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[Yellow09SERG]

That with the kit pistons?

Yes that is with the pistons from the kit.

Good catch, most do not even check.

Thanks Don,

Have built a few SBC/BBC over the years but this is my first trip into a Harley. Being unsure of myself in the Harley world I have tried to ask the questions that I didn't understand and double check even the things I THINK I understand. To much money in one of these to try and take short cuts especially when uneducated as I am in the HD world.

[barrhill]

Just an FYI for those of you that are or planning on a drop in 117 kit with a set of 2.12 valves. Be sure to check your valve to piston clearance.  Not using a big cam...... .188 @ TDC and it was next to touching outside of valve relief

mine did also hit steve had to machine pistons

[BADRDE]

mine did also hit steve had to machine pistons

So Steve put the 2.120 in and ported your heads? Or just changed the valve? Did you have the heads milled .030-.050" also?

[Yellow09SERG]

So Steve put the 2.120 in and ported your heads? Or just changed the valve? Did you have the heads milled .030-.050" also?

The heads in the picture only had .022 removed from them

[Yellow09SERG]

Well.... bike is back together except for the rear rocker arms  and up. Ordered a 1/2" and 7/16" torque adapters today from Granger and the should be here Tuesday. Maybe by the weekend it will be ready to heat cycle and head to a tuner.

[Texas 103]

Well.... bike is back together except for the rear rocker arms  and up. Ordered a 1/2" and 7/16" torque adapters today from Granger and the should be here Tuesday. Maybe by the weekend it will be ready to heat cycle and head to a tuner.

I'm right behind you...Tom going to start on mine tomorrow. Hopefully done my Wed 4-5 heat cycles, off to Ed's for a tune

[GMR-PERFORMANCE]

It was not a depth issue just a very small valve pocket relief.. And even with a 2.080 there is not a ton of room with MINOR head decking.. Not sure why they did it this way but for what ever reason they did,.... these need to be checked each and every time.. even with what small cams small head machining etc.   I have another here now that is going to gether and it had a 2.080 valve and the cam is not big at all 192 tdc  and its close on one piston the other has more than enough room. 

[MrSurly]

I have a question about method; what procedure do you guys use to establish lifter "pump up" or lifter-plunger position when doing a static clay check for valve to piston clearance? Are you adjusting the pushrods longer to compensate for lifter collapse? What if the build was using stock pushrods, how would you address this?  Mechanical compensation or just math on the tolerances?

[GMR-PERFORMANCE]

I do not use the lifters at all.. You can turn the lifter into a solid and use it that way. But that is still more work. Set the head on without valve springs and measure off the valve from closed to contact on the piston.

[Snakepit]

  As a general rule, the closest point of piston to valve
clearance during the rotation of an engine is between 15 degrees and 5 degrees before top dead center
overlap for the exhaust valve and between 5 degrees and 15 degrees after top dead center overlap for
the intake valve.

[MrSurly]

  As a general rule, the closest point of piston to valve
clearance during the rotation of an engine is between 15 degrees and 5 degrees before top dead center
overlap for the exhaust valve and between 5 degrees and 15 degrees after top dead center overlap for
the intake valve.

You've stated why I asked the question; how to measure valve clearance dynamically to be able to check for issues that are going to be specific to a given cam/piston combo. So, how do *you* do it? Degree wheel and math at numerous points?

[Snakepit]

Yes...a degree wheel and multiple measurements. The good thing about using the clay also is seeing how close that valve is to the pocket. (which you could flycut if needed.)

[GMR-PERFORMANCE]

use clay but with just pushing the valve down by hand

[jermwhl]

I just ordered my kit today.  I've been eyeballing this kit for MONTHS.  Finally decided to pull the trigger.  Can't wait.

[kjobe111]

I've got mine