FOUND IT 390xp cylinder, top cover

[Woodwackr]

Trying to fix my friend's run-over 390. We need a good cylinder and a top cover.

Dang…20 lookers and zip, lol

 

[Woodwackr]

Trying to fix my friend's run-over 390. We need a good cylinder and a top cover.

Dang…20 lookers and zip, lol

Found a top on Dukes, need cyl

 

[farminkarman]

I’m assuming you want a used cylinder? I have NIB OEM p&c if you get desperate.

 

[Woodwackr]

I’m assuming you want a used cylinder? I have NIB OEM p&c if you get desperate.

Those are available for $310 from 3 different sources
The piston is fine, just need a good used cyl…have rings.

 

[farminkarman]

Those are available for $310 from 3 different sources
The piston is fine, just need a good used cyl…have rings.

I got one from before the price hikes. If you strike out finding a used one, shoot me a pm. FWIW, the Duke’s chrome 390 p&c is pretty nice. I think it would have run great out of the box, but I couldn’t help myself.

 

[Woodwackr]

I got one from before the price hikes. If you strike out finding a used one, shoot me a pm. FWIW, the Duke’s chrome 390 p&c is pretty nice. I think it would have run great out of the box, but I couldn’t help myself.

I was wondering about the Duke's kit. How do you think it compares to the Meteor?

 

[farminkarman]

I was wondering about the Duke's kit. How do you think it compares to the Meteor?

I haven’t put enough hours on the Duke’s kit to know how long it will last. The timing numbers on the Duke’s jug are good…maybe a little better than stock. You can also port the Duke’s cylinder without plating lifting from the cylinder wall. The meteor is more expensive, and will likely lose plating after a while.

 

[Woodwackr]

Wound up with Duke's chrome kit.
I cleaned up the casting goober and opened up the exhaust a tad then polished the exhaust port.
Interesting thing...
The piston in the kit is a tad shorter than the oe. If I use the oe piston I can't do a BGD as it is only .012 squish. Throw in the Duke's piston and I get a .019 with no gasket.
Hmm...
019 or .028?

 

[farminkarman]

Wound up with Duke's chrome kit.
I cleaned up the casting goober and opened up the exhaust a tad then polished the exhaust port.
Interesting thing...
The piston in the kit is a tad shorter than the oe. If I use the oe piston I can't do a BGD as it is only .012 squish. Throw in the Duke's piston and I get a .019 with no gasket.
Hmm...
019 or .028?

Leave the gasket out and run the 0.019” squish with the Duke’s piston.

 

[Woodwackr]

Leave the gasket out and run the 0.019” squish with the Duke’s piston.

Kinda where I was leaning. If I had a lathe...and the skills, it would be easy to make the oe piston work.

 

[Woodwackr]

Bevels were inconsistent, mainly around the transfers, a couple of minor bends in 2 fins, casting goober no worse than even some oe cylinders I've seen. Spent about 30min on it.

 

[Woodwackr]

After.
For the price it ain't bad.