my zx50 issues

[thebatman]

well see zombie, id like to STAY at LEAST 50mph.. cant wait till a "good day" so i see if  what gain so far..windy, rainy spots sux. cant wait till i get mail.NOTHIN TODAY EITHER. tried callin yesterday but no answer.. is that guy in parts at malossi reliable?

[zombie]

Malossi usa on line? They are great w/ all my orders. I have heard they have jerked some others around, but so far they are my first choice for malossi parts. I ordered my belt yesterday, and wanted it next day. It was too late to get it done w/ the holiday so they are sending it next day on tues. for no extra shipping cost. ($45.00 for next day)

[thebatman]

yeah, i ordered it like last tues. but it was being sent out fri. still not here. the ramp plate came from hawaii...lmao

[zombie]

You most likely won't see it till wend.-thurs.

[thebatman]

thats great. 2 weeks....    so what kind of tuning can i do to my motor... seen you all discuss spacers and such but hadnt really studied or understand the concept, etc.

[zombie]

Look up the latest posts for today. Sid shows two port maps of the same jug. The first is w/ the jug installed as most are on the crank case. the second shows the same jug w/ a spacer under the jug to get the port heights correct. The line thru both maps is the piston at bottom dead center. Shaka need to adjust his jug in the same fashion.

[wordslinger]

..it's more involved than just spacers and squish...

[thebatman]

yeah, i uh just looked at that from sid... yeah, im lost..no clue about those numbers or the map... guess the cage and jet carb/bigger carb will be the end.. hope ill get constant 50 from it

[wordslinger]

..it'll be very hard to get a "constant" 50 from stock...

[thebatman]

i got a taste of 50+ with this scooter before.. surely i can beat the 45-48 avg. ( think the 1500 main helped that too)... (the 50+).     dam, i keep gettin beat down on my brainfarts....

[wordslinger]

Insert Quote
i got a taste of 50+ with this scooter before..
..tasted good didn it....

..i hear y' man....

 

[sidthesloth]

Hey thebatman, those numbers on the port maps are the distance in mm from the top of the barrel to the top of the ports, I know, my scrawls are not too good, in fact, my wife calls them chicken scratches, but hey, that's life. You shouldn't need to adjust the height of your cylinder, it should be correct from the factory, I bought a cheapy off ebay so that was what I had to work with. With your cdi derestricted you will get 50 but she will be SCREAMING.

[wordslinger]

but she will be SCREAMING

...like it when that happens.......

[Shaka]

If you really want to do some fine tuning to your stock engine you have to start reading through some posts on Scooter Invasion.  I'd also recommend reading Gordon Jennings Two-Stroke Tuners Handbook and Bell's Two-Stroke Performance Tuning!  There are links on this site to pdf files of the books.  They are very good books and IMHO required reading if you're serious about 2T tuning! 

All you may need to do on the stock engine is match the cylinder to the crankcase.  You just have to grind the transfer tunnels to match so the flow is smooth from the bottom end all the way through into the combustion chamber.  I know my crankcase was pretty poorly matched ever to the stock cylinder.  My boost port tunnel was way off!  There was also a slight mis-alignment between the two halves of the crankcase which I evened out.  You shouldn't really have to do anything to the ports themselves though.  It's pretty risky to port the inside of the cylinder also.  One slip and bye bye cylinder!  There is not much risk involved in matching things up and smoothing them out, other than getting metal shavings down inside the crankcase!

Ps. I got a new project!  It's a 587cc 2T that goes in the water!!!!!!

[wordslinger]

..itsa stock engine he tuning...