You can certainly build a reliable 836 engine without needing hi performance con rods. However you will want to choose parts and approaches that are designed to make good power in the RPM ranges that the stock Rods will be reliable at. As RPMs go up, so does the stress on Conrods even if you are not making additional power. I am not certain of the limits of the stock rods so you might want to ask some experienced builders like MRieck or Jay from APE their thoughts. Basically you might want to go with a milder cam that will boost power in lower RPM ranges. Your bike will probably have better rideability as a result. . .
I had a true 750cc road racer (yoshimura 2 ring slipper pistons) ported head, cam, weber carbs, and I bent a rod, so it is possible for 836cc and less to bend a rod if the rest of the motor is hyper.
I would suggest that carbs and a cam will not be appreciated without a ported head. In fact, the ported head alone may be better than the carbs and cam without the ported head.
Unless one is really racing on a track where the rpms can be kept up, an 836cc motor will be more appreciated on the street set up for lower RPM torque ie a milder cam, which can use milder springs, like the stockers with shims, and the narrower carb throats like 29mm like already planned.
Just my thoughts and experience.
