ahell

Pictures with some new plastics

Ergal front axle 150grs lighter than steel.

I have a set of purple mudguards. Just need a white 2k paint job and stickers. And a amazing new seat !

New head, perfect condition.

Here's my assessment of this engine. It's not pretty. Low engine oil (in the engine compartment, not the gearbox, I should clarify, because it's separate on this model). The white timing chain guide is starting to melt in small pieces (which end up in the oil strainer). Engine overheating... blown head gasket... no coolant... burnt oil getting into the cooling system... fantastic! Well, This engine is built like a tank! There is some wear, but frankly, it's very surprising how little there is. The crankshaft bearings have some play, but they don't make any noise. The connecting rod big end has no play at all... but the small end shows significant wear without any material being torn away. The piston pin is still within tolerances. No discoloration from overheating or any apparent defects. The piston is out of order, but without any signs of seizing. The cylinder is good. A quick hone for the occasion, but nothing more. (phew, €€€) The cylinder head needs checking. I have a broken screw in a thread that's causing me a problem. Another used cylinder head is arriving, and I'll take the opportunity to rework the ports because there are some significant steps. Valve stem seals will be replaced, and the valve seats will be checked. The rocker arms are good, the camshaft is perfect, as are its bearings. Considering the conditions this engine has run in, it's a miracle it's not destroyed. The reason? It's an engine derived from a motocross engine, so it's oversized for trials use in many respects. I'm going to rebuild it properly with a new cylinder head, connecting rod, piston, bearings, and gaskets, and that will be a great chapter in this motorcycle's history!

A new conrod is coming. To much gap for the piston axle.

It's time to see what's going on this engine. Cameshaft and bearings perfect Cylinder rock solid! Perfect ! Piston very worn but nicely worn 😅 The crankshaft need new bearings New timing chain and new white guide needed. Good news. And because it's a 250 cc, parts are less expensive than 260 / 300 / 301 !