by CycleRob » Thu Jul 29, 2010 4:17 pm
ChiTown,
If you are still here . . . my negative vote for USD forks compared to conventional forks was aimed at "street riding" by the majority of riders. To the over-the-edge 10% of riders that need high performance equipment, USDFs can provide that extra measure. For the other 90%, they are not an asset. I put Boxer and myself in that group. For us, practicality and longevity are much higher on the list than winning on the track and precisely why I wrote that carefully worded warning:
USD forktubes are a PITA to keep clean, have a shorter service life and are more expensive to service or repair. The street riding performance gain over conventional forks is nearly invisible when both are properly set up. That opinion is based on replacing a few hundred USD and conventional fork seals and also installing Gold Valve kits in street and track only bikes.
I have seen the shock on the faces of customers when shown the damage and learn of the just the necessary replacement parts price total. Those USDF lower forktubes are very expensive because the Aluminum lower portion that holds the axle is bonded to the (often irreparably damaged) steel tube uppers. DirtBike owners with USDFs, even if they are fanatical about forktube cleanliness, will be punished by the USDF design that puts the forktube seal travel area in the soupy dirt storm that surrounds the front wheel. On USDFs the more expensive hardened tube surface coatings help, but there still is the vulnerability of the rubber seal. Ironically, the R1200GS is the very best front fork design there is because the seal travel area is way up top, out of the damaging debris field. Also, the TeleLever's shock replacement, upgrade or modifications are easy to do in your garage with a credit card and shippers like UPS.
This reminds me of the KillSwitch debate where I was in the minority. Both then and now I based my recommendation on years of practical experience selling the replacement parts to the more popular opposing group. I'm not some sort of vindictive KillJoy, just the service dept wrench that has BTDT and willing to pass on the lessons learned to those that have a choice.
.
`09 F800ST
Member since Sept 10, 2001
Only one who can see the invisible
can do the impossible.