But after some grinding and machining, the old lightened ones are saved, let's just hope they don't break.
Compared to the originals you can clearly see the weightloss, about 5 grams per rocker.
And then of course I also had to lighten the rest of the parts for the real racing feeling. lightened the valves by about 2 grams and valve spring retainers also lost 2 grams each.
Installed in a nice clean head:
The cylinder it will go on, 45mm bigbore, I suspect it to be a modified CD125 piston in 4th oversize, I bought the kit as is.
Headgasket needed to be changed because of the bigger bore, so the inner diameter is a bit bigger then the one that was in the gasketkit, but also the thickness was increased to lower compression to about 10,3:1
With the bigbore kit, the original compression of 9,5:1 would have been raised to 11,5:1 when using an original headgasket, this is a bit much with modern 95 octane fuels at the pump.
This is the result of today, a finished engine, so far.
All bolts have been replced with original cross heads, and all parts I had are mounted. Still need some oilseals and a few bolts for the headcover to complete this, and would like an ignition with cover, but I could take that off my other engine for now.
The oil-line goes directly from the engine to the head, not through the carb, as I might mount a different style carb to this motor at some point.
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