Hi guys, I do like keeping myself busy so I decided to build a drift trike. So to start I got the engine from a new generator 6.5hp I had cheap (£50) but I had to machine the crankshaft on the lathe and mill a keyway to accept a centrifugal clutch, then it was a case of making a frame up and offering it all up.
I used 25mm 2.5mm wall box for the engine and axle frame and some 50x25 box to join onto half a an old BMX I found and cut up, I also had to cut the BMX to change the rake of the top tube so the seat stays parallel to the ground. I had some scrap stainless to make a sprocket cover and fuel tank. Also I faced the axle and hubs and then drilled and tapped them to accept go kart wheels. I also made the sprocket carrier from some 3mm sheet I had laying about aswell as some stainless pegs to put my feet on.
Upon removing the crankshaft for machining I also removed the restrict or to allowed the engine to rev past 3000RPM thus it produces more horsepower in the higher RPMs some go kart enthusiastsssay double the power for double the RPM, the engine is a Honda Gx160 clone but is slightly more powerful stock, I also machined a smaller timing woodruff key to advance timing to produce more power in the higher RPM or retard for lower down torque, these engines are designed to run from atleast 86octane so the manufacturers are conservative with ignition timing, in most fuel stations we have unleaded E10 95RON so it's okay to advance.
Probably alot I've missed but just wanted to share to inspire others, I've owned another a few years ago which was smaller in design and had a 110cc manual engine I can say for sure this engine is alot more powerful I have only touched the throttle a quarter and it's not foe thr faint hearted, I still need to get a brake also. It is geared 1:4.5 and should do 45mph but the gearing is good to spin the wheels from idle. Without sleeves it was quite scary if I'm honest. Edit:axle and hubs are EN8 and the trike is suited to me being 70kg
I used 25mm 2.5mm wall box for the engine and axle frame and some 50x25 box to join onto half a an old BMX I found and cut up, I also had to cut the BMX to change the rake of the top tube so the seat stays parallel to the ground. I had some scrap stainless to make a sprocket cover and fuel tank. Also I faced the axle and hubs and then drilled and tapped them to accept go kart wheels. I also made the sprocket carrier from some 3mm sheet I had laying about aswell as some stainless pegs to put my feet on.
Upon removing the crankshaft for machining I also removed the restrict or to allowed the engine to rev past 3000RPM thus it produces more horsepower in the higher RPMs some go kart enthusiastsssay double the power for double the RPM, the engine is a Honda Gx160 clone but is slightly more powerful stock, I also machined a smaller timing woodruff key to advance timing to produce more power in the higher RPM or retard for lower down torque, these engines are designed to run from atleast 86octane so the manufacturers are conservative with ignition timing, in most fuel stations we have unleaded E10 95RON so it's okay to advance.
Probably alot I've missed but just wanted to share to inspire others, I've owned another a few years ago which was smaller in design and had a 110cc manual engine I can say for sure this engine is alot more powerful I have only touched the throttle a quarter and it's not foe thr faint hearted, I still need to get a brake also. It is geared 1:4.5 and should do 45mph but the gearing is good to spin the wheels from idle. Without sleeves it was quite scary if I'm honest. Edit:axle and hubs are EN8 and the trike is suited to me being 70kg