This is a discussion on 5 Speed Transmission within the Grom Reviews, Rides and Impressions forums, part of the Honda Grom Forums category; Originally Posted by SHPL00P This is something I'd like to know myself, all I've really seen mentioned is like you mention, thinner=weaker gears. Fingers crossed ...
Both engines were the 138 dohc desmos...so high compression..others saying kickstart can break it...so Wondering if anyone has experience here... Ill look at gsx post soon. The tourist option offers 0.8 final drive be good for 80 mph on stock sprocket
In a tucked position, conservative estimate, 16 hp for 75 mph.
Sitting up, average or so sized (not your weight, your overall size), closer to 20 hp. And thats with 0 wind.
Koso 4v is peak torque of ~12.5 ft-lb at ~8k rpm (per their graphs). Not a chance in hell youre hitting 75 at 6500rpm.
excel spreadsheet if anyone wants to try and mess around with it.
I highlighted the parameters you can change, as well as some notes to the right.
info on C_d. https://en.wikipedia.org/wiki/Drag_coefficient
TONS on motorcycle drag: http://www.schultzengineering.us/aero.htm
Although, engineeringtool box gives it a 1.8, which i think is really high. http://www.engineeringtoolbox.com/dr...ent-d_627.html
Last edited by turpinator; 11-21-2016 at 08:47 PM.
ok so I think I get it now.. the speed could be achieved at 6500 however its more to do with the torque produced.. 19HP can get you to that speed easy enough in full tuck maybe even superman position however to do it sitting up the torque required will have to be much more than stock.
I love my grom
I love my grom