How to check if your motor is a 49cc

[Dreamah]

Or you can Just measure the Bore... But For Guys who arnt Mechanicaly minded Rossi Racing's Help would do wonders.. good work nick

[gehenna]

thanks for the info!

pity mine is 40cc... so many bloody things wrong with it since i got it, i havent had a minute of joy yet... bah - i spose thats wot u get for buying a cag off ebay!

[Dutch]

i was just considering tonight to take off the head and measure the bore size, and was going to post about the size of bore (in another post i read something 44mm bore size = 49cc) is that right? then came across this post and saw the pic's and rushed out to see, but it's 10.15pm - tired and couldnt really see anything - so tomorrow i'll take of the plastics and have a look, but i bet ya its a 40cc

if its advertised as 49cc can i do anything?will they give my cash back or am i just totally rooted

[Rossi Racing]

yes i think 44mm bore = 49cc. im not sure if you can do anything about it. heaps of people have benn ripped off.

[Dutch]

thanx rossi

hmm i've heard they are hard to get a hold of as well !!!!!!

[Rossi Racing]

no worries. yea they are lol

[KOOKY]

Just because the motor is fitted with a 44mm bore does not make it 49cc.
Most of the bikes that come withh the big bore are 50.197 cc. the formla for this is for volume of a cylinder You need to input the radius and the stroke.
22/7x r x r x s. the decimal point will not be in the right place but if you have a idea of what it is close to youll know. or
http://www.1728.com/diam.htm
Master this fomula and you won`t get ripped by peoples false claims.

[00RVR]

Dont dispare you guys with 39/40cc CAG engines, its easy to make then fly.
Ive done 25+ engines with simiar boost ports, and found the 39/40cc responded as good and in most case better than the 49/50cc.
They rev smoother, and in 90% of cases rev higher, and you dont have half as much the vibration of the 49/50cc engines.
And in my books are the most underated engine out there.
If you want your 39/40cc to go better PM me.

[Dreamah]

Yea i love my BZM 40, not just kos of our small SA track i find it smoother to ride, and power just rolls on...

[Luke2605]

I just looked and mine is a 40cc......and i got it from Pooraka race track too. Any way goes well and i can do some mods to it to make it faster