I've moved onto custom designed/build engines from theses. Theses Gaokin engines are quite good and very good with a bit of modification. It's generally easier to get base materials theses day that i can mill myself. Designed a parallel tandem twin 4-stroke that is easily scalable. Less complicated for the carb or fuel injection systems. Good on gas, not particularly noisy either. More of a slow non knocky diesel sound. It can be either air or liquid cooled depending on the size. Got it to a stable 7100rpm. But lets say 6800rpm average top end to be on the more realistic side. HP wise since it a tandem twin will be rather high basically double the torque of a conventional walking style two piston rig. In a large atv a 750cc Ttwin put out 102+hp, far more than what it needs. That's all that's new on my end. The snowmobiles with the 650 gaokin engines are working perfectly.
@@EllipsisAircraft I can't post any links any longer. You will have to google "gaokin engine" and email the sale persons and they will give you the usa dealer list. Sorry but youtube blocks everything theses days.
Main work was drawing up the plates to bolt onto the cylinder barrel strong points, spacer tubes between and a distance piece to hold and brace the reduction drive backplate. One mount had to be fabricated out of plate and tube after removal of the ATV Quad gearbox and belt drive, it fixed onto the gearbox bolt holes. Fuel injection was hard as the diagram was in part Chinese, part English but ended up really simple, as Delphi has designed the wiring harness with dedicated plugs for each item so you couldn't get them mixed up.
Hello Kevin Armstrong thanks for this video its good too see this engine in a video working, ive been looking into buying this exact engine from china for a Tracked vehicle build im going to impart on soon, an they real dont give alot of information about it.. question would you be interested in selling the ATV Quad gearbox an cvt belt drive ?? Cheer
Claimed 61hp, not sure what the carburated version is. I'd think it's short of that as holding it down to 5000-5500 and peaks at 6250-6500. Fuel burn and starting better than expected
Core motor very solid, for 800cc an output of 61hp is pretty mild. I had issues with ancillaries, such a fuel pipe connectors. Four years build to 10,000 feet test flight
it looks that these run a lot smoother and quieter than the vanguards and Kohler v twins, wow impressive, only thing is that they only have one year warranty. i realize why so quiet.. 4 valves per cylinder? nice, that's why the high hp to weight ratio?
The American Distributor of the Hisun HS300 ATV this is fitted to gives four years warranty, but if you press-gang any engine for this sort of job you aren't going to get any warranty, after all % of the reasons this will fail is bad installation
Kevin I just received the same engine. I’m having trouble with the wiring. To get the engine started. You wouldn’t have any photos or wiring diagrams you could share?
PM me your email address and can send it over, did you get a harness with twin ECU etc? You need a 3 bar pump and regulator bleed off return to the tank too after the pump outlet. I'm on Facebook so messenger is OK
@@KevinArmstrong4154 yes I have the two harnesses. I have the fuel pump with the pressure regulator and all hooked up. I just seem to have Extra wire connectors and I don’t know if I’m missing something and I don’t want I break anything.
@@jipn12 send a pm of your email address to my Facebook messenger address and will send the diagram for connections working on mine, this was second version, first one had the alternator keeping power to the pump and ECU so couldn't switch it off ;-)
When you ordered your engine did you have to order the electronics separately things like a cdi box or ignition parts etc? Im just curious what all was in the box when it came.
Harness, regulator (which is so good it can feed a lithium battery). I had to order the oxygen sensors as they'd forgot that part, and add a three bar fuel pump and a 2003 VW Polo fuel filter, as it has a built in regulator valve to a tank return set at three bar 42psi pressure. It's flying well now, making good power. Cdi boxes were included, all harness plugs matched so easy to connect as could not get them wrong. Lead cylinder coil feed and injector feed plugs had a yellow tape marker
Alibaba lists it but Gaokin, who make them, don't deal direct. They referred me to Stels, a Russian Quad builder, who has supplied a friend in Holland flying a Paratrike. Need to dig around the 'net and ask for motor with full wiring harness, as all the injection parts are made by Delphi, European component manufacturer. It's then very easy to set it all up as you can see.
Do you know if this is a clone? It sounds and looks exactly like a rotax 800, right down to the starter and intake manifold. Also where did you get it? Looks awesome!
