Pilot Jetting

[SpecialEd 05]

Hey all. I've been trawling through everybody's jetting combos and I'm wondering if I'll need to go to richer pilots. I've done a top end rebuild, Pro-Lites, Chariot head 21cc domes, T6's, VF3's, Pro-Flow foam filter with lid off, +4 timing. Elevation is 1000' and air temp around 70°F. I'm going to 320 mains, I used to run a vented lid. But do I need to go to 27.5 pilots? Also is stock 25? I see some people with similar mods still running stock pilots.

[SpecialEd 05]

Probably should add that I'm running the Toomey needles.

[dirtydownunder]

sup !

yeh 25 is stock, and youll be fine with them.

[rubberneck]

agreed with a foam filter 25s should be fine thats what i ran when i had similar mods

[SpecialEd 05]

Thanks guys. Got some 27.5's on the way so I can have a play. What would determine whether I need them or not? As in how will it feel if it needs more fuel on the bottom? A slight hesitation/flat spot or something? Lean bog?

[SpecialEd 05]

A bit of an update, I'm thinking of running Pro-Design intake manifolds for V Force reed cages (No boost bottle). I'm assuming this will increase the low speed air velocity and give a bit more bottom end. Will this require the 27.5's rather than stock manifolds? Or should I just get a set of Moose Racing polyurethane ones? I do a lot of trail riding so I want to smoothen the transition from low to high a little bit.