I finally managed to scrounge up most of my parts to get started. After trying to get a hold of several gas trimmer engines, a chainsaw engine, and a used pocket bike engine, I got a "new" 49cc cag style pocket bike engine. For whatever reason i went with a GEBE kit. Right now i have it all mounted up and the throttle plumbed with a spare brake lever.
I'm waiting on my gas tank and exhaust to arrive before I can fire it up. I'm also going to get a small toggle kill switch and drill a hole in the pull start housing to mount it.
The engine seemed to be quite a bit lighter than the trimmer engine, but that is before the exhaust is added.
As I noted in the new members area, the bike is a Mongoose XR-75. I finally gave it some love with new aluminum linear pull brakes, a new chain, lots of grease and a new shock spring.
Some things I'm noting is that with the current spring it squats quite a bit when I sit on it. I have a longer spring that is the same tension as my current short one. I was hoping to have a bit more suspension travel for the higher speeds.
The GEBE may not have been the best choice for the higher powered engine, but I got the stronger mount for the Tanaka 40cc engine. I'll just have to take it easy at first so i don't slip the belt. What fun would this be if i didn't have to tinker with it? I may end up having to detune it a bit to keep it quiet anyways, so starting with more power might be beneficial.
I was wondering what most people use for their control setup. I'm a motorcycle guy, but what I have on it seems goofy but usable. I have my front brake on the right, the rear brake on the left, and the throttle "backwards" on the left. My front derailer is toast, so that grip shifter is gone for that. I flipped the engine and carb around so the pullstart can be pulled from the seat.
On a side note.... flipping the engine also put the intake on the front and the exhaust up and rear..... it should be fun getting the exhaust routed with the port pointing straight up.
I'll post some pics here in a little bit once i get a chance to organize and upload them.
I'm waiting on my gas tank and exhaust to arrive before I can fire it up. I'm also going to get a small toggle kill switch and drill a hole in the pull start housing to mount it.
The engine seemed to be quite a bit lighter than the trimmer engine, but that is before the exhaust is added.
As I noted in the new members area, the bike is a Mongoose XR-75. I finally gave it some love with new aluminum linear pull brakes, a new chain, lots of grease and a new shock spring.
Some things I'm noting is that with the current spring it squats quite a bit when I sit on it. I have a longer spring that is the same tension as my current short one. I was hoping to have a bit more suspension travel for the higher speeds.
The GEBE may not have been the best choice for the higher powered engine, but I got the stronger mount for the Tanaka 40cc engine. I'll just have to take it easy at first so i don't slip the belt. What fun would this be if i didn't have to tinker with it? I may end up having to detune it a bit to keep it quiet anyways, so starting with more power might be beneficial.
I was wondering what most people use for their control setup. I'm a motorcycle guy, but what I have on it seems goofy but usable. I have my front brake on the right, the rear brake on the left, and the throttle "backwards" on the left. My front derailer is toast, so that grip shifter is gone for that. I flipped the engine and carb around so the pullstart can be pulled from the seat.
On a side note.... flipping the engine also put the intake on the front and the exhaust up and rear..... it should be fun getting the exhaust routed with the port pointing straight up.
I'll post some pics here in a little bit once i get a chance to organize and upload them.