Tax time build plans.

[oldsman]

With tax time coming up I have been thinking of a nice build.  What I am looking for out of my build is a strong long lasting engine capable of hitting 60 GPS MPH.
 The base for the build will be 50cc case. Case internals will be smoothed to aid in oil drain down. Oil passages will be drilled larger for more oil volume, oil pump inlet and output will be drilled according to passage size. Electric oil pressure gauge will be used.
 I will be using a 44mm stroked crank. I am thinking of sending it off to have it cryogenically frozen and stress relieved as  I do with racing cranks. This alone will make for a much stronger crank.
 I plan on going with a 52 mm bore. The crank will hold it and if my math  is correct I should be pushing close to 92cc. I plan on a 150 jetted carb or a 23mm cvk not sure yet. Full cvt modes with up gear and kelver belt.

I will not be running full throttle but I want to keep up with traffic and have fun doing it. Any thoughts and ideas would be helpful. As I said I'm in the planning stage right now so I am tossing around ideas.

[ryan]

run a flatside carb 24mm or 21mm you wont be dissapointed

[90GTVert]

Are you going to work the cylinder head or buy one? Either way, you should upgrade to larger valves. Scrappy, Hoca, NCY, and Naraku all sell big valve heads.

Might want to consider a camshaft. There aren't a whole lot of options there. I had an NCY "performance cam" with longer durations and very similar lift that helped. I think most go with the A9 that Scrappy and some others sell.

[kevin55950]

Look for Mikuni TM carbs. We ran those on our Mojave 250 ATV and they were a HUGE improvement compared to the stock CVK 34mm.

There's some 4 valve head available... might consider this option ? Autotech had some if I remember, might be worth an e-mail. If you have the budget, might take it to a shop who can make a good port and polish.

You can also play with intake length and cam to get the power where you want it.