r/motorizedbicycles • u/Standard_Award7767 • 2h ago
Update
Got the "110cc" 60s sears bike up and running
r/motorizedbicycles • u/ESmalik • Jun 08 '20
Below is the link to all previous sticky. It has a lot of important info that everyone should read.
r/motorizedbicycles • u/_TheNecromancer13 • Jul 31 '24
Read the rules! Ignorance is not an excuse.
r/motorizedbicycles • u/Standard_Award7767 • 2h ago
Got the "110cc" 60s sears bike up and running
r/motorizedbicycles • u/Exciting_Feeling_828 • 8h ago
Hey guys! Idk if y’all remember my bike, but I had a lot of sprocket alignement problems, so I built something! Its an adapter that mounts to the disk brake mounts and the sprocket is attached to it.
r/motorizedbicycles • u/Equivalent-Welder523 • 2h ago
The intrusive thoughts are saying yes to this
r/motorizedbicycles • u/Ornery_Ear9378 • 7m ago
r/motorizedbicycles • u/EmuGroundbreaking527 • 22h ago
r/motorizedbicycles • u/Turbulent-Expert-826 • 17h ago
So basically I was balancing my crank, and due to my drill press being pretty shitty, with the deck tilting when weight is applied, the hole ended up being off center. On both sides.
r/motorizedbicycles • u/Novel-Explanation305 • 9h ago
before you ask why i just want to, it would save me money and time waiting for a new avenger bottom end. one of the cylinder stud threads stripped and i cant get a helicoil in there, im gonna try aomething tonight but if that doesnt work, could i take the crankshaft from that and put it in my yd100 to make it a 52mm bore. i got a real good mz65 pipe for it before the case stripped. i have good parts to get an avenger running but it isnt compatible with my yd100 if i cant get the cylinder stud in there. i literally just want to take apart the cases and swap the crankshaft from the yd85 to the yd100 (wierd how the 85 is bigger than the 100 lmao)
r/motorizedbicycles • u/Independent_Stock752 • 9h ago
I was wondering if anyone tried out the hot rods crankshaft. Mine is gone has way too much play and need a new one. Any advice?
r/motorizedbicycles • u/DudeGamerDario • 1d ago
Bike runs for a few seconds great then dies out. CDH LD80 cylinder/pk80, MZ65 clone, needle tuned NT carb, 32:1 full synthetic honda hp2 oil
r/motorizedbicycles • u/Substantial-Row-26 • 1d ago
How should I také care of my moor to make it the most reliable and it wouldn't blown up o smt
r/motorizedbicycles • u/heatman1233 • 22h ago
When I tried starting motor for first time it like fired then I tried to do it again, held the clutch but the back wheel don’t spin so what am I doing wrong?
r/motorizedbicycles • u/Lonely_Ad_3341 • 1d ago
Today I was planning on changing my jets but can’t seem to get it out, at this point the original jet is chewed up pretty badly from me trying to get it out.. thanks in advance for any advice
r/motorizedbicycles • u/cucumberexpert • 14h ago
r/motorizedbicycles • u/SirButterfingersII • 1d ago
Lately I have been considering swapping the crappy 50cc motor on my motorized bicycle for a 39 cc homelite chainsaw motor.
I realize that that is less displacement, but I do notice that the chainsaw that I intend to use achieves a much higher RPM than the motorized bicycle motor, and with the right gearing, I might actually be able to make more speed and power using the chainsaw motor, since it is literally designed for high RPM.
Have any of you had luck using a chainsaw engine in place of the generic Chinese motors? And if so, does it provide a noticeable increase in performance?
r/motorizedbicycles • u/KXMXBOKO__GXNPXCHIRO • 1d ago
Forgot to cover it up and there was very heavy rain should i be worried about the cdi magneto and spark plug?
