Unlikely mate. Very unlikely. Even if one miraculously fitted I'd be surprised it would work. I've got TZR box in mine and it wasn't that too different than the DTR in terms of top end. Just shorter 6th.
To be blatenly honest with you mate. With my bike the way it is, it'll top out at 80 at 12K rpm bearing in mind my mods.
And you will be surprised what 2K rpm will get you. Naturally mine will get there nice and fast but still I was expecting a little more but that's life.
If you think someone's messed with the sprockets just buy a new sprocket set and chain. Highly recommend D.I.D chains mines still lasting without and need for adjustment, even the running in period for the chain I didn't have to adjust it.
Top notch. A lot of people will suggest doing a 520 conversion, but personally I never bothered. I lubricate mine every other day or so. You can do it less but I do high mileage on mine.
Mine tops out about 70MPH at 9K I don't want to rally it, I ain't bothered about top speed. As long as I can sit at 50-60MPH with no bother I'm all good. And that little bit more poke should I run into a problem like someone performing a stupid overtake, I can out-power them.
I don't like bikes sitting on the limiter within the speed limits in the top gear, it's just annoying hearing it ringing at 10K RPM's or more doing 50. Like my moped did, lol. That thing was suicidal on dual-carriageways!
