The 1978 YZ 125E 2K6 has a pipe all on its own, The silencer is the same as a 125d.

Motor paint on

Paint preperation cylinder and head

Ok here is one of those time consuming jobs that must be wright. After making sure the bore is within clearance's and all gasket surfaces are A1, then the paint stripper can go on.
The best and fastest way for these is to paint strip them and clean up with hot water pressure washer.
Once the desired finish is achieved with the stripper, then you can bead blast. After bead blasting make sure a washing in grease remover is applied we use a paint brush for application and then blow dry with compressed air.
Bring all parts up to temperature with drying lights. Apply paint directly to the cylinder no primmer Acrylic lacquer and two pack both will do. We are using a semi gloss 2 pak.
Apply 4 coats or until covered.

Assembly under way.

Point of interest the swing arm on these models are finished in a MAT silver metallic. Form factory there was no primmer as usual all component manufactures seem to use a two pack etch primmer as there finished coat,why you may ask CHEAP thats why.

There are a few chain rollers on this model 5 in total. The plastic mud guard on 2k6 is different to that of YZ D 1W1 they are similar and can be retro fitted.

NOS Parts fitted,
All chain rollers.
All swing arm bearings.
All seals on swing arm.
Pivot Bolt nut and washer.
Mud deflector and CDI holder.
CDI Box.
Handle Bars
Spark plug cap