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apex jeff

Well-known member
Lifetime Membership
Mar 2, 2009
256
128
43
columbia falls mt
how much weight should i have in 8bu or total weight of each for 10 to 15 lbs boost

If you have the 8BU-17605-00 at 48.7 grams add two 17.2mm rivets (4.5g) each ,fully loaded 57.7 grams. At your riding elevation you should be turning 8800 to 9000 rpm.From there you can fine tune with spring rate, heavier spring rate acts like lighter weight yielding higher rpm, where lighter spring weight brings rpm down.Remember one change at a time.

Jeff
 
S

seano700

Active member
Dec 10, 2007
234
31
28
Peace River, Ab
8bu's

I used to run 8bu's fully loaded with .5g washers squeezed inbehind both rivits and that was good to 12-13psi. This year I got the mpi brass ones giving me 65ish grams total mass. Ran 17psi in vale pulling 8600.. Works good.

I run
14.5mm rollers
Bwb primary
Ac purple sec spring
45deg straight

If your close to this you should have no problems getting to the nose bleed section.
 
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