For the uninitiated LZ of course means Laverda-Zundapp, LH means Laverda- Husqvarna. As far as I know Laverda never made a specific scrambler/motocross or indeed a trials bike. Laverda specialised in enduro and regolarita machines. In the sixties the definition between scramblers and other off roaders was a bit more blurred and examples of the both the 100cc Regolarita machines and the later 125cc four strokes did appear in scrambles type events in Italy.
Glenn, the Chott yokes won't necessarily sharpen up your steering, they will simply reduce the offset and increase the trail which will provide more high speed stability. In theory your steering could become slightly heavier because you will have introduced a stronger self centreing tendency. In practice this doesn't happen on the 500s, I suspect this is because the reduced offset also reduces the wheel base by a small amount and this could help quicken the steering counteracting the deadening effect of the increased trail.
The standard F500/Alpino/Montjuic yokes have a large offset which gives a trail of around 72mm [I haven't got my notes handy but I know it's in this ballpark] This is the sort of measurement you'd find on a grasstrack bike, a genre of machine not renowned for stability! When the F500s competed on the Island in the early 80s some riders complained of instability at high speed and Spondon offered yokes which Slaters fitted to the team bikes and later offered as an option to customers. Originally these yokes were fabricated from steel and later ones were alloy. I have a set of the original Spondon alloy yokes and the offset is 22mm which provides a healthy 100mm [give or take a couple of mm] of trail.
I'd heard of the 2TR yoke mod but didn't realise the yoke centres were narrower. As Phil says this could create a clearance and lock problem , especially if you are using clip ons. You might need to move the tank back to give a sensible clearance for road use. Having a restricted lock can be a royal pain in the arse , even on a racer, and should be avoided if possible. You'll curse it every time you try to park the bike in a limited space, move it around the garage or try to load it in a van.
