Originally Posted by
jensroland
How often is it nessessary to change the conrod in a Speed 21 XZ-R. After break-in? every 4-5 gallons? or are there any other directions?
Best wishes; Jens
I would change the rod every gallon of hard racing. You can go more, but it's not worth it.
If your not pushing the limits, you can go 2-3 gallons with no problems. Although there are always exceptions.
No need to change the rod after break in.