BGF 49cc rear friction wheel tank size?

Discussion in 'Painting, Welding, Bending and Gas Tanks' started by bilboby, Aug 28, 2010.

  1. bilboby

    bilboby Member


    Can anyone help in giving info on the gallon/litre tank size supplied with the 49cc BGF rear wheel friction engine kit. I've now gotton hold of a baby feeding bottle which has OZ & ml markings & thus will be used for measuring the oil/gas mix, something i didn't think of using before but thank's to you guy's i will be now.

    73's & Happy MB Riding

  2. 5-7HEAVEN

    5-7HEAVEN Guest

    Not familiar with that BGF or tank size.

    HOWEVER, you should be able to measure how much the tank holds. Fill it to its maximum. Then place a large measuring cup below the petcock. Keep filling the cup until the tank runs out. Add up how many cups and voila! You know exactly how much fuel your tank holds.

    This is the most precise way of calculating gas mileage. Fill tank and record its exact amount on paper. Set your odometer. Ride your bike all day. Then drain the remaining fuel into the measuring cup. Subtracting this amount from what you started with. Observe your odometer reading. If you used one quart of fuel and traveled 25 miles, then you're getting 100 mpg.:detective:

    Hope this helps someone.
  3. bilboby

    bilboby Member

    Cheers & once again from a good reply but i don't have time for testing the logic thus have emailed ONCE AGAIN BGF for an answer, if they reply that is?
  4. 5-7HEAVEN

    5-7HEAVEN Guest

    Okay, I have an easier way of calculating tank capacity. You WILL have time for this, because you'll be doing this on a regular basis.

    Fill a 16 oz. measuring cup with fuel, and pour it into the tank. Not full yet? Then refill the cup and pour it in. It's almost full and you have 2 oz. left in the cup? Then your tank's max is a little over 30 oz.

    If your fuel/oil ratio is 20:1, pour 1.5 oz. oil in, stir with clean swizzle stick and that's it.

    I tried googling for tank size, but no luck. This way is "garans-ball barans" and hasn't wasted any time.

    Then the next time you premix your fuel, fill your tank using the measuring cups. You'll then know EXACTLY how much your tank holds.
  5. Stan4d

    Stan4d New Member

    If you are choosing the answer from BGF over this site I question your sanity.
    Thank you.
  6. Whizzerd

    Whizzerd Member

    CQ...CQ Bilbody! I had a BGF F/D and it failed within 5 miles. One of my BikeMotorParts units now has OVER 700 miles. Good Luck w/ your BGF. The engine's not bad! Recommended fuel/oil ratio is 25:1. Do you still QSL or just use a cellphone? 73's
  7. Esteban

    Esteban Active Member

  8. bilboby

    bilboby Member

    Well surprise surprise for i have finally received a response from BGF concerning the fuel tank size sold with the rear friction engine kit. The tank holds just 1/2 gallon which is 2 liters thus for breaking in the engine @ 16:1 the oil mix should be about 125ml? I'm now aware that i was definately putting in the wrong amount of oil hence why the never ending problem with my MB. Once again thank's for everyone's help as it's the MB rider members like you that make this forum worth visiting and learning from despite my old age. Cheers & 73's
  9. GearNut

    GearNut Active Member

  10. Stan4d

    Stan4d New Member

  11. bilboby

    bilboby Member

    Attached Files:

  12. 5-7HEAVEN

    5-7HEAVEN Guest

    Ooooh, a twin-engined bike, once you install the drivetrain!
  13. Stan4d

    Stan4d New Member

    My apologies.....looked up the wrong kit.

    Looks like there is a third motor on top.
    Are those back up drive systems, or are you experimenting to see which is the best.
  14. 5-7HEAVEN

    5-7HEAVEN Guest

    Please sell me that ACTIVE engine.

    Naahhh, just kidding, but it's a good one!:jester:
  15. bilboby

    bilboby Member

    Hello MB'ers,

    I'd better explain that the reason for having 3 engines is just for showing what i've got in terms of back up should one engine or the other fail. The main engine is the 80cc sitting in the V frame but currently have got a mechanical issue despite it being brand new and never run.

    The 2nd engine is the BGF friction drive type for which the problems i've been having with it have been well documented on this site forum. I now accept full responsibility for the BGF motor problem because of my lack of understanding before on 2 stroke oil/gas mix.

    The 3rd engine (Active) is a 49cc and has been given a new lease of life after stripping it from a chucked out Puzey Evo 2x Powerboard.

    Hopefully when we get some settled sunny weather here i'll give the BGF motor another trial run but with the good mix quota of 125ml. If all else fails then the Active engine will be used in it's place as a friction drive MB though ideally i'm looking for having both the V frame & BGF engine running just for backup. Reason being that i live in a valley and the friction engine is very slow climbing the 1.7km hill which feels like 12.5% thus i'm thinking the main 80cc would ride the hill better? Eitherway both engines need too be working and if not atleast i've still got the Active meaning i'll have to push the MB up the d*mned hill.:sweatdrop:

    Cheers for your help & intrest

    Good MB riding

    NB: Having two motors + my 230lbs will mean extra weight thus use up more fuel per km than a single engine MB?
  16. GearNut

    GearNut Active Member

    Why not have both engines mounted and run both of them only when you have to climb that d*mned hill? Use the other engine on flat land only.
    If the law pulls you over for having too much engine for an MB, you can show that only one is hot from operation, the other engine is cold due to saving it as a back up.