14-10-13, 09:12 AM
Rob,
Hard to say for sure, but it may be the standard springs holding things back.
Both my conversions used alternative fork springs and it may be the case that the FZS springs just aren't up to the job no matter what tweaking you do.
Although I used Racetech linear springs 1st time round, with the Debrix emu installation I used Honda VFR progressive springs. The improvement appears to be in the length of spring dedicated to hard / soft. The pictures below indicate the VFR springs, then a pic with a TRX850 linear spring and the bottom spring from my Fazer 600. The difference in the amount of tighter wound coils is quite obvious between VFR & Fazer. I suspect that this is the problem, and Yamaha got the ratio & spring rate wrong for the bike - too much spring dedicated to soft travel and the stiff part of the spring too high a spring rate to try & compensate.
Rather than choking on £85 for suitable K-tech linear springs, you can get 41 mm springs from other bikes to fit for £10-30 if you're patient on ebay. I'll keep a lookout & let you know if I see anything that may be suitable if you want.
VFR 800 (pre V-tech) springs:
![[Image: VFR800forksprings_zps2a257a34.jpg]](http://i233.photobucket.com/albums/ee91/kebab19/VFR800forksprings_zps2a257a34.jpg)
TRX850 spring & FZS Fazer spring:
![[Image: TRX850ampFZS600springs_zps23b5b2ef.jpg]](http://i233.photobucket.com/albums/ee91/kebab19/TRX850ampFZS600springs_zps23b5b2ef.jpg)
Hard to say for sure, but it may be the standard springs holding things back.
Both my conversions used alternative fork springs and it may be the case that the FZS springs just aren't up to the job no matter what tweaking you do.
Although I used Racetech linear springs 1st time round, with the Debrix emu installation I used Honda VFR progressive springs. The improvement appears to be in the length of spring dedicated to hard / soft. The pictures below indicate the VFR springs, then a pic with a TRX850 linear spring and the bottom spring from my Fazer 600. The difference in the amount of tighter wound coils is quite obvious between VFR & Fazer. I suspect that this is the problem, and Yamaha got the ratio & spring rate wrong for the bike - too much spring dedicated to soft travel and the stiff part of the spring too high a spring rate to try & compensate.
Rather than choking on £85 for suitable K-tech linear springs, you can get 41 mm springs from other bikes to fit for £10-30 if you're patient on ebay. I'll keep a lookout & let you know if I see anything that may be suitable if you want.
VFR 800 (pre V-tech) springs:
TRX850 spring & FZS Fazer spring: