash
Post by: Tony Smith on February 13, 2018, 04:34:31 PM

Over 50mm. but the drive splines are well past worn out and it is a wonder to me that it has not yet over-ridden them.

I know from relatively recent adventures fitting a new clutch and clutch carrier  that the gearbox is fine - nearly all the slop is in the original R65 final drive and I don't care about that as a R75 unit is going on very soon.

And yes, before anyone asks, I am fitting a new drive cup to whichever rear wheel I end up using - either the original R65 wheel or the LS wheel that the workshop in town still hope to salvage (they are on a "no fix no fee" arrangement as their first attempt to roll the LS wheel straight failed). The second attempt involves heating the rim to almost melt point to de-stress it and then rolling it again. Given the way aluminium behaves at near melt point, I wish them luck, OTHO, if it works I will have a serviceable LS wheel to match the K100 front wheel.

Title: Re: Driveline Lash
Post by: Runninn1 on February 14, 2018, 02:27:40 PM

22mm....actually surprised it wasn't more.