I would say after 2 washers aren't good enough, it's time to move up a size in jets.... The reason you're finding top end isn't so good, is because the needle shims are meant to be a low-end fix.... They allow more fuel in when the throttle is almost fully closed (low end), but have a negligible effect on top end.... You need a bigger jet to be able to dump more gas in when the throttle is wide open. I would suggest rejetting one size bigger. Test it, and if it's bogging on the low end, add ONE shim.... If it's still no good, then add the second washer. But, keep in mind, since you're rejetting, you won't need as much shimming as you do now...
Also keep in mind, with the snorkel removed, and a shorty exhaust, your engine is breathing better, on the inhale and exhale side. This means you can dump in more fuel. That's why I said what I said above. Hope this helps.
By the way, does anybody else's Firefox know how to spell rejetting?
Also keep in mind, with the snorkel removed, and a shorty exhaust, your engine is breathing better, on the inhale and exhale side. This means you can dump in more fuel. That's why I said what I said above. Hope this helps.
By the way, does anybody else's Firefox know how to spell rejetting?