Originally Posted by J.Filipow

FWD Motor Position Conversion Set (300943)

I looked into this front belt tension issues that some of you are reporting with the FWD Motor Conversion (This conversion uses 38T diff pulleys, as well as dedicated top decks and belts). With the standard (0) eccentric bearing holders, rear belt tension is normal; however, with the standard (0) eccentric bearing holders, the front belt IS excessively tight. So much so that I would hesitate to use this tuning option in spec or limited motor classes (17.5, 13.5, 105. etc) due to the tension. I have determined that correct front belt tension can be achieved by using optional (+1) eccentric bearing holders (part no. 302077) on the front diff pulley.

I hope that some of you will find this info helpful.