Hi everybody, How can you tell from just looking at the motor if it's 49cc or 80cc. I bought a gas bike at a garage sale for 75.00 bucks. Thanks for the help !
49cc or 80cc ?
- Thread starter Hot Wheels
- Start date
The 49cc has a round head and the 80cc has a square head. OK,I was wrong but it is 1 thing to go buy.
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I found the 50cc has 6mm head barrel bolts and 70cc has 7-8 mm bolts but it could be differant on different makes thanks mick29
Not all the 50's have round heads. I have two 50's, a "65cc" and a couple of 70's here, and none are the same. One 50 has 8mm studs, the one 70 has 6mm studs.
The only way to tell is to measure the bore and stroke.
The only way to tell is to measure the bore and stroke.
On that note. All 3 50cc barrels (all 40mm bore) i have are 57mm square.Head nut size is not a reliable way to tell. Not necessary to take it apart. Diameter of cylinder between the fins works every time. Obvious once you think about it.
Hot Wheels if your barrel measures more it aint a 50ish
If you can tell the difference by looking at my engines which is a 50 and which is a 66cc by the size of the head, I will give you both of them.
I have a 49cc and also another bike with the 80cc right next to each other, the difference was pretty obvious. Maybe your engine are the same.
