full throttle?

[Howitt]

Is it damaging to ride a motorized bike with an 80cc happy time motor at full throttle for a long time? I will be using my motorized bike to travel 24km to work and would like to try and get there as fast as I can.

[Dave31]

I have never held it wide open for a very long time. I usually will feather the throttle every now and then. I'm not sure if holding it wide open would hurt it, but the way these motors are made I would not.
Maybe you might want to change the sprocket to get more speed?

[deacon]

I'm not sure about wide open all the time because frankly the bike scares **** out of me wide open. It isn't blowing the engine that scares me it's hitting that big pot hole at thirty miles an hour that does it for me.

[nitroscope8]

I've been riding full throttle for a while. I see no harm. Just back off when the vibration barrier comes up.

[sisdavid]

I drove to the hardware store wide open the entire time about 20 minutes. Was really fun. I would use about 5 ounces of good quality oil semisinthetic.

[Pablo]

Originally Posted by Howitt

Is it damaging to ride a motorized bike with an 80cc happy time motor at full throttle for a long time? I will be using my motorized bike to travel 24km to work and would like to try and get there as fast as I can.

Well balanced, well breathing 2-stroke gas ICE's do best in their powerband. Sometimes that isn't always full throttle.

Tell me more about the bike. But from the start I would say you need more power to the ground and merely suggest the following:

1) General tune, right oil mix, good spark plug and wire.
2) Port and polish the intake and exhaust.
3) Install an expansion chamber.
4) Get a shifter kit and take advantage of gears if you can.

I can do 40 mph in 4th gear and have yet to explore 5th and 6th.

[Skyliner70cc]

My reply:

New engine not broken in: Holding the same throttle setting and/or load on engine will not properly break in your engine. A new engine needs a lot of variability in engine rpm and engine load. WOT and heavy loads and/or high rpm for short periods of time are essential.

Broken in engine: WOT operation wtihout overrevving engine is just fine provided mixture is not too lean. When I lived at high altitude, WOT was I rode most of the time.

[Pablo]

Good points Skyliner

[Howitt]

larger sprocket gives more speed? interesting.

[Howitt]

what mixture ratio would you suggest I use for WOT for 24km in toronto?