Genuine Roughhouse 50 rebuilt
Sept 6, 2022 19:53:48 GMT -5
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Post by therealslimshaggy on Sept 6, 2022 19:53:48 GMT -5
Just wanted to post some details on my experience rebuilding the top end of the genuine roughhouse 50. I searched high and low all over the net and got little pieces of info here and there but nothing substantial or confidence inspiring to a person trying to do their first rebuild so I thought I would share my experience here for others who might be searching this info.
To start I searched on here and mostly found aftermarket builds and those had some info missing with a lot of detail on the engine build but no detail or pics on charging the rear gears to make it work. So I decided to go oem top end kit I got from power sports in Arizona online. I only go to them now for oem parts as I have bought from other online sites advertising oem roughhouse belts only to be sold soft rubber mitsuboshi belts that heat up and snap after 500 miles. They even say automotive belt on them. It’s sad these are being sold as roughhouse oem belts. They aren’t. Roughhouse oem belts are bando brand and come in pgo wrapping. If you got a mitsuboshi belt throw it away. It’s not oem. It’s trash. It’s an automotive belt. I snapped 3 on a stock roughhouse in less than 5 days. Put back on my old used 10000 mile bando belt and guess what. It lasted 3 weeks until I get a new bando that I could replace it with. And yes the mitsuboshi were the correct same size but not made for scooters. Made for automobiles.
Anyway moving on to my oem top end. I found a guy that likes to late and giggle and sound like a lunatic on YouTube who also has a roughhouse 50 rebuilt video. He left out a ton of info. You know the part he says the wrist pin bearing fell out like dominos. They he says he fixed it and got it back together. Well. He didn’t fix it. He just put in a new wrist pin bushing/bearing. What happens is the wear and tear on the old one makes it lose and so they fall out. Your new one in the kit is tight. So if your worried about those falling out during reassembly don’t, the new ones tight. They don’t fall out new. Next the c clips. The guy in YT called them g unit clips and made jokes. Maybe he bought aftermarket clips. The clips that come with the kit are c clips. No g clips. This is the most difficult part of the build. When you get them in if they oval you can use needle noose in the opposite way to bend them a little back to a more C shape after they are in there. Or source g clips somewhere and hope they fit. The only thing I had in common with dude in yt vid is both our pistons shattered. Just a heads up 15-20k miles is about when an oem roughhouse piston shatters. The cylinder was tight. It makes me rethink what’s the point in changing air filter and using quality two stroke oil if you have to rebuild every 15-20k and after that time turns out cylinder had no wear or tear Might as well run the cheap stuff and only replace air filter after top end rebuild since your doing a new cylinder with the top end rebuild.
I did the rebuild with engine mounted to frame and plastics removed. 3000 miles in no issues still going strong. My next adventure will be how long the bottom end and rear gears can last. I have no idea. But I’m doing 40,000 miles a year as I use it to deliver food with. I don’t want to do a bottom end rebuild so might consider swapping in an engine at that point. Just my experience feel free to add thanks for reading.
To start I searched on here and mostly found aftermarket builds and those had some info missing with a lot of detail on the engine build but no detail or pics on charging the rear gears to make it work. So I decided to go oem top end kit I got from power sports in Arizona online. I only go to them now for oem parts as I have bought from other online sites advertising oem roughhouse belts only to be sold soft rubber mitsuboshi belts that heat up and snap after 500 miles. They even say automotive belt on them. It’s sad these are being sold as roughhouse oem belts. They aren’t. Roughhouse oem belts are bando brand and come in pgo wrapping. If you got a mitsuboshi belt throw it away. It’s not oem. It’s trash. It’s an automotive belt. I snapped 3 on a stock roughhouse in less than 5 days. Put back on my old used 10000 mile bando belt and guess what. It lasted 3 weeks until I get a new bando that I could replace it with. And yes the mitsuboshi were the correct same size but not made for scooters. Made for automobiles.
Anyway moving on to my oem top end. I found a guy that likes to late and giggle and sound like a lunatic on YouTube who also has a roughhouse 50 rebuilt video. He left out a ton of info. You know the part he says the wrist pin bearing fell out like dominos. They he says he fixed it and got it back together. Well. He didn’t fix it. He just put in a new wrist pin bushing/bearing. What happens is the wear and tear on the old one makes it lose and so they fall out. Your new one in the kit is tight. So if your worried about those falling out during reassembly don’t, the new ones tight. They don’t fall out new. Next the c clips. The guy in YT called them g unit clips and made jokes. Maybe he bought aftermarket clips. The clips that come with the kit are c clips. No g clips. This is the most difficult part of the build. When you get them in if they oval you can use needle noose in the opposite way to bend them a little back to a more C shape after they are in there. Or source g clips somewhere and hope they fit. The only thing I had in common with dude in yt vid is both our pistons shattered. Just a heads up 15-20k miles is about when an oem roughhouse piston shatters. The cylinder was tight. It makes me rethink what’s the point in changing air filter and using quality two stroke oil if you have to rebuild every 15-20k and after that time turns out cylinder had no wear or tear Might as well run the cheap stuff and only replace air filter after top end rebuild since your doing a new cylinder with the top end rebuild.
I did the rebuild with engine mounted to frame and plastics removed. 3000 miles in no issues still going strong. My next adventure will be how long the bottom end and rear gears can last. I have no idea. But I’m doing 40,000 miles a year as I use it to deliver food with. I don’t want to do a bottom end rebuild so might consider swapping in an engine at that point. Just my experience feel free to add thanks for reading.
