I recently rebuilt the HS40 on my 70 Rupp Roadster (http://www.oldminibikes.com/forum/O...oys-1970-rupp-roadster-jff-15.html#post948556). For some reason, I didn't test fire it before it was all pretty'd up because I checked the timing and everything else twice. I'm hoping the issue I'm having is just a carb issue
I finally put gas an oil in it today and pulled it a few times and it didn't sound like it was doing anything. After a few more pulls it popped. I opened the choke about half way and pulled and it fired -- and it sounded like it was at full rev. After talking to buckeye a few weeks back I was prepared and pulled the spark plug wire off the engine. The throttle was stuck about half way open. I closed it up and fixed the culprit.
I half way expected it to start right up on the next pull but it didn't. After about another 20 pulls it fired up but was running sloppy. I tried fiddling with the air mixture screw and gas valve, but that didn't seem to help at all. Does anyone have any recommendations? When I installed the carb, I screwed both all the way in and unscrewed them 1.5 turns each. My elevation here is about 1700-1800 feet if that makes a difference.
Any help would be appreciated. I'm not really an engine guy, but for the sake of saving money, I'm trying to learn!
I finally put gas an oil in it today and pulled it a few times and it didn't sound like it was doing anything. After a few more pulls it popped. I opened the choke about half way and pulled and it fired -- and it sounded like it was at full rev. After talking to buckeye a few weeks back I was prepared and pulled the spark plug wire off the engine. The throttle was stuck about half way open. I closed it up and fixed the culprit.
I half way expected it to start right up on the next pull but it didn't. After about another 20 pulls it fired up but was running sloppy. I tried fiddling with the air mixture screw and gas valve, but that didn't seem to help at all. Does anyone have any recommendations? When I installed the carb, I screwed both all the way in and unscrewed them 1.5 turns each. My elevation here is about 1700-1800 feet if that makes a difference.
Any help would be appreciated. I'm not really an engine guy, but for the sake of saving money, I'm trying to learn!