100cc(83cc) BBK, is it Worth it??? By mikey34 (Read 1,209 times)

[mikey34]

I am wondering if the 83cc BBK is worth the work? I currently have the 50cc QMB139(Wildfire WFH50-S2) and I either want to 150cc swap or slap a BBK on my 50. I can reach 45MPH on my 50 on flat ground, and there's a 65MPH highway by my house, so I would like to get it there.

If anybody hass done a BBK on my engine, Let me know some spex PLZ
thanks in advance!

[Alleyoop]

You will not get the 50 to 65mph if that is your goal, maybe close little over 50mph but not 60 or 65. A 150 stock usually run 50+ and you have to mod them to get them to do HIGH 50s or 60mph. If the highway is 65mph speed limit you know they are doing 70-75mph. If your going to be on that highway your best bet is a 250cc scoot.
Alleyoop

[mikey34]

Well the highway's speed limit is actually 55, but I wanted 10mph play room hahaha Thats a little bit of a bummer cause I don't think a 250cc will fit on my 50s frame. I think if I swap for a 150, and upgrade everything, number one I think Ill make a better wire harness and GROUND, better exhaust and intake, and jet, HOPEFULLY I can tap 60 or at least 55-58...

[mikey34]

Im thinking a 150CC engine and this Kit should do it, What do you think Alley?

www.ebay.com/itm/150-to-170cc-Scooter-big-bore-Kit-Head-Cam-GY6-Coil-DC-CDI-and-30mm-Carburetor-/121132828649?pt=Other_Vehicle_Parts&hash=item1c341447e9&vxp=mtr

[Alleyoop]

Yea that should do it, but it says a DC CDI, the stator in the 150 motor that your going to get make sure it has a AC setup because your current harness is setup for AC and not DC. So the CDI may not be useable. WHY NOT just buy a 150 scoot for the money your going to dish out for the motor and mods?
Alleyoop

[mikey34]

Very true, I guess it kinda feels like a pirate and his ship! hahaha
Do you know if the 150 will bolt up to the 50 frame? Its the QMB139 engine now and I'm guessing the short case 150 would be what I'm looking for...

There is a decent scooter shop in town too(Santa Rosa Beach, FL) called California Cycles. They're also prolly getting ready to get rid of this years scooters, bet I could get one for under 800...

[Alleyoop]

It may just bolt right up measure the mounts on your current motor and see if the 150s mounts have the same measurements. Also watch out for the 150s rear wheel shaft and if its a drum and or disc 150 setup. You need to know the length of the shaft that goes through your rear wheel and make sure the 150s shaft will fit your wheel. They are not plug and play swaps.
I think you will wind up spending more than if you bought a 150 on the cheap and modding that to go 60+. But you will have a bigger scoot and much safer at those speeds.
Alleyoop

[jct842]

A 150 will not bolt up to a 50 frame.

[mikey34]

So a 152QMI / 157QMJ WILL NOT Bolt up to a QMB139 Frame???

[mikey34]

Because if the picture of the 150cc IS a 150cc(152QMI / 157QMJ), it has all the right bolt holes. Going to get my measurements tomorrow for the shaft and mount to mount