rearenginekarts.com

Rob Voska wrote: ↑

Wed Sep 28, 2022 6:50 am

Hard to tell from that picture. Are the mounts welded to the frame or a swing type of mount? Looks like a Go-kart 800 or 1200.

its an 800. the mounts are welded to the frame. i'll send a better pic when i can.

More pictures. Starting to think it’s not an mc91. Could be wrong though.

Looks like it might be a 49. Is the head a fixed head or bolted on ? 49 has a fixed head.

Seems fixed. still unsure about it being a 49. its what i thouht it was for a while but i looked at the IPLs and there were some pretty major differing factors in the shape of the block and outlines of some gaskets.

**edit**

did some mild research, i think it is a 49. found a 49 block on ebay thats identical to mine. maybe the one in the IPLs was of a different variation or had some minor misprints.
<img src="https://encrypted-tbn0.gstatic.com/imag ... p;usqp=CAU" alt="VINTAGE RACING GO KART NOS McCULLOCH MC49 BLOCK ENGINE CART MINIBIKE PART | eBay"/>

Is 4.9 cu in not 6.1. Smaller carb and less HP & RPM.

Now that i know what it actually is, how can i make more power?

Buy a 91 series engine and sell the 49'er would be cheaper in the long run.