For anyone out there thinking of fitting R1 4XV forks, here is what I did to rebuild them. Falcon's guide used to fit them.
Firstly, here is a good 4XV guide http://www.rzrd500.com/500phpBB3/viewtopic.php?t=7770
Laser 6353 spring compressor, £20 new. This is a bit tricky to use with one person as you need more than 2 hands, however I was able to use 2 ratchet straps to compress the spring and hold in place while I undid the nut. Be careful!
Springs - Triumph Street Triple standard springs (2008-2012). 0.95 linear. These measure 258mm compared with 4XV stated length 255mm (mine were more like 250mm)
Oil - Shell Advance 5W. This has a Centistoke rating of 21 compared with standard Yamaha oil of 15.6. Air gap of 100mm used as apposed to standard gap of 78mm. Some internet wisdom suggested a larger gap however 100mm is my starting point
Fork seals. Not leaking but thought I'd change them while they were out. NOK original fitment from Brook Suspension, same as Yamaha but came in at less than £18 and next day delivery.
Not tried it yet but hoping for a positive result.
Firstly, here is a good 4XV guide http://www.rzrd500.com/500phpBB3/viewtopic.php?t=7770
Laser 6353 spring compressor, £20 new. This is a bit tricky to use with one person as you need more than 2 hands, however I was able to use 2 ratchet straps to compress the spring and hold in place while I undid the nut. Be careful!
Springs - Triumph Street Triple standard springs (2008-2012). 0.95 linear. These measure 258mm compared with 4XV stated length 255mm (mine were more like 250mm)
Oil - Shell Advance 5W. This has a Centistoke rating of 21 compared with standard Yamaha oil of 15.6. Air gap of 100mm used as apposed to standard gap of 78mm. Some internet wisdom suggested a larger gap however 100mm is my starting point
Fork seals. Not leaking but thought I'd change them while they were out. NOK original fitment from Brook Suspension, same as Yamaha but came in at less than £18 and next day delivery.
Not tried it yet but hoping for a positive result.