One of the downsides given your sons age is I would have thought it would be phenomenally expensive, if not impossible, to insure when he is old enough to ride it.
Both my daughter and son had scooters at 16 but I would have preferred them to have geared bikes like an old Yam DT50 but when I looked into insurance the price hike was huge if you steered away from the norm.
It wont be going on the road, possibly a show or two if its good enoughI'd suspect that as a school project that it's not going to be used on the road. The complications of the learner system combined with punitive insurance values mean that by the time the lad is old enough and rich enough to ride it his interests will have moved on.
]Have you checked the engine number to see if it is a C15 engine?
Thanks, he has already said he wants it longerIf you make it bolt on, and lather decide to put it on the road you wont need an sva test as the origional frame look wont be classes as modified, it will collect enough points to keep its origional reg number.
For a bolt on hard tail fir that, id use inch tube probably 12 gauge. 8 mm axle plates. If you going to do a bolt on hard tail, id suggest about 4 inches of stretch, and if possible lower it. But say 2 inches.
Youll need to make a new oil tank too. What your looking for is a line as straight as possible from the rear axle to the steering head. If you bin the lights too, gives a cleaner look.
This is lying in the corner of my shed waiting for attention. Needs the forks shortening a bit
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WE cant find an engine number its in none of the usual places but the general opinion is its a 1965/66 C15F
]View attachment 76603
My C15T was stamped here.
Check the stroke when if you take it apart, might be a 350 B40 engine.