Yes, Chinese clone by Gaokin, bought it via Alibaba, they refer you to a Russian ATV and Snowcat builder called Stels, also fitted to Hisun ATV sold in Texas. Beware, they've unitised the motor with the gearbox, I go the separated model and discarded the heavy transmission and variable belt drive, added a custom redrive from Ace Aviation, run by a Brit in India to keep costs low and quality high. Since flown it to 10,000 feet, been reliable too
@@KevinArmstrong4154 See this china engine two strokes 70 HP with double ignition www.made-in-china.com/showroom/chinasvgroup/product-detailhCwnMepuCLVa/China-P740-Paramotor-Engine.html
@@bernard9507 I would rather rely on a four stroke than a two stroke, seizures are unknown on four strokes. A single plug four stroke is more reliable, burns half the fuel and lasts longer
@@KevinArmstrong4154 I think you are right , can I install this engine on X air ultralight to replace Rotax 582 , is the mounting plate available randkar.free.fr/eng/xair.htm
ua-cam.com/video/_iqvXw8FmJc/v-deo.html if you're serious I have a Dropbox file, mail over your email address and I can add you to the folk able to view
To be honest, I've no idea, although the distributor who sold it sell Snowmobiles, and supplied a wiring harness and other goodies. Bought it via Alibaba from Connie Chen at Copower, Wuxi, and discarded the heavy gearbox, adding a custom reduction drive made by aceaviation.co.uk to my design
Found it is fitted to the HiSun ATVs sold by a Texan distributor, watch out as Gaokin have upgraded to integral gearbox on some models so cannot be removed
I hear ya buddy! You're doing great! I wasn't implying you supplying me with one, but I'd love to know the weight. I'm already making contact with a Chinese source of the engine.
Wow, 61HP! What is the weight compared to the Briggs and stratton? Electronic fuel injection with redundancy? Or is it mechanical? Nice engine and installation.
Delphi electronic fuel injection, I'm not an expert but got advice early, the system has a wiring harness with each component with its own special plug, so you can't mix them up. Additional items are the 3-bar pump to feed the injectors, which cost £50 from McGill Motorsports in Scotland, and a VW Polo fuel filter, which incorporates a regualtor valve that feeds excess pressure back to the fuel tank. Fuel circulates all the time the engine's running, being filtered. Just swapped the injectors for the spares they sent and it runs way better, bound to be crud in brand new lines when forced onto the hose barbs.
@Ronald Brown ua-cam.com/video/io9Zn253u-0/v-deo.html, it's used in the Hisun HS300 ATV and version go in snowmobiles and personal watercraft. It's on the Gaokin website in various applications
The general rule is for every 15 CC there is 1 HP. For example, for a 150 CC engine you would take 150 divided by 15, which equals 10 HP so, 53.3 hp based on general rule for 800cc Looking at prostock engines with four valve heads they get around 270 horsepover out of 1298cc.or 1 hp per 5 cc, triple a stock engine so even if this engine is at the basic ruler of hp per cc, its not bad, depending on overall weight of the entire firewall forward weight, versus a 2 stroke weight, and may have room for more hp via mods
@@tracytracyherestracy You forgot an extremely important parameter in your general rule; Revolutions. There is no "general rule" about horsepower per liter. There IS a general rule about horsepower vs airflow. Airflow is: Displacement x RPM x Efficiency (around 0.85-0.95), This multiplied by 0.5 (for 4 stroke). E.g: 800cc x 6,250 x 0.9 x 0.5 = 2.25m^3 per minute. 2.25 Cubic Meters of air is 1.22514 Kg x 0.08 (12.5:1 AFR) = 0.2205 kg/min fuel flow rate x 60 mins per hour = 13.23kg/hr fuel flow. (Thats 18.4 Liters/Hr of fuel at 0.72kg/L density). BSFC = 0.291 kg/kw at 61 horsepower. Thats a BSFC of 0.478 lb/hp/hr for the free world.
Kevin , I am planning to make a paramotor trike with Vanguard Briggs and Stratton 21hp horizontal engine. Do you know anyone who might be able to help me fit a propellor adaptor to it?...any advice appreciated. Thanks, Lorne
@@lornescott-wilson6144 go to ace aviation website, they got one off the shelf for you but take forever to get sometimes.there out of india. i got a (27hp) 750cc kohler efi engine for sale brand new if interested i bought for ppg trike. really good price and better than the briggs same weight size bolt pattern etc etc IMO
Dan Charter beautiful castings, tight as hell, lot less vibration, smoother than the Briggs. Intend fitting the spare injectors as rubber might be blocking the nozzles. Trickier to attach the redrive bit I've drawn up the parts now so recipe easy to follow. Will report back when belt length sorted, propeller installed and wiring tidy!