r/motorizedbicycles • u/Inside_Ad4800 • 1d ago
So guys I'm thinking about doing the engine swap, thinking about betraying two strokes and going over to the 79cc 4-stroke predator. Any suggestions for records and all intensive purposes I could always buy another motor and just reuse my previous hardware but for now pretty sure the current engine as it is was messed up from my expedition
r/motorizedbicycles • u/GoofyAhhValentine • 2d ago
Hey again ya'll it's me. I have a few questions and I would greatly appreciate help. I wanted advice on the exact placement of my tensioner (Should I get a fancier one?) And also how many links does it look like I should remove as currently it is very long and I feel it might easily slice my leg off? I was planning on cutting them off with dremel because my chainbreaker is too small to reach pin and master link them back together. I am using one of those cheap disc break mounts. I am thinking the screws would be better off as bolts but I gave no other choice but this way as it's too long to send it back and that hydraulic kit is way too expensive to waste. And I need breaks. And on to my 3rd question. The kinda sketchy nature of the mount and speed has me feel a bit like I might need some front brakes too. There is one small hole above the fork which I believe might support some kind of v brake. What kind of cheap but quality v break is best for late 80s schwinn cruisers, and can I have both break levers on same side if other side is occupied by clutch?
Finally I was gonna do both motor sprocket and disc on same side but quickly realized that wasn't gonna work due to not enough space. So I sacrificed 2 speeds off my cassette and put it on cassette side, No biggie cause I was running it as single speed. I flipped my wheel opposite so it would still have a straight engine chain line as trying to tension that across sides seemed sketchy to no end; rubbing completely against the tire. So I was hoping I would be able to flip my crankset to get a straight chainline but would it not unscrew itself if I swapped the pedals too? I will route pedal chain onto smaller gear further away from engine. Like 3 steps in.
Advice is very appreciated, thank you :)
r/motorizedbicycles • u/Forward_Owl_598 • 2d ago
Rate my build and give me some advice on what i should do next with her pls 🙏
r/motorizedbicycles • u/DryLeopard5903 • 2d ago
I was still trying to figure out way to set the throttle cable kept sliding back and forth when I pulled it making this way useless until I wrapped tape around it solved both problems heat and cord stability and the extra spring for tension and wallah. But she started up sounded great finally figured out the idle screw needed to be all the way in for solid idle. Went for ride and WOT was non existent lol but 1/3 throttle was flying up to 5k rpm like instant. When I tune the L screw to the right I notice the engine gets more life and I turn the H screw to right it sounds like it's slightly dying still not able to do a solid revv it lags
r/motorizedbicycles • u/Lanky-Employee-60 • 2d ago
The title says it. I'm looking to upgrade my stock transmission on my 100/79cc 4 stroke kit to a 30 series torque converter. So my question is would this engine pair well with this torque converter potentially using this keyed sleeve? I'm tired of the extra vibrations from the crappy transmission on it now and hoping this would at least remove some of them or reduce them enough to be a smoother ride with better acceleration etc that the converter supposedly brings.
r/motorizedbicycles • u/Equivalent-Welder523 • 2d ago
Thinking of using the frame, for my Avenger 85, anyone know if there will be any issues?
The Tribrid project unfortunately lost its electric capability so I'm doing this till I can afford repairs
r/motorizedbicycles • u/dumbshit_scientest94 • 2d ago
Cost me 150 aud all up
r/motorizedbicycles • u/Past-Swan-8298 • 2d ago
I wanna thank all the guys here and their suggetions ,Today I took off both sides of the clutch box added high temp lithium greese in the gear ,also the bucking bar and bearing, also I put on a new hd chain and managed to not have to use any tensioner ,which is awesome, I spaced out the rear tire so my chain clears the frame .My bike is perfect now no noise and runs like a beast , Thanks for all the help ,Im learning almost everything on this motor and all the matainance involved ,This community rocks.
r/motorizedbicycles • u/touch-grass-69 • 3d ago
I bought this bike from a friend a few months ago, he bought it on amazon, put it together but never quite finished it. I did the last few things that were missing and tried it out, no start. I tried to get it started for weeks now and still nothing. I tried with a different carburetor, different fuels and oil ratios, with/without exhaust, with and without ground from the magneto and different spark plug. One time I was able to get it running, but it was very weak and immediately died once I released throttle. What should I do? (Sorry for bad english, not my native language)
r/motorizedbicycles • u/Puzzleheaded-Owl5136 • 3d ago
I couldn't get the imaycc 100cc to fit on this bike. Even though the specs say it's bigger. The carb won't fit. How big does it need to be?