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Right on! Now enjoy the ride!

4, but I forgot to measure the stud spacing when I did the PDI. According to Scrappy's Tech Talk section, this engine has the standard jug, not sure about valve height, will measure everything next time I open it up.

Yep, thanks for the advice!

BTW- The washers for raising a non-adjustable needle you can get at any hardware store. Take your needle and diaphragm with you so you find one that has an inner diameter that fits all the way up the needle, and an outer diameter that will fit in the diaphragm. My 50cc can take a large washer in the diaphragm, my 150cc has a collar around the needle and can only take very small washers.

Alleyoop would you say there's a golden ratio? For instance, should the RPMs be reaching around 4k at halfway up the variator, 5-6k at 3/4, and 7-9k up to the top?

I've tuned my 50cc by feel, and have yet to do a variator travel test with a marker like I should have long ago. My new 150cc, I'm going to be ordering sliders for soon, and want to do the marker test first to see which way I should go. From there, I would like to fine tune it as you are suggesting, and after that I can adjust to my preferred feel as before, but this time know a proper base to be working from. BTW- the 150cc is staying between 3-5k on the below 45mph rides I've taken it on so far. What I'll be tuning for is a bit more low-mid range response to tide me over till I decide if I need a BBK, not worried about top end.

You might want to put a strip of rubber between those metal rods and the plastic case itself. That will prevent rattling and scraping sounds, and help even more to prevent cracking. I have the remnants of an old pair of fishing boots I cut rubber strips off of for just such purposes.

Looking forward to seeing the pics! You are definitely getting it done cheaper than most windshields. The cheapo universal windshield that connects to your rear view mirrors runs $35, and it's 1/8" at best (I have two mounted as one for extra thickness on my 50cc during the winter, they accidentally gave me two of the acrylic pieces when I bought it, lucky me), so you are definitely coming out ahead! Did you purchase a particular type of acrylic made for windshields, any coatings or treatments, or just a standard sheet?

I'll definitely be interested in what you work up, as you said, the stock one is a bit too short to provide much benefit, and I'm spoiled having the larger one on my 50cc during the winter.

One thing I'm thinking about modding is the under seat bucket. I don't like having to remove the battery to work on the engine. Once I replace the carb and stock air filter, and remove the emissions crap freeing up room, I think I'll cut the seat bucket just a bit behind the battery box, using the battery box screws to hold down the rear cut off portion. This way I can remove the rear 4/5 of the seat bucket without removing the seat or battery. This only makes a difference after removing the stock air filter and emissions crap, otherwise there still wouldn't be enough room to do anything, and even with this it will only make adjusting the carb easier.