Custom 70cc engine build

[Z.hb71]

ok i think ill try to download a CAD modeler app and try to learn it, because i have a idea that is very hard to explain and i cant really make it out of cardboard for a model.

 

[Z.hb71]

k I couldn't figure out cad modeling cuz im stoopid (jk) and i figured that idea wouldn't work very well so I decided to scrap it and after some thinking, i came up with this idea. so i want to buy a gear like this (the largest 1)


and drill out the center so i can put a crank bearing in there and then slide this onto the crank when the crank is in the case and the gear will sit in this part of the case

then i will make a mount for the hall sensore and mount that too the gear. then i can put a pinnion on the old alx pickup mounts so they will holt the other gear that sits in the crank from spinning.. but to adjust it i loosen the pinion so i can spin the other gear and adjust timing. then the 40mm flywheel will be above the gear not touching it. hope that made any sort of sense lol soon ill make sum fake gears and stuff so u can get a idea of what im talking about

 

[Seandonato73]

Cool idea. I like it. You'll need a gear with fine teeth so you have a bunch of adjustment. Or make a slot in your holder gear for fine adjustment.

 

[Z.hb71]

Cool idea. I like it. You'll need a gear with fine teeth so you have a bunch of adjustment. Or make a slot in your holder gear for fine adjustment.

No the teath are only for locking the gear into place, if I loosen the pinion and in mesh it from the other gear and can make fine adjustment and then re mesh it, so their not fixed gears

 

[Seandonato73]

Ah yes! That would work well too.

 

[Z.hb71]

Ah yes! That would work well too.

Yep. I think this is probably the best idea whilst keeping this affordable ?
Here is a mock up


See there's the bottom gear (obvs just a prototype) with the hall sensor mount

The there's the bottom gear, sensor mount, and locking gear

Then this is with flywheel, both gears, and sensor mount
That gear is not the actual gear I'll use it's just a mock up gear. I think this will work. I've found me a 40mm flywheel. Just need gears which should be easy enough. I'll need to make a custom mount for the locking gear. Also I'll make a custom bracket thing that will hold the wire of the sensor so it don't get snagged in the Flywheel, cuz that's not fun.

 

[Seandonato73]

Me like it.

 

[Z.hb71]

Me like it.

Awesome ??

 

[crucialRC]

Good thinking outside the box.

 

[Z.hb71]

Good thinking outside the box.

Thanks!

 

[Z.hb71]

how thick aluminum should i use for the hall sensor bracket for the ignition? im thinking .125 inch.

 

[Seandonato73]

That's most likely fine.

 

[Z.hb71]

That's most likely fine.

okay, cant really go wrong, 3 bucks for flat stock 36 inch length
could make many things

 

[Seandonato73]

Yeah it's not like the sensor is super heavy or anything. And for that price you cant go too wrong

 

[Z.hb71]

Yeah it's not like the sensor is super heavy or anything. And for that price you cant go too wrong

yeah sensor pretty much weighs nothin. also need exhaust braces so its a 2 in 1 deal, actually a 3 in 1. hall sensor mount, wire holder for the hall sensor, and exhaust brace.

 

[Z.hb71]

mkay i think next week ill have enough money for the whole ignition system if I'm not mistaken

 

[Polar_Bus]

OK, well if you decide to go fixed/ adjustable sensor :







See if you can find a free downloadable Autocad Inventor viewer that can read ".ipt" type files . I can email you the assembly file.

 

[Z.hb71]

OK, well if you decide to go fixed/ adjustable sensor :







See if you can find a free downloadable Autocad Inventor viewer that can read ".ipt" type files . I can email you the assembly file.

Found 1. Send it please and thank you!

 

[Z.hb71]

mkay so now I have 164 USD so for that i can get the CDI, tach, ignition tester with a degree wheel, flywheel, clutch bell. then after that, I just need 58 dollars in more parts but I think I might save 70 just in case for any BS that might come up. WERE GETTING CLOSE! this might actually happen.

 

[crucialRC]

Cool Z. Let's do it.