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British Bikes / Re: Troubleshooting a JAP Special
« Last post by Rockburner on January 30, 2026, 10:56:14 AM »If anyone has been following this, I'm sorry for the hiatus: I lost my password and, for various reasons, couldn't retrieve it.... But I'm back now. 
To continue....

The old head is slowly cleaning up. I resorted to violence last night (with the dental pick).
Old photo for comparison:


bzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

They might not look it, but they're a lot cleaner!
Did the valves and springs in petrol, and the rest in paraffin (the only 2 solvents I had in).
Will get most of the rest of the components cleaned up as I start reassembly, once the crank is done. Off to Ipswich next weekend for that.

To continue....

The old head is slowly cleaning up. I resorted to violence last night (with the dental pick).
Old photo for comparison:


bzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

They might not look it, but they're a lot cleaner!
Did the valves and springs in petrol, and the rest in paraffin (the only 2 solvents I had in).
Will get most of the rest of the components cleaned up as I start reassembly, once the crank is done. Off to Ipswich next weekend for that.
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