Don't bother, just get the die grinder (or hammer and cold chisel, if you are from Australia) and open up the gearbox to the crank case, plenty of volume and oil and lubieness.
Forum whore
Don't bother, just get the die grinder (or hammer and cold chisel, if you are from Australia) and open up the gearbox to the crank case, plenty of volume and oil and lubieness.
Muddler/Dabbler.
Go back again Neil and have another look, I've got the right one on there now! - I hadn't properly checked out the one I posted originally before posting it.Originally Posted by Flettner
Better?
Now I bet you wish you had gone four stroke!
Bogeyman
Plenty of older machinery had "dippers" on the bigend, either cast in or just a bent bit of pipe braized onto the bigend cap.
Not sure if the resulting pressure would be enough to feed the mains at 30K though...
Go soothingly on the grease mud, as there lurks the skid demon
Muddler/Dabbler.
Yeah, the faithful old Briggs uses a simple 'slinger' (centrifugal fan?) driven off the crankshaft but as you say........at 30.000, maybe not!.
BTW Neil, just look at this graph! - note the flat torque curve of the CX25 Honda! - you don't often see that "stump pulling" grunt from a two stroke!
Anorak
Stump pullingYeah, the faithful old Briggs uses a simple 'slinger' (centrifugal fan?) driven off the crankshaft but as you say........at 30.000, maybe not!.
BTW Neil, just look at this graph! - note the flat torque curve of the CX25 Honda! - you don't often see that "stump pulling" grunt from a two stroke!more likely a twig tugger or a leaf blower.
Hit and mist lubrication went out with 1920's indian scouts.
Plain bearings need pressure
Kinky is using a feather. Perverted is using the whole chicken
Hardcore Biker
seems like someone mentioned something about the piston being cushioned possibly. would that be possible if the crankcase was mostly sealed with all but a small vent ?
Muddler/Dabbler.
Oh? - well, guess even I can be wrong sometimes!Stump pulling
Hit and mist lubrication went out with 1920's indian scouts.
Plain bearings need pressure
Anorak
Well I could be too, but the old mist lubrication on the Bert Monroe Indian hamstrung the bike somewhat, even when argumented with the std Aux plunger the bearing turned a nice pretty shade of blue after each run.Oh? - well, guess even I can be wrong sometimes!
Kinky is using a feather. Perverted is using the whole chicken
Forum whore
If you want huge pumping losses, there is no better way Peewee.
Muddler/Dabbler.
He only needed one good run!
Sorry, we're becoming a little flippant Frits & Peewee, but we're keeping the thread going (for the first time) because the Rugby World Cup and Moto GP are hogging all the attention at the moment!
Forum whore
BTW Neil, just look at this graph! - note the flat torque curve of the CX25 Honda! - you don't often see that "stump pulling" grunt from a two stroke!
This is my Suzuki GP125 in its 28hp and pumper carb days, those long flat 2T torque curves are a common feature for the GP.
The GP uses mist lubrication of the piston and crank bearings too....
Anorak
Records are set with two runs within an hour in opposite directions.
Kinky is using a feather. Perverted is using the whole chicken
Hardcore Biker
100cc in a 125cc 2-stroke crankcase, that would probaly fill the crankcase up to the shaft and than you would have the big-end go through it every rev ? it would lubricate it yes, but it would cause a lot of resistance/friction, not only going through but also between the crankwebs and cases.
and how many engines do you know that use only 100cc to lubricate it, and can withstand up to 30.000 rpm without overheating the oil ? Even if you do oil-changes quickly , how are you gonna do them ? take of the cylinder each time ? install a drain plug (that in some engines needs to go through the water jacket arround the cases) ?
would give the same problems as above as the level of oil would need to remain the same if you want to keep your gearbox alive, and you'd allow unfilterd gearbox in your bearrings and big-end - in some engines even oil diluted with clutchwear.
Muddler/Dabbler.
True, and if we are looking for friction free bearings I guess needles are the best way to go, even the Guzzi V8 with its one piece crankshaft (rods with split big ends and cages). - no high pressure oil needed there.those long flat 2T torque curves are a common feature for the GP.
The GP uses mist lubrication of the piston and crank bearings too....
I guess that two strokes can be made to have whatever torque curve you like by appropriate port timing, just like four strokes can be manipulated by changing the cam timing.
BTW. I remember Suzuki two strokes having oil pumps delivering oil directly through the crankpins, but the racing guys preferred to discard the oil pump and use conventional petrol/oil mix, why was that? was the amount of oil they delivered a bit unreliable?
Hardcore Biker
Well youre right Fletto. The point being we can always get better with time. Just look at us Ozzies, hammer and cold chisel one day then just one guy blacksmithing a Ryger con rod
,
a few years later we then had a team of guys making them, soaring production levels.
Even our close neighbours across the Tasman, they have developed, refined their methods as well. Particularly with farming, where good locations are essential. Location, location, location, the catch cry of real estate agents the world over.
"Success is the ability to go from one failure to another with no loss of enthusiasm.
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