9Hp for $120 ? Where did you find it - I thought you put the Etek in your pocket bike
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Australian 2015 Featherweight champion
UK 2016 Gladiator champion

9HP for $120, sounds like a chainsaw to me
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https://www.halfdonethings.com/

indeed

however air cooled chainsaw motors cant provide the right power for the weight so its actually a water cooled pocket bike engine thats been de-rated from 14hp because i cant fit the big exhaust on it.

i got some really cool micro radiators on the way too will grab some pics of them soon. just need to order a pumper carb so i can stick the motor sideways
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

just run the normal carby sideways
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The Engine Whisperer - fixer of things

well today was a pretty big bludge. did nothing really except pack so i had some time to muse on the merging of gasoline to robot and do it safely and properly

the plan was to originally make the phailbot into an icewave clone with the motor up over the shaft. but theres a ton of work involved in that and i think the bar spinner isnt so great a design against wedges and lower robots.. obviously heh.

so instead im thinking of making a homage to my favourite robot, mad dog / code black! this way i can keep the motor tucked away nicely inside and such and keep the blade low enough to attack most others.

was going to use the watercooled motor but putting a box exhaust on it would derate the power so hardcore its not funny. and a pumper carb the size i need is almost $300. so ill just use my spare CAG engine thats only aircooled but i can get pre made wrap around exhausts and pumper carbs plenty cheap.

and im pretty sure the float type carb wont enjoy the massive shocks

but in any case i think itll be a fine weapon setup. same lenght and weight as before just inverted. will lay some bits out and take some pics
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

Hehe, so its going to be your 9hp ICE vs. my 6hp electric undercuter! 6mm polycarb on the arena suddenly seems inadequate!

Good luck in Melbourne!
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Australian 2015 Featherweight champion
UK 2016 Gladiator champion

cheers

im bidding on a few bits on ebay at the moment, most notably a nitrous kit and methanol capable gaskets and things so i might shave some mm off the bottom of the barrel, run it at 16:1 and get some serious balls out of it.

just need to think of a design and such when im not so stressing out over melbourne cheers for the compliment! hope your arm gets better soon
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

carb probably wont be bothered overly much. The shock might well stall the engine though, put a starter on it.
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Mechanical engineers build weapons, civil engineers build targets

thats something i was looking at too, use a tiny brushless to crank it over. lathe will make it all so easy
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

got my new flywheel installed and the walbro 16mm carby showed up. i love it. its heaps tiny and bolts onto the motor instead fo clamping on so it will be heaps strong. looks the buisiness too. ill get some pics up tommorow.

now to work out how to mount the servo throttle and choke throttle and starter motor
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

don't forget a failsafe with idle return
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Mechanical engineers build weapons, civil engineers build targets

indeed. i will also have a remote cut off on the ignition side too.

but heres the motors lightened flywheel. the stockers are notorious for having shocking balance and really lag the acceleration down pretty bad. and for a 3 minute fight that degree of air cooling isnt neccessary so we hack off some of the fins.



also got the 16mm carb on and working. it has an internal fuel pump that works from the crankcase vacuum so it can run inverted and not be affected as much as float carbs. not to mention with an ali manifold and being held on with bolts instead of clamps it will be plenty strong.




size comparison with a normal ev motor.


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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

still need to pretty it up but its done.



now i have to make a proper solid throttle linkage and find a way to either make the internal throttle spring much more resistive or just add another one in.

next is the electric starter setup then i can progress into the integrate it into the robot stage
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

good news! i found a compatible electric start its just a small scooter motor that builds into the casing and has a freewheel internal to it. so thats a big bit of progress. should be here soon but it should mean a gas motor could be quite effective..

and the frame is a bit more layed out. looks a bit of a cross between mad dog chopper and bender with a few twists thrown in there. but it has a huge tuned pipe laying across the top then out the back so there should be some serious balls in the setup.

tommorow ill work on the pulley setup. its just a reverse thread M10 so ill try get the bolt for it then weld that into the pulley and thread it in.

not sure if ill get it done come next event. maybe if i get the lathe. DAMN HARE AND FORBES OPEN ON WEEKENDS YOU BASTARDS
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

They are you jackass, they close at 12 on saturdays, same with edcon
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Andrew Welch, Team Unconventional Robotics