help

I’ve read almost everything I can and still don’t get what it could be. Basically I put the whole kit together on my cruiser and it wouldn’t spark so I checked the cdi and magneto for continuity, magneto read 318 so good there but CDI seemed weird it wasn’t showing anything then it was etc. Got...

hi i bought this engine https://www.monsterscooterparts.com/mini-bike-parts/mini-bike-categories/engines-mini-bikes/49encowielst.html and was wondering what the best way to wire it was and what i should buy as i'm pretty new to building scooters and such and figured i would ask the pros lol

OK so my bike engine stalles out while riding from idel to accelerate but is random sometimes its fine? ( short burst stalls) Its 1 of these problems? Fuel system/carb I cleaned out my fuel tank and lines and carb already still stalls I have this carb with a #75 jet on it (it came with a #72 I...

Hello! My clutch slowly becomes tighter and tighter (meaning it is harder to disengage the clutch). Now I have to pull the lever all the way in because the engine is still engaged when I lock the clutch in. I know this is not caused by the cable since the clutch lever stays in the right range...

Just to give a little backstory, I had two previous kits (49 and a 66cc) and this was my first time mounting a kit to a suspension bike. I had purchased an 80cc /100cc engine with a high compression head. After mounting the engine and setting up the whole bike, I was relieved to see that my...

so I don't remember putting a second ball in and I've taken it apart to clean a phew times.. but I did buy it second hand. anyway my question is should I just leave it in? it's got a phew flat spots. and if I take it out the small bar doesn't stick out far enough.. I'm not sure what to do...

Hello, So I had just built a 49cc motorized bike about a week ago and was looking if it was legal to ride it on public road sidewalks, all I could find was that (electric bikes are legal if they are under 500w and do not exceed 32km/h). I have also came to these forums multiple times but...

I recently bought these wheels and someone on here told me I should go for disc brakes instead of rims brakes. I have a standard cruiser set up with this engine on it. Any advice from y'all would be great. Mainly trying to see what I'll need to buy to assemble it (i.e. the disc brake set, any...

Howdy, I'm building a hill climber, not a street racer or commuter. There are so many brands and merchants selling motor kits now that it's crazy. I'm looking for guidance/tips on which kit I should select on a budget ;). 56 to 60 tooth sprocket Hopefully sprocket adapter If it's bad, I will...

I recently have gotten intrested in 2 stroke bike motors and wanted to get one for my mountain bike. The frame was large enough and the tires were the right size, but I realized having a rear disc brake would be an issue. Is there anything I can do to get around this?? (Aside from taking out my...

Hey everybody, I'm a noob and I kinda don't know what the **** I'm doing.. I've watched a few tutorials as well as scrolling down a handful of threads on here, but I always seem to get confused because there's always a group of people saying one thing and then another group disagreeing saying...

My bt80 electric start will not engage to go forward i guess you can say it starts just wont go please help! Is it the clutch?

The engine kit I purchased, which I've ran on 2 bikes (Currently on my profile photo) It has the standard/older style fuel tank requiring the female style petcock. The original leaked and the seal became useless. I ordered another. I apply thread tape to the tank to help with a better seal...

got a brand new 2 stroke gas bicycle kit when i ride at a high rpm and pu the clutch in the rpms dont come down but if i engage the clutch a tiny bit it will bring it back down to normal idle speed and it idles just fine whats wrong someone help please

Hello! This is by first time on MotorBicycling.com! I live in Idaho and I am currently a Senior attending High School. For my senior project I made my first ever Motorized Bicycle! :) ( nothing special though, just a simple Chinese 2 stroke 49 cc engine. I figured I'd start out cheap with my...

Hello! This is by first time on MotorBicycling.com! I live in Idaho and I am currently a Senior attending High School. For my senior project I made my first ever Motorized Bicycle! :) ( nothing special though, just a simple Chinese 2 stroke 49 cc engine. I figured I'd start out cheap with my...

This is my first big build, I ended up getting the 212cc kit, and I need a good frame on a budget and im having issues finding one, ive checked my local shops and cant seem to find a frame to fit the motor. I'm new to a lot of this and dont have much money or income, I need a frame that can tide...

New to the forum. 3 builds under my belt so far. The age old question that I can NEVER sort out: How to get proper lighting on a bike? I'd rather skip buying endless amounts of batteries and buying lights that fail after a week or two. I HAVE found a 12v generator that installs next to the...

I have a huffy panama jack that I want to add a motor too, all i know about this stuff it that I want around a 50cc engine for my weight. Any advise that you all could offer would be fantastic. I would be riding on mostly flat terrain and I don't need anything that goes super fast. And something...

So I planned on whacking a 2 stroke engine kit from eBay onto a push bike and couldnt find any decent hybrid bikes in my area. I walked into a well known local bike shop and fell in love with one recommended by the owner - A Python Quantom 8000 Men's hybrid bike. I fell in love and purchased on...