I might try the hard tire top speed challenge im part of the gopednation group on FB and my original sport i rebuild has been clocked at 35 on hard tires without beadlock rims lol
@@aaronpratt89 u able to give me tips to tune my carb on mine im still not getting my full potential from my ped.....my fb is the same as my name on here and I'm in KY
What size spindle is on the sport? It sounds like you have hit a road block for more rpm, it could be an air flow issue or it could be that the gearing is too tall and the motor doesnt make enough power to overcome the load. You should try to eliminate the base gasket to gain more compression and then raise the exhaust port atleast what ever thickness the base gasket was and that should help with a few more RPM up top. Also your pipe may not work at or above the rpm your shooting for so you may want to look out for and try another pipe like a jetpro or factory pipe or one of the others. Also I had the exact same setup as your bigfoot there and I can tell you that the pipe on it does not work that well on an LH. Mine had a stock lh, 800 spindle and jetpro pipe and it was very slow and had 1 mediocre powerband. So I got fed up with it and built an lh/rc hybrid engine that is around 30cc and now the engine screams and the pipe comes on In 3 different powerband stages and you can hear the pipe change sounds, it's pretty neat. The lh engines always leave you wanting more and these days the rc style engines are so cheap that's the lh stuff isn't even worth messing with anymore.
I totally agree with you. The sport is on a .750 spindle. The engine is bone stock. The only thing it has is a 668 carb and a series 1 exhaust. This engine is strange because it uses CDI ignition unlike traditional rc style engines. So the torque curve is much lower. And getting that engine to make more top end power will most likely come down to porting at this point. The big foot running the stock LH is just a turd. The LH engines do not have enough transfer to support great top end power. I would love to put a different pipe on the big foot but finding one is like pulling teeth. I do plan on porting the LH. The long block is stock. If you watch my other videos I do some minor modifications. That big foot also needs a smaller spindle lol the 800 is way too much for it.
@@aaronpratt89 yeah the boat style zenoah engines really like port work to rev out. Back in the day there was a guy named tony castronovo from warehouse hobbies that used to make videos about porting and modifying the PUM series zenoahs and he talked about when they would turn super high rpm for extended periods of time that the piston would actually swell and try to seize on the exhaust side of the piston and to counteract that they would put the piston in a lathe and actually machine down the whole exhaust side of the piston a couple of thousands of an inch for extra bore clearance. The exhaust port will probally be where most of your gains will be for that topend performance also taking the base gasket out will help raise the compression but will loose exhaust and intake port timing a bit or if your willing to sacrifice compression for more port timing you can run a really thick copper base gasket which will raise all the ports so it's a trade off. That's the fun thing about these engines is that they respond to tiny changes and are fairly cheap and easy to modify.
I might try the hard tire top speed challenge im part of the gopednation group on FB and my original sport i rebuild has been clocked at 35 on hard tires without beadlock rims lol
The top speed challenge was in the group called hard tire kings. It ended April first. The winner reached 45 mph.
@@aaronpratt89 dang
@@johngrove2035 yea he was fast!! They uploaded the videos to UA-cam.
@@aaronpratt89 u able to give me tips to tune my carb on mine im still not getting my full potential from my ped.....my fb is the same as my name on here and I'm in KY
@@johngrove2035 yea I need to drop a video of how I tune carbs. I’ll make one soon!
What size spindle is on the sport? It sounds like you have hit a road block for more rpm, it could be an air flow issue or it could be that the gearing is too tall and the motor doesnt make enough power to overcome the load. You should try to eliminate the base gasket to gain more compression and then raise the exhaust port atleast what ever thickness the base gasket was and that should help with a few more RPM up top. Also your pipe may not work at or above the rpm your shooting for so you may want to look out for and try another pipe like a jetpro or factory pipe or one of the others. Also I had the exact same setup as your bigfoot there and I can tell you that the pipe on it does not work that well on an LH. Mine had a stock lh, 800 spindle and jetpro pipe and it was very slow and had 1 mediocre powerband. So I got fed up with it and built an lh/rc hybrid engine that is around 30cc and now the engine screams and the pipe comes on In 3 different powerband stages and you can hear the pipe change sounds, it's pretty neat. The lh engines always leave you wanting more and these days the rc style engines are so cheap that's the lh stuff isn't even worth messing with anymore.
I totally agree with you. The sport is on a .750 spindle. The engine is bone stock. The only thing it has is a 668 carb and a series 1 exhaust. This engine is strange because it uses CDI ignition unlike traditional rc style engines. So the torque curve is much lower. And getting that engine to make more top end power will most likely come down to porting at this point.
The big foot running the stock LH is just a turd. The LH engines do not have enough transfer to support great top end power. I would love to put a different pipe on the big foot but finding one is like pulling teeth. I do plan on porting the LH. The long block is stock. If you watch my other videos I do some minor modifications. That big foot also needs a smaller spindle lol the 800 is way too much for it.
@@aaronpratt89 yeah the boat style zenoah engines really like port work to rev out. Back in the day there was a guy named tony castronovo from warehouse hobbies that used to make videos about porting and modifying the PUM series zenoahs and he talked about when they would turn super high rpm for extended periods of time that the piston would actually swell and try to seize on the exhaust side of the piston and to counteract that they would put the piston in a lathe and actually machine down the whole exhaust side of the piston a couple of thousands of an inch for extra bore clearance. The exhaust port will probally be where most of your gains will be for that topend performance also taking the base gasket out will help raise the compression but will loose exhaust and intake port timing a bit or if your willing to sacrifice compression for more port timing you can run a really thick copper base gasket which will raise all the ports so it's a trade off. That's the fun thing about these engines is that they respond to tiny changes and are fairly cheap and easy to modify.
Nice vid! What’s the fastest you’ve done on a goped?
When I was younger and working at a power sports shop. We built a gsr40 it took us to 47mph. That’s the fastest I have been on a Goped.
@@aaronpratt89 damn that’s fast! Doesn’t it become harder to ride the faster you go considering how small the wheels are?
@@einhundertfunfzig4919 yes on the hard tire scooters it is super sketchy over 30 mph.
Any air tire scooter is super stable above 30 but below 50 lol
@@aaronpratt89 I really find it incredible how much power you can get from those small engines!
@@einhundertfunfzig4919 if it wasn’t for the pipes, they would be useless lol
What’s the engine temps like
That thing looks wicked fast what’s the top speed?
Watch the video lol. I show the top speeds
It’s faster in y other videos. But a new larger rear tire slowed me down lol