HELP with HF 212cc project
- Thread starter hobojoe007
- Start date
is it really that big of a difference because the racing bike above the frame does not look like its alot beefier
im not planning it on being a commuter or anything but where i live there are alot of secluded side streets and i just wanted to see if i could do it
212cc no, 99cc perhaps.OK, you weren't talking to me, you just don't know how to use the quote button
212 cc in this bike???
No worries Aleman. Things probably got a little heated up from the 4-stroke commuter thread & carried to this one 
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in this picture above, is there anything holding the centrifugal clutch onto the shaft besides a key? is there any additional equipment or washers to ensure the clutch does not come off?If you had of made one of the races you would have seen
AirEds $500 212 cc racer that uses the SBP jackshaft.
It's a little hard to see in the first pic but that is a SBP
jackshaft and yes that is a snake on the left side of the
2nd pic.
It seems to be hanging in there just fine and I personally
have ridden it around Grange at least 30 laps at a pretty
good clip.
also, there was a tube coming out of the cover that covers the rocker arms on the motor, does that need to stay in place? there is also some sort of moisture trap or something that attaches to the intake and the top of the gas tank do i need to keep these items in place? or can i do without them?
on this: http://www.affordablegokarts.com/GearCalc.php calculator i have imputed the following numbers: 10, 17, 9, 41 the result is 7.744 is that ideal?
really you should run around the 9.5 to 10 ratio......it will still get you around or above that 40MPH mark you spoke of......running below that will tax your build parts to failure. Pulleys, clutch, most importantly if your ragging it.... your rear wheel spokes.
once again I will say it.....get a quality steel bike frame to do this with and maybe start off with a 99cc motor to do your learning with
if i go above 10 is that good? im trying to gear it so that i dont have to pedal it up to speed, i can just start from a standstill
i am going to get a beefier frame, in the meantime im trying to figure out everything else. this isnt my first build though so i have some idea
now we have to know your weight, do you live in hills, etc.....the higher you go on your ratio the slower your top speed will be but you will have plenty of torque potentially to motor up anything with as much weight as you like
also on this site: http://thatsdax.com/ the 4 stroke gear box package deal looks like it would suit all of my needs and eliminate the need to buy a bunch of parts separately, would it work on the 212cc? do you know? i should probably just call the guy, and with the 72 tooth i would achieve a 13.6 ratio
alright now the nitty gritty.....to be honest with you, to get the hill aspect done DO NOT go below 10.5.....at that ratio you will also hit 40MPH at 5500 RPM.....that RPM should be attainable if you do your research here on this site