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Weldangrind · 12-13-2016, 12:24 PM

I was recently trying to drill out a slow jet with a 61-80 numbered drill set (and a pin vise), when it all went pear shaped on me. I couldn't make any sense out of what was happening with the motor, since it was behaving like it was getting way more fuel than I was providing. It hit me a few days later; the drill bits were incorrect from the factory. I had drilled the jet out way too far.

I took each bit out and measured with a vernier, and discovered that of the 19 bits in the index, I only had six sizes (which were triplicated). I've learned to measure the bit before I happily drill away, so I don't unwittingly go too far.

I didn't think I'd have any success in filling a slow jet with solder. Since I had another virginal jet, I drilled it to the correct size (according to Mr.Vernier) and the motor was happy.

12-13-2016, 12:24 PM	#29
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	I was recently trying to drill out a slow jet with a 61-80 numbered drill set (and a pin vise), when it all went pear shaped on me. I couldn't make any sense out of what was happening with the motor, since it was behaving like it was getting way more fuel than I was providing. It hit me a few days later; the drill bits were incorrect from the factory. I had drilled the jet out way too far. I took each bit out and measured with a vernier, and discovered that of the 19 bits in the index, I only had six sizes (which were triplicated). I've learned to measure the bit before I happily drill away, so I don't unwittingly go too far. I didn't think I'd have any success in filling a slow jet with solder. Since I had another virginal jet, I drilled it to the correct size (according to Mr.Vernier) and the motor was happy. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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