#50 PostAuthor: Bevelhead » Sat Jun 06, 2020 11:58 am
With most of the parts arrived, the bottom end could go together, and with the heavy duty APE cylinder studs in place, the block could go on next. In the pic that was about to happen. With that done, attention turned to the head.. and more headaches..
The head is from a bike imported from the US, and its had a hard life. Some idiot in the past had used a too long bolt in one of the cam caps, which cracked the head immediately below the bolt. Once again, the damage had to be ground away and weld used to build up the area, before being shaped back to original (still not finished), see the pic with the arrow below. In addition a couple of the cam cap threads were damaged... a common problem it seems, so all sixteen threads will be heli-coiled.
But the problems don't end there... all the valves, valve guides are worn, and so will need replacing. While the valve seats will need to be recut too. Its all turning into an expensive rebuild. Though compared to Ducatis and Harleys the parts prices aren't to bad. Given the engine parts are around 40 years old, its not really a surprise they need so much work.
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