Only 76.25hp per litre, set up not as a screamer like the Yamaha, Honda and Suzikis. I owned a 675cc Triumph at 100hp, 650cc Suzuki at 75hp. They have no reason to lie, as size is built to suit ATV and Quad
@@talusranch990 it pushes my 250 kilos to 10,000 feet, climbs at 1,100 feet per minute, a main distributor in Texas sells the Hisun ATV and this motor powers it for the USA market, which would lead to legsl action if they lied. So I aren't fussed whether they lie or not, it does what I need, cheers.
I've moved onto custom designed/build engines from theses. Theses Gaokin engines are quite good and very good with a bit of modification. It's generally easier to get base materials theses day that i can mill myself. Designed a parallel tandem twin 4-stroke that is easily scalable. Less complicated for the carb or fuel injection systems. Good on gas, not particularly noisy either. More of a slow non knocky diesel sound. It can be either air or liquid cooled depending on the size. Got it to a stable 7100rpm. But lets say 6800rpm average top end to be on the more realistic side. HP wise since it a tandem twin will be rather high basically double the torque of a conventional walking style two piston rig. In a large atv a 750cc Ttwin put out 102+hp, far more than what it needs.
That's all that's new on my end. The snowmobiles with the 650 gaokin engines are working perfectly.
Are You in the states? Where might be a good source for these Gaokin engines?
@@EllipsisAircraft I can't post any links any longer. You will have to google "gaokin engine" and email the sale persons and they will give you the usa dealer list. Sorry but youtube blocks everything theses days.
Main work was drawing up the plates to bolt onto the cylinder barrel strong points, spacer tubes between and a distance piece to hold and brace the reduction drive backplate. One mount had to be fabricated out of plate and tube after removal of the ATV Quad gearbox and belt drive, it fixed onto the gearbox bolt holes. Fuel injection was hard as the diagram was in part Chinese, part English but ended up really simple, as Delphi has designed the wiring harness with dedicated plugs for each item so you couldn't get them mixed up.
Hello Kevin Armstrong thanks for this video its good too see this engine in a video working, ive been looking into buying this exact engine from china for a Tracked vehicle build im going to impart on soon, an they real dont give alot of information about it.. question would you be interested in selling the ATV Quad gearbox an cvt belt drive ?? Cheer
@@clayhunna7357 sorry, gave it away two years ago
You can buy the engine complete with cvt transmission and drive shafts
Claimed 61hp, not sure what the carburated version is. I'd think it's short of that as holding it down to 5000-5500 and peaks at 6250-6500. Fuel burn and starting better than expected
Has this engine remained reliable for several years? I'm considering adapting the 61&65hp models for a fixed/rigid wing experimental.
Core motor very solid, for 800cc an output of 61hp is pretty mild. I had issues with ancillaries, such a fuel pipe connectors. Four years build to 10,000 feet test flight
Great! Thanks.
it looks that these run a lot smoother and quieter than the vanguards and Kohler v twins, wow impressive, only thing is that they only have one year warranty. i realize why so quiet.. 4 valves per cylinder? nice, that's why the high hp to weight ratio?
The American Distributor of the Hisun HS300 ATV this is fitted to gives four years warranty, but if you press-gang any engine for this sort of job you aren't going to get any warranty, after all % of the reasons this will fail is bad installation
@@KevinArmstrong4154 i think you meant hs800?
/@@sacooper802 Maybe originally mis labelled, the 800 seems to have disappeared in the American catalogue
Kevin I just received the same engine. I’m having trouble with the wiring. To get the engine started. You wouldn’t have any photos or wiring diagrams you could share?
PM me your email address and can send it over, did you get a harness with twin ECU etc? You need a 3 bar pump and regulator bleed off return to the tank too after the pump outlet. I'm on Facebook so messenger is OK
My son taught in China so he's translated the wiring harness
@@KevinArmstrong4154 yes I have the two harnesses. I have the fuel pump with the pressure regulator and all hooked up. I just seem to have Extra wire connectors and I don’t know if I’m missing something and I don’t want I break anything.
