Running full blast

sisdavid · #1 (**permalink**) 05-03-2008, 09:11 AM

I think my engine will run longer if I operate it at full blast after warm up all the time, seems to really like it. Like a chain saw or weed wacker. Am I wrong to think this just seems better. Seems smoother operation.

Pablo · #2 (**permalink**) 05-03-2008, 09:24 AM

Well they do like to run.....by "run longer", do you mean last longer?

I suppose in some ways, maybe. But like most things with wear surfaces, the more the use the more the wear. Use a good oil, mixed a bit rich and go.....

Personally if I get a year or two out of mine, it's all joy. I haven't killed it...........YET!

**CRUISER** · #3 (**permalink**) 05-03-2008, 09:56 AM

mine does around 36 mph full blast and it may be good for the motor i am not really sure thier but not for the bicyle, motor mounts, and everything else. i ussually cruise around 30 mph with my 70cc motorized bicycle

Jemma Hawtrey · #4 (**permalink**) 05-03-2008, 01:40 PM

I can get just over 33mph out of the 32cc I ride - and it seems to like flat out and not have any problems doing 20 miles at that speed..

However under 20mph is a different proposition - it sounds rough and uneven as if it doesnt like that speed and my 'mechanical ear' doesnt like the sound it makes either..

I think, definately with the commercial engines, that they are designed to run full power for extended periods and for some reason they dont like partial speed running as much...

As long as the petroil mixture and such is correct and the state of the bike/tires/mounts etc is monitored these machines should run wide open all day

Jemma xx

toytime · #5 (**permalink**) 05-03-2008, 02:10 PM

Like Jemma, my mechanical ear hurts when my motor is clanging around. I use almost two ozs. of amsoil per litre of gas as this seems to slow things down a bit but my china girl seems happy with this mix. As far as going full out all day , I would never do that and prefer to give it short blasts.

VENICE BOY · #6 (**permalink**) 05-03-2008, 03:04 PM

Every engine is different, I run each one at whatever speed it likes best...
I built one two days ago than runs really solid & crisp from 1/2 throttle all the way up.
The "Bomber" loves it at full throttle, my old "Indian" bike liked it at 3/4... ?
Just go a little fat on the oil mix, & run it where it likes!

**Bikeguy Joe** · #7 (**permalink**) 05-04-2008, 07:04 AM

Maybe this will shed some light on the subject...

A given engines' "redline" is what the engine was designed to run at for it's ''service life", service life being defined as when the engine is no longer within factory specs..

So, if the engine has a 6000 rpm redline and a 500 hour service life, then if run at 75% of redlline, it should run 25% longer before it needs to be rebuilt. 50% of redline all the time would result in a 50% longer service life ect.

HOWEVER since these frame mount engines can vary wildly in quality control, one can only assume that "factory specs" are just as wild of a variable.

Run 'em where they feel/sound good, and don't worry, be happy. If you get 1000 miles from one, you got your money's worth.

toytime · #8 (**permalink**) 05-04-2008, 07:12 AM

Very well put Joe, I guess the key is to run in the "feel/sound good" zone.

**Bikeguy Joe** · #9 (**permalink**) 05-04-2008, 07:16 AM

Roger that!

sisdavid · #10 (**permalink**) 05-04-2008, 09:54 AM

I guess I will continue to operate mine at full blast mode, and give it a little extra oil just incase. I really have heared that running a two stroke wide open is best. by several reliable sources. Think about it this way you would not run a chain saw or weed wacker at low RPMs