MOPED ARMY

Ken Roff Wrote:

-------------------------------------------------------

WOOO!! "This is exactly what I wanted to know but never see anyone talk about" With only having a 0.91 of a gallon for fuel and the 250 Ninja getting between 60 to 65 MPG I did not want to drop to much below 60 MPG even if I cannot park the Ninja on the Side walk :)

I have a 14 MM Carb and was seriously looking at the 17 or 19 PHBG trying to balance the performance and mileage along with avoiding doing a lot of work for very little gain. With just your information I now KNOW I am not going bigger than a 19 MM. I apperciate the 100% answer that covered the questions I was thinking but did not ask!

Nick SWOOP Wrote:

-------------------------------------------------------

I thought getting MPG in the 50's was possible but never imagined getting much worse then that (to be Honest)! If I had a 2 gallon Fuel Tank I would be Ok in the 50's (MPG) but not being able to travel more than 30 to 35 miles before reserve would make riding a lot less enjoyable and seriously limit where I could ride to. (Another reason I need to remove the Oil Tank and install a Secondary Fuel tank) Even if at Max I can only add .5 gallons, at least I can ride the bike 100 miles before needing more fuel.

. (Nick) Wrote:

-------------------------------------------------------

"180" Main?? I only run a 200 Main in a set of 40 MM Carbs on my 1056 CC Road Bike which has 4 cylinders of over 260 CC each! WFO it also gets in the high 20's to low 30's. I am quickly losing my desire for a larger carb. I know that 2 strokes can drink fuel but thought How bad can it be with only 70 CC?? Answer A LOT worse than I imagined. I now know why no one ever post about this now.

Right ^^ 2 strokes get horrible mpg with big carbs

My 17 ft boat with a 3cyl 85hp engine got 4 mpg at 22-23 knots (25 mph)but at WOT got less then 2mpg.

Your 250cc Ninja though a 4 stroke would get half the mpg it gets if you went or could go WOT all the time.

I get much better city Mpg or better all round mph if I'm going on 35 mph roads.

Just yesterday "I went around the block" (12 mi) on state route with my hand twisted all down for more then half the trip. When I got back I added almost 1/2 gallon of mix to top off my magnum's tank.

Yikes I can't afford the 3+ gallons of premium and synthetic oil mix a week just to ride a hr a day. I'm gonna have to put 19mm carbs on all my bikes though the Gila bikes love 24mm carbs though.

I like stock 100mpg bikes but where I live after I get out of my development they're kinda dangerous and I really could only go north/northwest

South and east have hi speed roads and several steep hills.

To blast you got to pay I guess.

Nick Schroetter Wrote:

-------------------------------------------------------

Seriously!! How do you use the "Search" function here? I typed in "Fuel Mileage" and it brought up "1" item!! Most search functions I have used would have flooded the return with anything that had the words Fuel or Mileage and I got "1" Return. Yes, this will help if I can at least know the "Secret" to using Search Here on Moped Army! (Because I KNEW Someone should have mentioned it somewhere in the past and KNEW someone would think I had not searched! Thank you!

Ken Roff Wrote:

-------------------------------------------------------

Yes, it is the Compromise between what you can live with and what the cost are. I knew I needed about 50 MPH to be safe (Just in Washington DC) because the Max speed is about 45 MPH. Most of the streets are 25 so 35 is needed and the Legal Limit for Mopeds on "Level" Ground. WHen I am on state routes in Virginia by the Pentagon and the SPeed Limit is 45 and the Police will pull you over at 46 MPH I am close to maxed out at 45.

SO I am going to a 22 tooth rear for a 50 MPH Top SPeed and cruise at 40 to 45 and first try the 19 MM Carb. I saw the Weekends Manifold which was a lot of straight tubing cut angled and welded for a good fit but I want a Bent tube like MLM Usually makes for a smooth flow but do not want the carb sticking out the side to avoid the issues when I am in the Rain!

Vm 20 is not 24mm

I get 60ish mph out of my 19mm phbg

And that is at 50-55 mph

So ya 19mm is good for mph

whats it feel like to own a 250ninja? Is it awesome? I bet its awesome!

Nick, Several of the replies you got where for the same threads but I still want to know how you use the search because it totally frustrates me!

Seems to me a Mikuni 16mm would be fine on your Tomos

Flagrant - Wrote:

-------------------------------------------------------

That is not a lot bigger?? I am totally familiar with Mikuni's and they are very good Carbs but I am trying to avoid taking "Steps"!! 14, 16, then 18 or 19. I want to retain the Bottom End which a 16 would not hurt, but I also want to make as much power as possible with Reasonable Fuel Mileage. I will look and see what results were obtained with this small increase.

19mm is prob the best balanced carb for power/mpg

on a tomos, or a puch 2 speed, you can run a 16 phbg, 16sha, 15 bing, or a 16 mikuni and you'd blast your tits off all day if you slip the clutch a little bit (5w-20 oil in da gearbox)

i have a 21mm phbg on a stock derbi, and it gets ass shit mileage on my tiny tank. I wanted to use a 19, but I guess the previous owner did a REALLY nice job of boring it out, because its a 21mm now. But the power is grrrrrrrrrrrrrrrrrrrrreat!

variated bikes you can have smaller carbs, or on geared bikes make them slip more, and you can reduce the carb size and still have that takeoff

i get great milage.

i rode 50 miles yesterday on my bike. 28mm carb. i Blasted all of those miles.

Flagrant - Wrote:

-------------------------------------------------------

Now this is something I had not heard or seen. I will do a little searching on this. I know the usual question is how would you cable this? Now that you bring this up, I can imagine someone having 2 - 10 MM Carbs with a Motorcycle dual throttle cable with one having an excessive amount of play so that up to 1/2 throttle you have 1 carb open and after 50% (Could also start at 25% or any other perfentage)Thottle the second carb would start to open so at WOT you have 20 MM of Venturi! Thanks for stirring the idea!