Beta 450 RR 4T Fork Seals

Fork specs for the Beta 450 RR 4T vary by year (see the table below).Every kit here is verified by the manufacturer to fit this exact bike. Fork seals can share a size and still not seat in a different fork, so we only list what is confirmed for your bike.

  • Fork typeUpside-down
YearsFork tubeFork
2005–2010 45 mm marzocchi
2011 50 mm marzocchi
2012–2014 48 mm marzocchi
KitYearsSeal sizeReplaces OEM
55-130 2011 50x63x11 n/a
55-132 2012–2014 48x58x8.5 Honda 51490-MEN-A31, Honda 51490-MEN-003, Kawasaki 92049-0074, Yamaha 1C3-23145-L0-00
55-135 2005–2010 45x58x11 n/a
57-105 2012–2014 n/a n/a
57-138 2005–2010 n/a n/a
57-140 2011 n/a n/a
56-145 2011 n/a n/a
56-147 2012–2014 n/a n/a

Verified fork kits we stock for your Beta 450 RR 4T

Fork oil for your Beta 450 RR 4T

A fork-oil change on the Beta 450 RR 4T uses 7.5wt fork oil, about 600 ml per leg (oil level 90 mm). Factory fill: AGIP/Eni Fork 7.5 (SAE 7.5).