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I know it’s been a while, but I do have a small update. Kart hit 5900 rpm at 6k and it still had some left to go. I don’t have that long of a straight so I’m afraid to gun it all the way😂😂 attached image of spark plug. Still lean on the idle jet, plug looking slightly toasted. I’m gonna try...

I have a hunch that since I sanded down the bottom of the rocker support, now it’s not completely flat. So when it expands it tilts to one side. But hope it’s not the lobe going.

I’ve had problems with my valve lash when taking it out for tuning, and I also notice a ticking sound after the engine warms up a bit. Whenever I set the lash to .003” both sides after it warms up exhaust side goes to 0 and intake to .007” ☹️🤔. Definitely not good for my cam if it’s sitting...

My current carb never gets carbon on the threads of my spark plugs

I have the .02” low speed jet as far as I remember, which is probably not enough. I was just turning the air-fuel out almost ALL the way before the engine gave out way back when. And it didn’t smoke or nothing. And the plug was lean on idle...

Took her round for a spin and she still got that crazy high and mid range, low range still missing a little Like last time. max rpm 5500, I didn’t try anything crazy jus yet, plus I ram out of spark plugs to read so I got to wait on new ones coming in to really dial it in. while changing out...

😂😂I got it couple weeks ago, on go power sports. Cheapest one I found, and on the FRONT page. That must be why I was wondering if exhaust scavenging also applies for these motors, maybe I could try and do some research, and cut it to length. 🤷‍♂️ not like I have a dyno lying around

Break in complete! She started right up! Checked re checked rechecked valve lash. I did notice while breaking in and doing that, there was copper specs from my headgasket on valve cover which I spray on, hopefully that gets washed out with beak in. And doesn’t clog the oil artery In the con...

Alright I went ahead and jus switched over to champion rockers, much less to worry about. They make quite an angle compared to the old ones. Had to go back to the stock length pushrods, thicker lash caps I ground down the base a little bit, and got the rockers to hit the lash caps straight in...

Those look like some nice rockers without breaking the bank like some of the others. I calculated that 1.333 ratio would get me right on coil bind. I can’t find any other good options besides a stock style stamped rocker arm on 1.3:1 ratio. But I’m afraid that’s getting real close to max coil...

How would you check that? It’s kinda hard to see. I tried marking out the edge with a sharpie with no luck

This is exhaust rocker arm on stock pushrods And this one is same setup just with -.04” pushrod. Hopefully you can see it’s at a bit of an abgle Possible coil bind? Intake side before(Stock pushrod) and after (-.04”) Possible coil bind on intake side Exhaust porting job . It could be...

I got some work done on the valve train, and also finished off the exhaust porting. The valve train photos are stock length valves, shorter -.04” pushrods, thin light lash caps. AND also same setup but stock pushrods Installed height on the exhaust is already at .840” when I need to be around...

Hmmm no nothing on the retainer, valve got a good whacking 😂 but the stem looked fine otherwise. Spring broke right in the middle, this all happened on the exhaust side. That stud was bent a good 3, 4 degree. Actually I rolled the stud on the intake side on a flat surface to check if it was...

!! NUMBERS !! Alright I got an update, put in new piston with ring end gaps top is .012 bottom is .013 so almost perfect 👍 best I’ve gotten so far. Deck height being .024(all in inches) 16cc displacement with plug and valves in, giving me a CR of ~~9.8:1 with my current .009” head gasket...

I think I cleared out the right side a lil too deep but I see I managed to get that funneled look for both. I cleared out a little bit of the wall on either side so that the air has a straight shot. I just want to be careful not to remove too much, though I might have gotten a too crazy with the...

Did a little tweaking on the intake side, here’s what I got:

Alright so there should be a lip at the end near the bowl area. I got an image, the red line is the edge, and where the slop finishes, and it set farther back so that the blue lines which slopes up to it is more gradual. Should that edge curve back again, or do you think it’s better to have a...

I went ahead and just blending the port to bowl transition on my new 14cc head. On the short turns and next to the valve guide, and then the bowl to valve as well. Didn’t take too much out. What sort of bit should I use to “smooth” out the intake? on a different older thread I saw @bob58o using...

I already got the old ones, should I put them in the “for later” bag?