[Chrislong]

The X-factory pulleys are all slightly out of round slightly.

The layshaft pulley is exagerated by the sides/belt guides being more so out of round. But this doesn't matter.

You can use two rear XX4 diff gears (one for the front) in the X-5, and you can use the XX4 layshaft gear (its actually the gear at front of the rear XX4 belt we use) in the X-5, but you'll find it changes the overall ratio.

There are a few people who just use the XX4 layshaft gear on the X-5 (reshimming the whole X-5 layshaft overwise there is a lot of play side to side).

Personally, I prefer the ratio which the X-factory gears give, and the slight inperfection in the shape cause's no ill effect that I have found.

If you are still worried, give Daryl at Lesro models a call as he can supply new gears manufactured to the same sizes as the X-factory gears but are perfectly round and central.

Chris