Unchain my bike... or so I thought...

On Thu, 14 Feb 2008 10:16:55 +0100, Larry xlax Lovisone
<netters2.DeleteThis@combogusinfocast.net> wrote:

>
> "Steve Mackay" <steve_mackay.DeleteThis@hotmail.com> wrote in message
> news:47b372c7$0$6516$4c368faf@roadrunner.com...
>
>> But... Can you run an idler, or tensioner like Buell does with the XBs
>> and
>> 1125Rs?
>>
>>
>> And, believe it or not, the Richie Morris Moto-ST team will be running
>> a belt
>> on the 1125R, at least for the inaugural Daytona race.
>
> I already thought about belt tensioner... but the BMW belt is not
> recommended to
> bend backwards like the
> Buell belt is...

Run the tensioner from underneath instead of top?
With only 3mm it could/should be possible?

J.

besides I don't think I have the room on Mr.RC45 dense
> packaging...
>
> Larry L
> 94 RC45 #2
> Have a wheelie NICE day...
> Lean & Mean it in every corner of your life...
> If it wasn't for us the fast lane would rust...
> V4'S are music to the seat of my pants...
> 1952 De Havilland Chipmunk...
> Yank and bank your brains loose...
> http://members.ebay.com/aboutme/-xlax-/
> http://home.comcast.net/~netters2/
> http://www.fox302.com/index.pl?s=vg&user=netters2
> http://www.flickr.com/photos/55532474@N00/?saved=1
> http://www.flickr.com/photos/10503451@N07/
>
>
>



--
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

On Wed, 13 Feb 2008 21:15:38 +0100, Larry xlax Lovisone
<netters2.TakeThisOut@combogusinfocast.net> wrote:

> Unchain my bike... or so I thought...
>
> Hans Renold is credited with inventing roller chain in 1880... but
> here we are 127 years later and bikes are still laboring under a
> steely... heavy... clanky... messy... chain... Mercy me chains are a
> pain... belts spell relief... and so my belt drive conversion starts
> with an engineering drawing...
>
> http://www.vfrdiscussion.com/forum/uploads/1202843870/gallery_3131_51_26197.jpg
>
> Gates Poly Chain comes in 3 belt sizes... 14mm pitch is what HD
> employs on their cruisers... 8mm is what I used on the VF500
> Belt-0-Ceptor... 11mm is the little known in between belt but only
> comes in lengths of 155T and 172T... I need 166T to make it work on
> Mr.RC45...
>
> http://www.vfrdiscussion.com/forum/uploads/1202676768/gallery_3131_51_3294.jpg
>
> I started with a Buell 11mm pitch sprockets and belt... a 30T up
> front and 70T out back... they were machined them to fit Mr.RC45...
> so far so good
>
> Buell's steel 30T 11mm spocket installed on the RC45 primary shaft...
>
> http://www.vfrdiscussion.com/forum/uploads/1202843870/gallery_3131_51_45790.jpg
>
> Buell's aluminum 72T 11mm sprocket installed on the RC45 axle...
>
> http://www.vfrdiscussion.com/forum/uploads/1202843870/gallery_3131_51_18651.jpg
>
> Ideally I needed 628mm between centers as evident with Mr.RC45's 17T
> 43T 110 links of chain prove to show...
>
> http://www.vfrdiscussion.com/forum/uploads/1202676768/gallery_3131_51_100085.jpg
>
> But when I added the Buell 30T 72T 155T setup it measured 561mm
> between centers... 67mm too short...
>
> http://www.vfrdiscussion.com/forum/uploads/1202676768/gallery_3131_51_84588.jpg
>
> Next I ordered a 172 tooth belt from BMW but with the Buell sprockets
> the BMW belt was 664mm between centers... 36mm too long...
>
> http://www.vfrdiscussion.com/forum/uploads/1202676768/gallery_3131_51_60739.jpg
>
>
> Maybe if I machine my own 76T sprocket so I started with a 20lb block
> of 7075 T6 Aluminum...
>
> http://www.vfrdiscussion.com/forum/uploads/1202676768/gallery_3131_51_62149.jpg
>
>
> After the teeth were cut by RCD Engineering the block was down to 10
> lbs at this stage...
>
> http://www.vfrdiscussion.com/forum/uploads/1202843870/gallery_3131_51_496.jpg
>
> After milling the spokes using only hand eye coordination it was down
> to 1 lb 13 oz...
>
> http://www.vfrdiscussion.com/forum/uploads/1202843870/gallery_3131_51_52808.jpg
>
> Now with the Buell 30T sprocket 172T BMW belt and 76T home made
> sprocket the distance between centers was 651mm... 23mm too long...
> because of the single sided swing arm I limited to 20mm adjustment so
> I knew it would be close... how close??? less than 3mm or .118
> thousands of an inch separates success from failure...
>
> http://www.vfrdiscussion.com/forum/uploads/1202676768/gallery_3131_51_80322.jpg
>
> I have failed to unchain Mr.RC45... not that I didn't come close... I
> came within 3mm of enjoying a light weight... maintenance free...
> snatch free... lubeless belt drive system... it all came down to
> finding the right number of teeth in a 11mm pitch belt... and so with
> only 2 bikes in the world that employ the 11mm pitch belt (2003 Buell
> and the 2007 BMW 800) I have to wait for a 3rd bike to employ the
> little known 11mm pitch Poly Chain Belt...
>
> So in conclusion after $1000 dollars in parts and a custom 7075 T6
> aluminum sprocket consuming over 30 days worth of machining... I have
> NO joy to report... in fact I'm devastated and sad... not to mention
> Gates Rubber wants $65K for the mold of a custom 166T 11mm pitch
> belt...

How about moving your swingarm 3mm aft with the help of an excenter
bushing?

J.

>
> Larry L
> 94 RC45 #2
> Have a wheelie NICE day...
> Lean & Mean it in every corner of your life...
> If it wasn't for us the fast lane would rust...
> V4'S are music to the seat of my pants...
> 1952 De Havilland Chipmunk...
> Yank and bank your brains loose...
> http://members.ebay.com/aboutme/-xlax-/
> http://home.comcast.net/~netters2/
> http://www.fox302.com/index.pl?s=vg&user=netters2
> http://www.flickr.com/photos/55532474@N00/?saved=1
> http://www.flickr.com/photos/10503451@N07/
>
>



--
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/