gx100 honda

[dirtwarrior]

I am having a friction kit built and using the honda gx100 engine in my usx trike. Should I go with this engine which is a low RPM torque monster or go with the gxh 50 honda which has to rev to get power out of it

 

[dirtwarrior]

I hope someone responds soon. I am going to prepay for the kit and don't know which way to go.

 

[butre]

torque is king

 

[dirtwarrior]

Twice the displacement (about 100ccs versus 50 ccs), half the engine speed (3600 rpm versus over 7000 rpm), twice the weight (23 lbs. versus under 12 lbs.) for 12% more power than the the GXH50.

from another thread
OK with the 50cc engine turning max safe RPM qand going about 30 mph can I assume the 100cc turning 1/2 the rpm will go 15 mph

 

[butre]

that all depends on gearing. if there's only a 12% power gain go 50, I figured it would be more like 70%

 

[dirtwarrior]

the torque is double
If the gearing is the same will the 100 turning 3600 RPM be a lot slower than the 50 turning 7000 RPM using the same gear ratio.
Also will the 100 hold up longer since it is turning less RPM