Carby Tuning advice for Keihin carb

[DieselTech]

For your hi-compression to be right & optimal, you need the dished out area of the cylinder head to be the same diameter as the cylinder bore.

 

[noah9988]

Is there something I can do about it? Should I sand off that ring if I have the clearance? Get a different head?

 

[Wrench]

I'm not a 2 stroke guy but...
Gotta match the ring ID with the cyl buy using the piston and sandpaper.

There's a technique for that

 

[DieselTech]

Can you get me pictures of the bottom of cylinder head your going to use, as well as the head gasket you are going to use? That would help alot.

 

[DieselTech]

Does the bottom of your cylinder head look like this one

 

[DieselTech]

The top picture is after I cut my cylinder head to my 49mm bore, the bottom picture is before I cut the cylinder head for my 49mm bore. Bottom picture is as it was sold/stock for a 47mm bore.

 

[noah9988]

Picture 1: Piston at tdc with gasket
2: Bottom of the head, you can see where it seals
3: How the gasket goes
4. You can see that it's raised up
5: Piston at tdc without gasket
6: Measurement of the head
7: Measurement of the gasket.

 

[DieselTech]

That 41.41mm measurement on your hi-compression head needs to be increased to at least 47mm or the cylinder bore diameter. That's where your running into problems.

 

[DieselTech]

Is your bore diameter 47mm or 49 mm

 

[noah9988]

It's 47.