Dog bone leverage ratio?
Posted: Thu Aug 23, 2012 9:31 pm
Any one done a comparason or has measurements on the Mile and Falco swing arm and linkage pivot points?
Reason for asking is that I'm now questioning whether when replacing the Falco shock with a Mille item, one should also use the Mile linkages.
My bike has the 2001 RSVR Ohlins and "long" dog bone linkages that go with it. It has always been on the firm side. I have just had the shock rebuilt at Rev's who also put a slightly softer spring in and I've had a chance to play around with things.
First thing I noticed when going back to standard shock and linkages was that there was more sag available and that there wasn't a lot of difference regarding firmness in the ride. Yes the blue shock was a little harder on the kidnies but what I realy noticed was the drop in ride height.
While getting the old bearings out the RSVR linkages I had a go with the Falco linkages and the rebuilt RSVR shock. Now that when first fitted had a lot of sag which I was comfortably able to reduce to 20mm or so with a further 15 to 20mm when sitting on the bike. Figures which off the top of my head are reasonable and the ride was noticably more compliant and certainly felt a realistic option for the future. I didn't try it two up but I recon it might be a little soft for spirited two up work. I then put the RSVR dog bone and linkages in this immediately hiked the ride height 5 - 10mm or so and removed nearly all Sag (maybe 5mm left). I backed of the Pre load to get 10 -12 mm with another 15mm or so with me on board. Definitely felt firm when I took it out.
I'm suspecting that the linkages are designed to work optimally with the swing arm and that the Mile ones are sub optimal when used with the Falco. Mind you if the relationship of the pivot points on the two arms are the same that theory'd be bollox.
Revs have offered me a set up session which I'd like to take them up on but It's a long motorway haul to get there and which linkages should I fit...
Oh and any one care to lend a swing arm removal tool at some point?
Reason for asking is that I'm now questioning whether when replacing the Falco shock with a Mille item, one should also use the Mile linkages.
My bike has the 2001 RSVR Ohlins and "long" dog bone linkages that go with it. It has always been on the firm side. I have just had the shock rebuilt at Rev's who also put a slightly softer spring in and I've had a chance to play around with things.
First thing I noticed when going back to standard shock and linkages was that there was more sag available and that there wasn't a lot of difference regarding firmness in the ride. Yes the blue shock was a little harder on the kidnies but what I realy noticed was the drop in ride height.
While getting the old bearings out the RSVR linkages I had a go with the Falco linkages and the rebuilt RSVR shock. Now that when first fitted had a lot of sag which I was comfortably able to reduce to 20mm or so with a further 15 to 20mm when sitting on the bike. Figures which off the top of my head are reasonable and the ride was noticably more compliant and certainly felt a realistic option for the future. I didn't try it two up but I recon it might be a little soft for spirited two up work. I then put the RSVR dog bone and linkages in this immediately hiked the ride height 5 - 10mm or so and removed nearly all Sag (maybe 5mm left). I backed of the Pre load to get 10 -12 mm with another 15mm or so with me on board. Definitely felt firm when I took it out.
I'm suspecting that the linkages are designed to work optimally with the swing arm and that the Mile ones are sub optimal when used with the Falco. Mind you if the relationship of the pivot points on the two arms are the same that theory'd be bollox.
Revs have offered me a set up session which I'd like to take them up on but It's a long motorway haul to get there and which linkages should I fit...
Oh and any one care to lend a swing arm removal tool at some point?