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Probably because the MK2 lacks the crank stuffers so the crankcase compression isn't as strong as the MK1. They still don't like more than stock blowdown.

40g 4-1/2 Walter zirconia flap wheel on a corded angle grinder... I got better things to do than waste time sharpening lawn blades.

You don't want to read the chamfer on the port opening numbers, you want when the port roof will open. Some people use a really thin feeler gauge and read right when it's bending into the chamfer. With the exhaust so high you'll want to raise the transfer to support it. Strato saws, with the...

Is that an 046 D chamber with the spark plug insert?

I usually put the transfers at 123° duration on the primary (exhaust side), 122° on the secondary and I keep the entry angle pretty flat. Yes, after 0.040" out of the squish I usually don't touch the opening of the intake.

No crank stuffers! 👎

That hole is right next to a seam which is probably glued so welding is probably not an option as you'll burn the glue out.

I had one AM 395 carb that required some drilling of the low speed circuit to get it to run right. It was always lean at idle no matter the screw setting and therefor didn't accelerate worth a darn. I might have had to lower the pop off pressure too to get it to supply enough fuel at full...

Are you looking to fit a bigger carb in the Dolmar 9000? Because those intake boots are pretty restrictive.

I modify the original arm and then make a few components for it all to work. Probably around $250 with return shipping.

Yup, I can modify those old Simington 450's so they have a vertical and horizontal adjustment.

There are almost no non chrome ring options in the 1mm thickness. Replacement chrome rings can be ordered directly from Wiseco. https://www.wiseco.com/product-category/powersports/pistons-powersports/piston-components/ring-set/

Yes, mainly the coil but the autotune seems to start to add fuel right around the rpm limit.

The autotune and the limited coil on the Husky 592 hold it back tremendously.

It's probably obvious but it's the Husky 395 for me.

I've done some that way, they are extremely loud and harsh sounding. They seem to favor less ex duration than just a big hole out the front.

Here is the Silvey P&D I have. I made the 510 style table for it so you can grind regular chain with it as well.

I think you meant to say annealed it. Heat it up, hold it for a bit, and then let cool very slowly to remove and hardening.

I have a Silvey P&D with the arched table I'd sell.

Because it is! It's common to modify a 288 chain brake cover to fit a 2100.