@@jipn12 send a pm of your email address to my Facebook messenger address and will send the diagram for connections working on mine, this was second version, first one had the alternator keeping power to the pump and ECU so couldn't switch it off ;-)
@@jipn12 facebook.com/Kevanorak/about_contact_and_basic_info
Sieht vielversprechend aus.
Habe es auf 3.048 m gebracht und es dann verkauft, weil es heutzutage etwas in die Jahre gekommen ist ;-)
I'd love to put one of these same engines on a small dune buggy.
Do you know whether the engine has a forged crank and rods and does it have pressure oil lubrication (or just splash)?
Pressure lube and steel crank, good for 7000 plus appare6
@@KevinArmstrong4154 "Steel crank". Does that mean it is forged or is it cast? Thanks
When you ordered your engine did you have to order the electronics separately things like a cdi box or ignition parts etc? Im just curious what all was in the box when it came.
Harness, regulator (which is so good it can feed a lithium battery). I had to order the oxygen sensors as they'd forgot that part, and add a three bar fuel pump and a 2003 VW Polo fuel filter, as it has a built in regulator valve to a tank return set at three bar 42psi pressure. It's flying well now, making good power. Cdi boxes were included, all harness plugs matched so easy to connect as could not get them wrong. Lead cylinder coil feed and injector feed plugs had a yellow tape marker
@@KevinArmstrong4154 Thank you for the info
Hey Kev. Where did you get this motor?
Alibaba lists it but Gaokin, who make them, don't deal direct. They referred me to Stels, a Russian Quad builder, who has supplied a friend in Holland flying a Paratrike. Need to dig around the 'net and ask for motor with full wiring harness, as all the injection parts are made by Delphi, European component manufacturer. It's then very easy to set it all up as you can see.
Do you know if this is a clone? It sounds and looks exactly like a rotax 800, right down to the starter and intake manifold. Also where did you get it? Looks awesome!
Yes, Chinese clone by Gaokin, bought it via Alibaba, they refer you to a Russian ATV and Snowcat builder called Stels, also fitted to Hisun ATV sold in Texas. Beware, they've unitised the motor with the gearbox, I go the separated model and discarded the heavy transmission and variable belt drive, added a custom redrive from Ace Aviation, run by a Brit in India to keep costs low and quality high. Since flown it to 10,000 feet, been reliable too
is there double ignition on this engine ?
No, it isn't a two stroke and burns clean as it is fuel injected, so plugs stay spotless
@@KevinArmstrong4154 See this china engine two strokes 70 HP with double ignition
www.made-in-china.com/showroom/chinasvgroup/product-detailhCwnMepuCLVa/China-P740-Paramotor-Engine.html
@@bernard9507 I would rather rely on a four stroke than a two stroke, seizures are unknown on four strokes. A single plug four stroke is more reliable, burns half the fuel and lasts longer
@@KevinArmstrong4154 I think you are right , can I install this engine on X air ultralight to replace Rotax 582 , is the mounting plate available
randkar.free.fr/eng/xair.htm
we dont use double ignition on modern electronic ignition fuel injected engines anymore, u r living in the past
Any more info on this?
ua-cam.com/video/_iqvXw8FmJc/v-deo.html if you're serious I have a Dropbox file, mail over your email address and I can add you to the folk able to view
Kevin, What ATV did the engine come out of ? I am looking for an engine to use in my future project (Heath parasol), This one might work.
To be honest, I've no idea, although the distributor who sold it sell Snowmobiles, and supplied a wiring harness and other goodies. Bought it via Alibaba from Connie Chen at Copower, Wuxi, and discarded the heavy gearbox, adding a custom reduction drive made by aceaviation.co.uk to my design
Hope to fly it in a few weeks
@@KevinArmstrong4154 How did the flight go? Also what's the HP rating on these little gems?
Apparently they are fitted to Hisun atvs, will update when back from holidays
Found it is fitted to the HiSun ATVs sold by a Texan distributor, watch out as Gaokin have upgraded to integral gearbox on some models so cannot be removed
What is the weight? Looks great! I'm very interested !
billyvray not selling it Billy but happy to share recipe, it's my hobby
I hear ya buddy! You're doing great! I wasn't implying you supplying me with one, but I'd love to know the weight. I'm already making contact with a Chinese source of the engine.
bare engine was 43 kilos, the exhaust I've made are way too heavy, intend carving them up and swapping casings for 22g stainless
Wow, 61HP! What is the weight compared to the Briggs and stratton? Electronic fuel injection with redundancy? Or is it mechanical? Nice engine and installation.
