Post by lauderdaleboats on Mar 31, 2011 21:01:46 GMT -5
Ok, bought a Baccio 50 Runner about a month ago. Plan is to carry it on the raceboat trailer and use it as a runner when at race sites. Rode it back & forth between my shop and home a couple of times in the 50cc form. I live in Fort Lauderdale, and if you all are not aware, speeding is the norm. I travelled a three lane highway on this bad boy. Scoot was capable of 45MPH and the main road was a 45MPH speed limit. OK, I thought all was well. First ride I was doing 45, city bus was climbing up my anus and eventually overtook. Watching that bus wheel spin 6 inches away from me was not a good feeling. Everything else flew by. Planned on doing a build on this anyway so a Scrappy 100 was ordered immediately for a starting base. New motor arrived and was tore down right away, measured and checked over. Decided to put it back together and bolt it on to do a comparison of both in stock form. The Scrappy 100 (91cc- 52mm bore X 43mm Stroke) came with a shorter belt. It is stamped 796 but was actually shorter than the 788 on the 50cc. It had extremely sluggish takeoff. I swapped out belts and it helped a bit but still a dog. I milled and added a washer in the variator and woke it right up. Then replaced the 6 gram rollers with 4 gram and it took off pretty strong. The chinese carb that came on the 100 was a replica of the stock Mikuni on the 50cc. Also had to change intake manifolds as my scoot has the rear facing style. Bike ran a solid 52MPH at 6500 to 6800 RPM. Cut the stock exhaust in half and removed some 'stuff' and weled it back together. No change in running, just louder. Gearing is pretty tall in the 100. Approx 10.1:1 compared to the screaming 13.5ish :1 on the 50. Scoot is now safer on the shop to home commute. Yesterday I got smoked by a 100CC four stroke that looked like it was falling apart. I was not happy.
I had already fabricated a new rear facing intake manifold for the upcoming build. It's 26mm ID alum tube with 35mm O.D which I bent and tigged to a fabricated plate to bolt to the reed cage. ( I should build and sell these, pretty trick piece). Today I installed that manifold, after opening up the reed cage. Ran up the street to the scooter store ( there are about four within 1 1/2 miles of the shop) and picked up a new OKO 26 mm D slide carb. The coupler that came with the carb fit the intake a little tight but right. I thought that was a bit to easy. Cut and re-threaded the 90 degree throttle cable piece from the top of one of the stock carbs and fit perfect after a small bit of adjustment. Checked for full slide movement and all was well. Hooked up the fuel supply line and the petcock vacuum hose to what I thought was the vacuum fitting on the carb. Scoot would not start. I sucked on the petcock vacuum hit the starter and it fired right up, till the bowl emptied.
Carb back off for examination. Could not find a vacuum anywhere on the carb. Carb wasn't even 1/2 hour old and it was bolted in the mill. Drilled and tapped a hole just in front of the slide and installed a fitting. While it was sitting in the mill, I thought why not add a fitting for the oil injection. Flipped it over and drilled a hole for a pressfit of the brass oil fitting from the chinese stock carb. As I was re-installing the carb I thought that this carb better work cause I doubt there would be any refunds or exchanges at this point.
Bolted up the carb, installed a unifilter and cranked it over. Started right up. Now this 26mm carb comes stock with a 125 Main and 60 pilot so it was quite a bit rich. Took it for a spin and it ran 56. Takeoff through to about 30MPH was pretty much the same as the stock carb but after that it pulled alot harder, right to 7500RPM.
Because of the whooping I took putting my customers jobs on hold I decided to pull the top end. Raised the exhaust 1.5 mm and widened it from 34 mm to 37mm Iknow this is a bit wide without a bridge but it's getting replaced anyway. I had the itch. Opened up the transfers from the bottom a bit and re-installed. Took it for a couple of 1 mile runs and got it to 57MPH. Decided to ride it home. Saw 58.5 on the GPS with a tailwind. Made a detour to the scooter shop and ordered a Yasuni R.
I wanted to see what this scoot would do with a quick port job and a bit of tinkering. When the pipe arrives I'll install it and rejet. After that the 'BIG" build will begin. I'll start posting some pics soon to follow the build.
I had already fabricated a new rear facing intake manifold for the upcoming build. It's 26mm ID alum tube with 35mm O.D which I bent and tigged to a fabricated plate to bolt to the reed cage. ( I should build and sell these, pretty trick piece). Today I installed that manifold, after opening up the reed cage. Ran up the street to the scooter store ( there are about four within 1 1/2 miles of the shop) and picked up a new OKO 26 mm D slide carb. The coupler that came with the carb fit the intake a little tight but right. I thought that was a bit to easy. Cut and re-threaded the 90 degree throttle cable piece from the top of one of the stock carbs and fit perfect after a small bit of adjustment. Checked for full slide movement and all was well. Hooked up the fuel supply line and the petcock vacuum hose to what I thought was the vacuum fitting on the carb. Scoot would not start. I sucked on the petcock vacuum hit the starter and it fired right up, till the bowl emptied.
Carb back off for examination. Could not find a vacuum anywhere on the carb. Carb wasn't even 1/2 hour old and it was bolted in the mill. Drilled and tapped a hole just in front of the slide and installed a fitting. While it was sitting in the mill, I thought why not add a fitting for the oil injection. Flipped it over and drilled a hole for a pressfit of the brass oil fitting from the chinese stock carb. As I was re-installing the carb I thought that this carb better work cause I doubt there would be any refunds or exchanges at this point.
Bolted up the carb, installed a unifilter and cranked it over. Started right up. Now this 26mm carb comes stock with a 125 Main and 60 pilot so it was quite a bit rich. Took it for a spin and it ran 56. Takeoff through to about 30MPH was pretty much the same as the stock carb but after that it pulled alot harder, right to 7500RPM.
Because of the whooping I took putting my customers jobs on hold I decided to pull the top end. Raised the exhaust 1.5 mm and widened it from 34 mm to 37mm Iknow this is a bit wide without a bridge but it's getting replaced anyway. I had the itch. Opened up the transfers from the bottom a bit and re-installed. Took it for a couple of 1 mile runs and got it to 57MPH. Decided to ride it home. Saw 58.5 on the GPS with a tailwind. Made a detour to the scooter shop and ordered a Yasuni R.
I wanted to see what this scoot would do with a quick port job and a bit of tinkering. When the pipe arrives I'll install it and rejet. After that the 'BIG" build will begin. I'll start posting some pics soon to follow the build.
very detailed. I'm going to enjoy following this build.. :thumb: 
