MOPED ARMY

lots of kits available and check dereks custom pocket bike pipe review.

I assume you are refuring to a posting in one of the forums. I have searched but can not find it. I dis find a place to get replacement headlights but not much more. I may buy a performance pipe for some other moped and weld it to my header pipe. Problem is I dont want a super loud one. Gotta keep the neighbors happy

Quit bragging Tate.

the spree head is an excellent thing to do, took me from 25 to 32 actually. i also removed my air filter.

you could also do what i did for one day, and run rc car nitro. i was peaking around 45. this was before the spree head.

Ed,, don't you run lean as hell without your filter and the new head? I know mine is running pretty hot as it is. Did you upjet? If so, lemme know where you can get jets for these, or if I should just go ahead and waller it out a bit. Also, did you use a head gasket or no? It looks like there is almost one built into the spree head, but I donno.

Im gonna try the spree head tonight i have one...what year works though? cause 84 piston was domed and the 85-87 piston was dished...the heads are different...which one you guys running?

A pipe and uni-pod filter are the easiest way to make these faster.

The spree head (I think the domed one, not sure, the squish band is domed) will up the compression; but I've found that it's not worth it as it blocks the flow of air across the cylinder fins, it's fins are set-up for forced air, and the increased compression leads to heat fade on any ride longer then 10 miles, you need to run a 5-7 plug. Not worth the gain IMO; I've gone back to a stock head on my fast bike,

That twin pipe linked above works great on the 2 speeds, sucks ball on the 1 speed, the power band is too high for the one speed to take advantage of it at a usable RPM.

Nitro will eventually kill your engine.

I have 2 real nice spree heads if anyone wants one, $20 shipped each. I also have 1 Proma Lowboy (polymer) (only pipe that was made to bolt up to the NC/NA/NU without loosing the stand) that I'd be willing to sell.

I hate to say it, but QT's are generally faster then NC's.

Just an FYI, I thought I had the fastest express in the US, but this weekend I was proven wrong. There is a person is South Dakota that will never post here that has made a NC50 that will do 50+ on a stock cylinder w/custom head, pipe (8p replica), and custom water cut GEARS. Yes you read that right, he has managed to do what was thought to be impossible and has made his own final drive gear; he's clearly too smart fot his own good.

what pocket pipe do you recommend for the express? I already have the dual exhaust one on the way but if there is another similarly priced one I would rather not waste my time/stock header if its not gonna be worth it. there is a one silencer model for the same price, looks like same expansion chamber, let me know if that will do. Also, what would you need for the polymer, although I'm sure I couldn't afford it, and yes, like I said, 86 or newer on the spree head if you choose to do that. Should I add some octane booster considering the upped compression, or is it not high enough to matter?

Well, it seems you know what your talking about so I reckin I'll order one. Also, If I just took some uni foam, you know, the stuff that comes in the plastic sleeve with the cardboard on top, would that have the same flow characteristics as the pod filter? I think I have some uni foam laying around, but I donno if its the same porosity. I figure I could just wrap that around the original intake, and If that doesn't work I will just use some pantyhose, stretched nice and thin.

Don't give up. My 77 express with a foam filter(ziptied on) and Tomos Techno Circuit cut and welded to the stock header goes 35mph (gps verified on flat ground). I tried the pocket bike pipe first and the low end sucked but it would hit like 32. With the Techno Circuit it has decent low end and good midrange/top end.

What do you guys think of a high-flow k&n style filter instead of the stock air filter? Would it be Better or Worse? Whats the best kind of air filter for the NC50?

Don't get that pocket bike filter, the cone is too small and will cause 4-stroking at WOT plus the opening is the size of a Del 14/14 so like 2.5", they express has a 7/8" opening; just spend the extra $10 and get a 1" uni-pod.

Oh yeah, is there diff between this

http://cgi.ebay.com/ebaymotors/UNI-PERFORMANCE-AIR-FILTER-1-x-3-HGT-POD-FILTER_W0QQcmdZViewItemQQ_trksidZp1638Q2em118Q2el1247QQcategoryZ107070QQihZ013QQitemZ230283936822QQrdZ1QQsspagenameZWD1V

and this

http://cgi.ebay.com/ebaymotors/Uni-2-Stage-Dual-Layer-Pod-Straight-Filter-UP-4112ST_W0QQcmdZViewItemQQcategoryZ35620QQihZ001QQitemZ110287725378QQrdZ1QQsspagenameZWDVW

Performance wise?

Those are the ones you want. I use the first one, and would recommend it over the other. 3" is the good one, 2" is the shorty one.

The red one would be more suited for off-road ridding but will work just fine (it'll just be bigger and red and might be able to flow better while very dirty).

Also, I know this is going to make me sound stupid, but how do I go about increasing my exhaust duration?