Not so Budget build

This is my first post, but my second motorized bike. The first was a Kent mb with a 66cc that i bought completed. It was great, but I gave it away a few years ago before ever doing anything to it.

I've built a 48v/1600watt scooter for running my dogs that I gave to my nephews, and a 48v/1000watt fat tire mb that i still own at another property. my main complaint about electric bikes has always been up-front cost, don't store well, and break-fix cost. It seems if you let the ebike sit for a few months and come back, something is now not working... moisture got to something... your $400 battery is half the ah or totally bricked... something.

So I decided last month to try a cheap yd100 budget build for going 8mi back and forth from the store. Here's my initial plan.
150 for schwinn sidewinder
115 for ebay yd100 kit
53 for 56t+adapter
12 for double brake lever
6 for shorty cnc intake
Plus a few bolts/etc

Total $350. Now the "but".
I ran the bike over backing out to go get the packages. I destroyed the front wheel and fork... so updates costs:
50 for a solid fork with disc brake mount
20 for Craigslist 26" wheel set

we're now at $420 and haven't even got it started yet, but finally... it started.

The shorty cnc intake on this bike puts the carb in a angle that seems to flood the motor, so the carb either leaks wildly or won't start after float adjustments. I'm currently waiting for an offset intake that I'm hoping I can bent enough to get the carb to sit level, and while I wait I ordered an nt carb, air filter and 10mm circle clips.
12 for nt carb
8 for circle clips
7 for offset intake
5 for cone air filter

~$480

Still waiting...

Forgot pics

 

[Sidewinder Jerry]

So I'm going to assume you bought a used Schwinn Sidewinder??? What you're going to quickly discover is, these bikes are like having a young girlfriend. You'll always be spending money on them in order to ride them.

I quit counting after a $1000

 

[ImpulseRocket]

Nice combination of parts and a good result. I always liked the yd100, even if they are often a little unimpressive compared to a strong 66cc like the Fireatorm 80. A little tweaking and they can be quite good.

 

[Dirty Nomad]

The bike wasn't used, brand new 2022. Walmart had them for 148 for Xmas, 198 regularly priced.

Given your name, did you have to do anything funky with your intake to get it to level? I followed the advise of a youtuber on the cnc shorty... I also had to remove the rear mount spacer to get everything to fit inside the frame.

 

[Dirty Nomad]

Nice combination of parts and a good result. I always liked the yd100, even if they are often a little unimpressive compared to a strong 66cc like the Fireatorm 80. A little tweaking and they can be quite good.

I was planning on porting the jug before I got it, but when I received it I pulled the jug off to check the piston was mounted right, and I really didn't see a need for porting. The gaskets went into the path of flow but the ports seemed well matched and clean.

I think I'll but the circle clips in for insurance, add a f2 thruster pipe and call it good. What little tweaks do you suggest?

 

[DAMIEN1307]

So I'm going to assume you bought a used Schwinn Sidewinder??? What you're going to quickly discover is, these bikes are like having a young girlfriend. You'll always be spending money on them in order to ride them.

I quit counting after a $1000

The bike wasn't used, brand new 2022. Walmart had them for 148 for Xmas, 198 regularly priced.

Given your name, did you have to do anything funky with your intake to get it to level?

Jerry won't be able to answer that one for ya...lol...He's a four stroker, rear mounted motor with friction drive, not a two stroke guy...lol...Here is a pic of his build.

 

[Sidewinder Jerry]

Jerry won't be able to answer that one for ya...lol...He's a four stroker, rear mounted motor with friction drive, not a two stroke guy...lol...Here is a pic of his build.

Friction????

Chain drive triple chainring shift kit.

 

[2speedboi]

Jerry has a chain drive! hell chime in, a second to rip ya one.

 

[2speedboi]

Pow!

 

[ImpulseRocket]

I was planning on porting the jug before I got it, but when I received it I pulled the jug off to check the piston was mounted right, and I really didn't see a need for porting. The gaskets went into the path of flow but the ports seemed well matched and clean.

I think I'll but the circle clips in for insurance, add a f2 thruster pipe and call it good. What little tweaks do you suggest?

It's not a matter of the ports being clean really, but the timing numbers can often be a bit wonky. My last yd100 had a 2 degree difference in transfer port timing between each side and abysmal blowdown (too much) to boot. It also had about 2mm of squish gap. Intake and exhaust port timing were actually alright.

I always check my port timing on new cylinders for that reason.