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Howdy, I'm trying to find out what a particular engine style is called. Is there an engine that has a drive belt on both sides of the block, so that there is a drive belt going to both sides of the rear wheel. Very new to bikes and engines. Trying to design a chopper of my own. thanks in advance for your help. Any website with a photo of this type engine would be appreciated.

Two drive belts would be called dual drive belts. I'm pretty sure I've seen it done on one of those bike building shows on the TV.

Marty1955 wrote:Howdy, I'm trying to find out what a particular engine style is called. Is there an engine that has a drive belt on both sides of the block, so that there is a drive belt going to both sides of the rear wheel. Very new to bikes and engines. Trying to design a chopper of my own. thanks in advance for your help. Any website with a photo of this type engine would be appreciated.

why would you want to do that?

Some Harley type Vtwins with separate transmissions have a "Primary Drive Belt" on one side (Connects Engine crank to Transmission input) and then a belt on the other side, connecting the output shaft of the trans to the wheel sprocket with a toothed belt.

Is that what you may of saw?

I've never seen a bike with 2 belt, 2 chains or 2 drive shafts to the same wheel.

I saw a old Honda 90 with two chains going to different size sprockets on the wheel. Also had a chain going from trans to a shiftable box mounted on swingarm. Both drive chains came from this box. This gave HI/LOW capability to the older 90s before Honda came out with HI/LOW

slimcolo wrote:I saw a old Honda 90 with two chains going to different size sprockets on the wheel. Also had a chain going from trans to a shiftable box mounted on swingarm. Both drive chains came from this box. This gave HI/LOW capability to the older 90s before Honda came out with HI/LOW

But not to each side of the wheel.

Still, 2 chains as the OP described is very unusual.

slimcolo wrote:I saw a old Honda 90 with two chains going to different size sprockets on the wheel. Also had a chain going from trans to a shiftable box mounted on swingarm. Both drive chains came from this box. This gave HI/LOW capability to the older 90s before Honda came out with HI/LOW

I had a pushrod 90 in the 60's, and it used a sprocket "overlay" that bolted on the original rear sprocket, then had a small piece of chain that went on to make up the difference. The earliest OHC bikes had the same thing i believe, then the later ones came out with the selector built into the transmission, and turned with a wrench. i've never seen anything like you describe, but i could easily believe it was someone's experiment to keep from having to install and remove the overlay.