engine build - slowly but surely

[Tim Miller]

Dick,

I do a fair amount of head work on the mill using www.new3acut.com cutting system, which is similar to Neway but with all 3 angles in one shot. By using the bounce spring under the cutting head it illuminates chatter when letting off the seat. Once you get the cutters setup it produces a perfect .050" wide seat everytime. It takes a little to indicate it all in but the results and concentricity are excellent! You might be able to sneak by with hand held T handle but deflection is more than likely. Of course when you pull a vacuum it will tell you that.

Myself being a machinist/welder I can really appreciate all the dedication and time that you put into your build. Thumbs up to you!

What's next?

Tim

[border0_3]

Hi Dick,

A superb job throughout and an awesome looking final product.

By the way what air filters did you fit?

Look forward to see any future projects.

Best regards

Richard

[Dick Eastman]

I wore out my HONDA broaches and just bought a set of New Way cutters.
They sure make new seats easy. ..................lm

Thanks, Graham.
I hope you realize I kept going back to your race bike shots for proportions and ideas! Also your restoration pics, esp your crank fixture.
Been building up another head - at the vapor honing now. If anyone does much head work, the New Way valve seat cutters work very well.

I am not surprised that you already have these!

[Dick Eastman]

I really like the New way cutters but You have to be careful not to remove too much metal

G


I agree - removed just enough to clean up the pitting.

[Dick Eastman]

Dick

I'm happy that I could be of help in a small way. The great thing about this forum is that we all get ideas and learn from eachother.

Sharing keeps the Forum alive.

G

Amen!

[Dick Eastman]

Dick,

I do a fair amount of head work on the mill using www.new3acut.com cutting system, which is similar to Neway but with all 3 angles in one shot. By using the bounce spring under the cutting head it illuminates chatter when letting off the seat. Once you get the cutters setup it produces a perfect .050" wide seat everytime. It takes a little to indicate it all in but the results and concentricity are excellent! You might be able to sneak by with hand held T handle but deflection is more than likely. Of course when you pull a vacuum it will tell you that.

Myself being a machinist/welder I can really appreciate all the dedication and time that you put into your build. Thumbs up to you!

What's next?

Tim

Do you set the cylinder head on an angle, or tilt the head of the machine?
T-handle deflection must be considered - for my finishing cuts, I would ink the seats with a Sharpie, and go a little more gingerly; having good valve guides are very important, as the guides bell out somewhat with use, and can affect how straight the cutter pilot is.
I agree, getting that .050" seat width with the New Way can involve reworking the 60 and 30 degree angles.
What's next? perhaps fitting a stock CB fender to the CX forks - don't like the gap I presently have, as the CX used a 3.25 x 19, and my front wheel/tire is the stock 2.75 x 18. The entire front end is CX 500, the steering stem, both clamps, tubes and lower forks. The steering stem/clamps fit the CB neck well, with only a slight spacer made to take up a slightly longer CX stem.

[Dick Eastman]

Hi Dick,

A superb job throughout and an awesome looking final product.

By the way what air filters did you fit?

Look forward to see any future projects.

Best regards

Richard

Thanks.
I used the K&N RC 1082 filters, that were advertised to fit the Yamaha RD 400; however, I had already OD bored the clamping surface of my stock carbs, so it was just a matter of making a pr of sleeves for the larger diameter of the filters. Some of the earlier pics of my engine show a smaller set of K&N's. These flowed 96 cfm, and my new larger ones flow 207 cfm each. I think the smaller ones would be fine, but I wanted the look of a larger filter.