Please pardon if I should have found this info via search
I have an '01 Carbed M750 (see signature block). I know that in '02 the steering stem / triple clamps changed at least insofar as the stem and head-tube diameter:
up through 2001 steering head bearing = 26mm ID, 52mm OD
2002+ steering head bearing = 35mm ID, 55mm OD
The OEM bearing type also changed from roller in the 2001 to ball in the 2002+, but that is of no consequence for my interest.
I'd like to know the head-tube angle (RAKE) and steering stem-to-fork tube dimension (OFFSET) for 2001 and prior vs 2002+
Thanks!
Pre-02:25mm offset, 02-On: 30mm offset
SBKs: 36mm offset
bookmarked. thanks
if i recall, its a 24 degree steering angle
Quote from: a m on October 03, 2010, 08:44:02 AM
if i recall, its a 24 degree steering angle
Sure...
with stock tires, ride height, and no rider.
haha, true
Question for the knowledgeable here: if I had a SBK front end (forks, triple and clip-ons, 65mm caliper spacing, 25mm front axle) that I wanted to put on my 2001 M750 would changing the steering head bearing work for me?
I know that would change the steering geometry and that I would need to get different springs. I'm just wondering if I can get away without modifying my current triples, especially if I'm going to use clip-ons. As for a bearing source, www.accuratebearing.com (//http://) should have them, any other suggestions?
The SBK tripples use a 36mm fork offset, that will greatly reduce the trail on the bike making it unstable. If you realy dont want to modify the triples I would look into the japanesse bike forks as some of them use the same 54mm/50mm forks as the monster. They are far from a direct replacement though.
Your local dealer, SpeedyMoto has tapered bearings, All Balls for bearings. Not sure if the outer diameter is the same, I do know the shaft size is very different on the triples (inner bearing diameter)
Quote from: caperix on October 07, 2010, 03:43:11 PM
The SBK tripples use a 36mm fork offset, that will greatly reduce the trail on the bike making it unstable. If you realy dont want to modify the triples I would look into the japanesse bike forks as some of them use the same 54mm/50mm forks as the monster. They are far from a direct replacement though.
I used to think that more offset = more stability so I'm surprised to see it's the exact opposite.
So it's more rake = more stability (to a certain point), while more offset = less stability.
This image from Wikipedia helped me understand things better:
(http://upload.wikimedia.org/wikipedia/en/c/c7/TrailDIAG2.jpg)
The drawing references bicycles so the offset is near the wheel axle, while on our bikes it's at the triples, however the effect is the same: increasing the offset (aka the rake) decreases the trail and stability.
Quote from: a m on October 07, 2010, 03:50:14 PM
Your local dealer, SpeedyMoto has tapered bearings, All Balls for bearings.
Not even close to them (I wish), but thanks for the info!
think of offset as: the distance between the pivot and the wheel is greater, so a small change of input at the bar, has a bigger effect on the bike.
36mm makes the bike very tipsy.