Delphi electronic fuel injection, I'm not an expert but got advice early, the system has a wiring harness with each component with its own special plug, so you can't mix them up. Additional items are the 3-bar pump to feed the injectors, which cost £50 from McGill Motorsports in Scotland, and a VW Polo fuel filter, which incorporates a regualtor valve that feeds excess pressure back to the fuel tank. Fuel circulates all the time the engine's running, being filtered. Just swapped the injectors for the spares they sent and it runs way better, bound to be crud in brand new lines when forced onto the hose barbs.
engine weight excluding exhaust
I dont think it is near 61hp. 4cyl 800cc. Doubt you getthe rpms you need with the prop
On and loading it in a climb
Two cylinder and does 1100 feet per minute climb
@Ronald Brown ua-cam.com/video/io9Zn253u-0/v-deo.html, it's used in the Hisun HS300 ATV and version go in snowmobiles and personal watercraft. It's on the Gaokin website in various applications
The general rule is for every 15 CC there is 1 HP. For example, for a 150 CC engine you would take 150 divided by 15, which equals 10 HP
so, 53.3 hp based on general rule for 800cc
Looking at prostock engines with four valve heads they get around 270 horsepover out of 1298cc.or 1 hp per 5 cc, triple a stock engine
so even if this engine is at the basic ruler of hp per cc, its not bad, depending on overall weight of the entire firewall forward weight, versus a 2 stroke weight, and may have room for more hp via mods
@@tracytracyherestracy
You forgot an extremely important parameter in your general rule; Revolutions.
There is no "general rule" about horsepower per liter.
There IS a general rule about horsepower vs airflow.
Airflow is: Displacement x RPM x Efficiency (around 0.85-0.95), This multiplied by 0.5 (for 4 stroke).
E.g: 800cc x 6,250 x 0.9 x 0.5 = 2.25m^3 per minute.
2.25 Cubic Meters of air is 1.22514 Kg
x 0.08 (12.5:1 AFR) = 0.2205 kg/min fuel flow rate x 60 mins per hour = 13.23kg/hr fuel flow. (Thats 18.4 Liters/Hr of fuel at 0.72kg/L density).
BSFC = 0.291 kg/kw at 61 horsepower.
Thats a BSFC of 0.478 lb/hp/hr for the free world.
I should note: 61 HP is 99.3% believable based on this rational "general method".
what is the brandname of this eingine before modiflying ?
Gaokin
@@KevinArmstrong4154 thank you very much
@@howardyin The core engine was left alone, I'd tuned a Briggs but always best to use an engine that is built to make the power in the first place
Kevin , I am planning to make a paramotor trike with Vanguard Briggs and Stratton 21hp horizontal engine. Do you know anyone who might be able to help me fit a propellor adaptor to it?...any advice appreciated. Thanks, Lorne
@@lornescott-wilson6144 go to ace aviation website, they got one off the shelf for you but take forever to get sometimes.there out of india. i got a (27hp) 750cc kohler efi engine for sale brand new if interested i bought for ppg trike. really good price and better than the briggs same weight size bolt pattern etc etc IMO
Sooo, what'd you think of that engine?
Dan Charter beautiful castings, tight as hell, lot less vibration, smoother than the Briggs. Intend fitting the spare injectors as rubber might be blocking the nozzles. Trickier to attach the redrive bit I've drawn up the parts now so recipe easy to follow. Will report back when belt length sorted, propeller installed and wiring tidy!
Huh... you forgot the prop
ua-cam.com/video/XgcPRo5cQXA/v-deo.html
Put a Hayabusa engine on it.
Imagine that, chineeeeeee lied
Only 76.25hp per litre, set up not as a screamer like the Yamaha, Honda and Suzikis. I owned a 675cc Triumph at 100hp, 650cc Suzuki at 75hp. They have no reason to lie, as size is built to suit ATV and Quad
@@KevinArmstrong4154 lie is all they do. Why would you attempt to defend that group of people? Korea still can't get the hp Japan gets per liter.....
@@talusranch990 it pushes my 250 kilos to 10,000 feet, climbs at 1,100 feet per minute, a main distributor in Texas sells the Hisun ATV and this motor powers it for the USA market, which would lead to legsl action if they lied. So I aren't fussed whether they lie or not, it does what I need, cheers.