[zr5carb]

have a 2002 zr 500 carb and just wondering what everyone runs for springs and weights?i am running yellow/green cat and 51.5 in primary(stock setup)and red white spring and have run a 57/50 and now a 58/53 in secondary.seems to pull real hard runs right around 8000-8050. what works for you guys?

 

[erics]

change your primary spring to yellow/white. You probably won't see much difference on the lake, but it will pull harder on the trail.

 

[thunderbird]

the 98 zr and zl,s 500,s ran that yellow white primary and the engagement was very high around 5100 now the 02 primary engages at around 4800-5000 tops which i think personally is better suited to the new powervalved 500 it realy builds power lower than 98 500 just my o2

 

[finner]

try a 53/51 cam too

 

[zr5carb]

53/51 was stock helix.had great backshift but didnt pull like it does with currrent helix B)

 

[AZRACING]

I've got a speedwerx kit that uses a 55.5gr arms 57/52x cam engagement is 4900 rpms. Carbs are jetted down 2 sizes with a DnD Power Breather with the cone in the air box. This sled will run neck n neck with a friends ZR600 carb that has power breather & timing key. I've only run against 600 class sleds, need to find some 500's to line up with to compair. RPM's run 8200-8300.