I would agree with Tex, except to add that our 25r has not shown any signs of wearing down after 2.5 gallons (non-racing action). Ours holds a tune very well with just the usual HSN adjustments for air temp and humidity. Never have timed it but it goes ok, maybe high 30mph's. When it's a little lean it wheelies like crazy with acceptable temps. Maybe we just got a good one?

We're getting tired of waiting for it to crap out so we can get an OS18tm!!!