New DIY Motor Idea

[inspectorcritic]

Some dirty construction worker admiring my bike told me he made one from a from a demo saw, that is a saw that cuts concrete. He went through the procedure he was saying you half buy tires for high speeds cuz he can get his going up a 120 MPH.
I don't know the weight and size it might be like a 212 predator too big and heavy.
But good place to look for one would be at a pawn shop construction workers are always going broke.

 

[Vikingimike01]

Sure, if you wanna go that fast on a bicycle.

 

[Spare_Parts]

He's full of s**t.

 

[inspectorcritic]

He's full of sh*t.

Do you have any experience with demo motors to say that?
I'm sortive getting half interested if they would perform bitter.

 

[inspectorcritic]

Checking out some prices they go up to $1,000+ for the complete saw cops and rescue use them for can openers there light enough you can hold it up cut a wall or ceiling just like in them sci-fi horror movies grossly out doing a 212 predator takes 2 men to lift. Do I get a better motor cuz I paid more for it?
Saw one rated at 111cc you'd need a mounting plate then cut loose a lot of unneeded functions.
Some are 2 stroke some are 4.

 

[Spare_Parts]

Do you have any experience with demo motors to say that?
I'm sortive getting half interested if they would perform bitter.

Plenty and I hate using them. I use 3 different sizes from stihl and they have power once they get going put thats it, top end. They aren't built for anything but turning a blade or fiber disk at high rpm. They do have tuned pipes for them but my boss won't get me one lol. The guy was bs'ing you.

 

[extremeodd]

It would really be up to what motor he was using, 120mph would require a very powerful motor and you'd need some incredibly strong drivetrain parts to hold that power on a bicycle. An average mid-sized, carryable gas concrete saw looks to have roughly 7hp (looked for about 30 seconds, don't crucify me if that's not completely on point) which would be good for maybe 50-60mph if it was tuned well and the rider didn't weigh all that much.

 

[inspectorcritic]

Well I don't need to go 120 MPH nor does anyone else but it might be very nice to go 40-50MPH a stock motor has about
1.50 - 1.75HP what would 7 be like?

 

[extremeodd]

From what I've heard and seen, 7hp is more than good enough for 60+mph. The frankenstein sold by ZMS for $295 is supposedly good for about 7-8 hp on a good pipe, it's the same one they use in the videos of doing 60-70 they posted a while back. It's a standard bottom end/case with a stihl 044 chainsaw top end.


If it wasn't for the fact that it takes race gas and won't last as a daily driver, I'd order one in a heartbeat just to experience 7+ hp on a 50lb bike.

 

[inspectorcritic]

Right here is demo bike DIY but with lots of problems.