I just did it because it was cheaper
Funnily enough I'm using standard sizes, with the extra power I now have it pulls standard gearing like a standard bike with two teeth up on the back.
And I think it'll pull to just under the redline in fourth as I go over the line on the drag strip.
But I'm taking some alternative sprockets when I next go, as one year it was necessary to change into fourth bout twenty yards before the line; I either held on to third and did the last ten yards on the rev limiter, or changed into fourth and just got the clutch out as I went over the line.
It's not falling off, it's an upgrade opportunity.