Useful Blaster gearing info

[99LRDblaster]

Not trying to thread jack, but am extremely curious why so many decide to gear up. Almost all pipes for the blaster are somewhere in the mid-high range, most porting jobs extend top-end while losing in the low-end, I would think that gearing is the one successful way to get more low-end especially for trail riding (I guess I can understand if looking just for top speed). Just my opinion here, but it seems as gearing lower for instance 12/43 to compensate for lost low-end when modding is much better than gearing high when almost all blaster motor mods are mid-high based. I personally hated 14/40 and felt a noticeable loss in low end riding trails. After about five gearing choices 14/40, 14/41, 13/41, 13/43, then 12/43. I found the latter to be the best gearing for riding tight trails, especially when gaining elevation.

After getting the engine ported, going through 1-3 gears goes by absurdly fast with 14/40 for me. At 13/40 it was just plain absurd and tiring. Blasters are geared down a bit in stock trim. They could probably afford a better 13/38 gearing or something along those lines, but it's not really unnecessary. The other reason is because my friends and myself take a lot of roads to other trail spots and I need some higher speed to cruise to some locations when I am keeping up with YFZ's, DS450s, 700s, etc......I am not near their top speed but it helps to stay closer. 14/40 works fine for me though on the trails. If I did MX racing or something like that, it would depend on the track, but I would gear way down then to a 13/43 if need be. I'm not a big fan of ridiculously jerky and quick power when I have to shift between gears though. I might gear down for Wayne National when we go in June though and un 13/40 stock gearing simply because of they like to go and do lots of hill climbing the gearing will help out there. It's all situation specific I suppose.

 

[Luni]

So, post a dyno of a relatively stock internaled blaster. How high does it spin.

Remember, the top speed isnt a function of the engines HP output necessarily, just whether it has enough HP to overcome the air resistance at the speed its going vs the RPM its spinning.

Your dyno shows the engine clearly spinning above 9k. It isnt making peak power up there, but at 9k its still making more power than a stock blaster, so it WILL have enough HP to overcome the wind resistance and hit a higher max speed than one that cant spin that high.