| Author | Message | ||
     Surlypacer |
I have a 04 xb12s. I switch my tires to perelli Diablo's tires. The steering changed due to the added height and lowered back. Can some one with Diablo's tell me how many lines of there forks are showing about the triple tress. Not the pre-load adjusters. Did buell make a change to the set up when they switch from Dunlop to perllie's? | ||
| Andymnelson |
no changes in setup from the factory. The fork height is a set height- there's a ring around the fork a little bit down from the top that keeps them from sliding up through the trees, that's where are always are from the factory, and where they should remain. | ||
| Greg_e |
Did you get the correct size tires? Shouldn't be much of a change in height to either one other than you have a 1/4 inch of rubber that gets worn away during the life of a tire. Did you check the pressures to make sure they are inflated to where the tire wants to be? I have Pilot Power on both ends so I can't help other than to check those two things. | ||
| Surlypacer |
yes correct size tires, i'm kind of nit picking here. The steering is a little different than before. | ||
| Greg_e |
If the old front or rear had been squared off like most tires do, then they have an extremely quick transition from straight up to leaned over and that might be one of the differences. Sidewall stiffness may also be considerably different and you may need a couple extra pound in the Pirelli tires to make them feel the same. What was installed before? | ||
| Surlypacer |
Dunlop's 207 oem tire. I looked in the manual and they don't give a spec for the fork height in the triple trees. That's why im asking someone to post their factory settings with diablo tires. Different brand of tires have different tire circumference. This will effect your handling. Metzlers and perelli's tend to be taller in the front and lower in the back, Dunlops lower in the front taller in the back. | ||
| Terrys1980 |
If you look on the fork tube, there is a clip(or a groove where the clip should be) this is where the bottom of the upper tree should sit. The fork height in the triples trees should not be changed regardless of what brand tire you are running. If it is change, it will throw the geometry of the bike and steering. I have the forks raised in the triples trees on my bike but only because the rear has been lowered also. Your discussion is irrelevant. The only adjustments you should be worrying about is preload, compression and rebound. These can be changed to match the tires that are made differently. (Message edited by terrys1980 on June 14, 2011) | ||
| Greg_e |
Well, I still suggest trying different pressures in both front and rear. Also if you need the back end to sit up higher, why not crank one more step into the rear spring to change the sag? Same with the front to reduce the preload by one or maybe two lines. Or you can always go back to the Dunlops. | ||
| Rsh |
2 lines above the triple clamp, the 2nd line is even with the top clamp. | ||
| Surlypacer |
Here is an article by sport rider. Tires can change the way a bike handles. I have done this many times on my ducati's. Not all tires are the same. http://www.sportrider.com/tech/146_0202_ride_heigh t_adjustment/index.html I do not like to use my suspension adjustment to change a bikes geometry. I miss my ducati's very much, you could tune the turning characteristics with the proper offset steering head bearing, fork height and shock ride height. | ||
| Greg_e |
Then maybe you should go back to them. | ||
| Surlypacer |
Its not that i don't like my buell, I love it. Just wish i had more adjustments with the suspension. | ||
| Rsh |
When I switched from the original Dunlop 207's to Pirelli Diablo's along time ago I noticed what you are talking about. The diameter of the 180 55 17 Pirelli tire is taller than the original Dunlop 207 rear tire, it changed the steering feel, and the gear ratio slightly. It took me at least a month of changing different things before I was happy with the handling and feel again. Initially I just lowered the rear pre-load a notch or two, while the handling felt improved, the rear ride height was to low. I reset the rear preload to get the proper sag, and I worked on adjusting the fork height in the triple clamps, I ended up sliding the forks 2 millimeters which is slightly below the top line on the forks, now the bike rails. It's unfortunate the XB's do not have rear ride height adjustment. The only way to get it is with an aftermarket shock. | ||
| Surlypacer |
You mean the top adjustment line on the fork. Just want to make sure I understand you adjustment | ||
| Rsh |
On your current setup can you see the 2 lines that look a bit like scribe marks on the fork tubes that are above the top triple clamp?, those are the lines i am referring to. The first line is 10mm down from the bottom of the fork cap, the 2nd line is 13mm down from the bottom of the fork cap, the 2nd line (13mm) is the factory set position, I set mine at 11mm from the bottom of the fork cap with the Pirelli's, works pretty good. Obviously you have to loosen the triples to slide the forks 2mm, then retighten/torque the triple clamp hardware and your done. | ||
| Surlypacer |
Thank you |
