Buy 80cc or 100cc?

[OrionSphere]

I'm looking at getting a cheap 66/80cc OR a 100cc motor kit on amazon for my secondary, old bike.

Will a 100cc motor be less reliable than an 80cc, and will it be harder to find replacement parts?

This is the 100cc engine I have picked out on Amazon: PEXMOR 100cc Bicycle Engine Bike Motor Kit, 2 Stroke Gas Motorized Bike Conversion Kit, Gasoline Petrol Bicycle Motor Refit Full Set for 26-28" Bikes with V-Frame,Super Fuel-efficient https://a.co/d/fsiS2RN
It has the highest ratio of reviews to total sales

And if I were to get an 80cc engine, it would be: Seeutek PK80 80cc Bicycle Engine Kit 2 Stroke Gas Motorized Bike Motor Kit Upgrade with Speedometer https://a.co/d/4r3J2we
A Seeutek, which has some history in this forum of being reliable.

I would prefer the 100cc, but if it's really just a bad idea, for one reason or another, please let me know.

 

[DieselTech]

I'm looking at getting a cheap 66/80cc OR a 100cc motor kit on amazon for my secondary, old bike.

Will a 100cc motor be less reliable than an 80cc, and will it be harder to find replacement parts?

This is the 100cc engine I have picked out on Amazon: PEXMOR 100cc Bicycle Engine Bike Motor Kit, 2 Stroke Gas Motorized Bike Conversion Kit, Gasoline Petrol Bicycle Motor Refit Full Set for 26-28" Bikes with V-Frame,Super Fuel-efficient https://a.co/d/fsiS2RN
It has the highest ratio of reviews to total sales

And if I were to get an 80cc engine, it would be: Seeutek PK80 80cc Bicycle Engine Kit 2 Stroke Gas Motorized Bike Motor Kit Upgrade with Speedometer https://a.co/d/4r3J2we
A Seeutek, which has some history in this forum of being reliable.

I would prefer the 100cc, but if it's really just a bad idea, for one reason or another, please let me know.

The pexmor or the CDH 100cc are a good engine. They need some port cleanup work. But also with a bit of work, they are a screaming demon.

 

[Wyvern]

I'm looking at getting a cheap 66/80cc OR a 100cc motor kit on amazon for my secondary, old bike.

Will a 100cc motor be less reliable than an 80cc, and will it be harder to find replacement parts?

This is the 100cc engine I have picked out on Amazon: PEXMOR 100cc Bicycle Engine Bike Motor Kit, 2 Stroke Gas Motorized Bike Conversion Kit, Gasoline Petrol Bicycle Motor Refit Full Set for 26-28" Bikes with V-Frame,Super Fuel-efficient https://a.co/d/fsiS2RN
It has the highest ratio of reviews to total sales

And if I were to get an 80cc engine, it would be: Seeutek PK80 80cc Bicycle Engine Kit 2 Stroke Gas Motorized Bike Motor Kit Upgrade with Speedometer https://a.co/d/4r3J2we
A Seeutek, which has some history in this forum of being reliable.

I would prefer the 100cc, but if it's really just a bad idea, for one reason or another, please let me know.

Unless I am mistaken.

100cc kits are 80cc
and 80cc kits are 66cc

This is because of china measurement vs. the rest of the world.

Torque (YD)vs. top end (PK)

 

[DieselTech]

Just wait for Damien to chime in. He is going to say he has got a bazillion miles on his 1st seeutek.

 

[OrionSphere]

Unless I am mistaken.

100cc kits are 80cc
and 80cc kits are 66cc

This is because of china measurement vs. the rest of the world.

Torque (YD)vs. top end (PK)

I think 100cc is 77cc and 80cc is 66cc

I'm just throwing out those numbers because they're the numbers you have to shop for

 

[OrionSphere]

I decided I need 2 motorized bicycles to have reliable transportation so when one is broken I can drive the other while I wait for parts. An infinite cycle.

That's why I had the phantom motor and now this

 

[DieselTech]

I personally like the steel sleeve 100cc engines. Or 79.5cc how ever you wanna look at it.

 

[OrionSphere]

The pexmor or the CDH 100cc are a good engine. They need some port cleanup work. But also with a bit of work, they are a screaming demon.

You mean the CDH 110cc?

 

[OrionSphere]

I personally like the steel sleeve 100cc engines. Or 79.5cc how ever you wanna look at it.

Not sure what you mean

 

[DieselTech]

You mean the CDH 110cc?

NO. CDH 100cc steel sleeve. I think CDH called it a super pk80 but it is a 49mm bore china girl. Stay away from the 110.