I started this morning getting the brake hooked up. Then it was on to the throttle. I purchased a used correct mini bike throttle so I need to get that installed. I removed the old throttle and created a template for the new mounting bracket.
Then drilled the new holes and welded up the old holes.
I installed all the brackets and created new linkages. Coat hanger works great for making linkages. I had to open up some of the holes a tiny bit for the rod to fit but it's stiff enough and bend to the shape you need. Can someone who has a stock H50 with this throttle setup tell me how long these to linkages are?
I just guessed on length when I made them and I'm not able to get the throttle to open very far. If someone could provide those dimensions it might save me a lot of trial and error.
Assembled
[video]https://youtu.be/48ApooeHb6g[/video]
My biggest issue right now is the throttle. My "fixed" original throttle isn't going to cut it. It's not near smooth enough in operation so I'm going to have to buy a new one. As stated above I'm not sure my linkage lengths are correct so that's not helping my throttle issue.
I'm also having problems with the 20 series. It won't sit and idle. The belt I have says 8 3/16-8 1/4" spacing between the center of the crankshaft and the center of the jackshaft. I've got the engine almost back to 8 1/8" and the belt is still catching at idle. I don't know if it's because my driver is old and still needs cleaned up, if my idle is too high or if I need to move the engine back farther.
Other than that the only other issue is the fuel petcock leaks when open. I tested it closed to make sure the tank didn't leak but I'll have to replace that because it leaks pretty good. I rode it around my parking lot at work. I'll try and get my wife to take a video tomorrow. To get much speed I have to work the throttle with my hand down between the frame with makes driving a bit tough.