MOPED ARMY

it caused nothing but trouble for me on my stock cylinder. it only helped way up on the top end, but i almost never got there because of the huge bogging and dreckish low end it gave me. others have said they liked it on their stock cylinder, but my experience was definitely bad.

on a kit, however, it is incredible.

No it is so awsome. I put it on my stock 20mph cylinder and it got me 15mph easy

J/K. Listen to them^

In my limited experience, a stock cylinder with an expansion pipe will only produce decent low end with a VERY light clutch. That was my experience adding a polini 'top one' to my 103 --which was non-variated, so the belt I had was small, and kept the gear ratio to the full variated position... or the position worst for low-end.

The stock 103 engine + top one is not as drastic of a pairing as a moby stock and the huge ninja g3 (especially seeing as how moby's are heavier and usually have shittier low end anyway), but it still killed my low end until I removed half the weight from my clutch.

We're still waiting on julian to post a wiki about lightening the moby clutch pads, but when I was bothering Elliot a bunch about my moby a while back, he never suggested it, which makes me assume it's still a bit more experimental or perhaps doesn't produce drastic results?

As a matter of fact, Elliot ported my cylinder moderately and recommended a ninja and var plus.. without even suggesting I shave off the clutch pads, so maybe there's something to the ninja+stock.... however I'm pretty happy saving $200+ and my kickstand, especially cruising around SF I never get to blast full speed for long anyways.

wiki is a great guide on porting.

The slow cylinder has the most potential for the least amount of work (the transfers windows are amost twice as wide saving a lot of nearly impossible work)

My first engine was a ''B'' and with just work on the intake and exhaust and ''devil horns'' I was able to break 50 with the 10mm gurtner and homemade variating tuned pipe.

Now I have a heavily ported fast cylinder with a 14-14 and struggle to get to 50 but I have great low end...

Great info. I looked at the porting wiki. Was it a perfect oval or rounded edges? My intake/exhaust ports are rounded out rectangles. To port all you do is dremel out the 3mm or whatever, & thats it?

I have a puch as well. For some reason I can wrap my head around the moby better, maybe cause I can see all the workings.

Thanks

i went rounded edges. i think perfect oval would be a bit hard. but yes, dremel out the inside window to whatever dimension it says. then lead that gradually back to the outside window, so that it matches with whatever your intake is like. get me? make sure you chamfer your edges real good and make sure it is all surgically clean before you put it all back together.

Yeah i get it. Start the inside window (entering cylinder) then trim out to match my intake(intake to carb) I dont have an intake yet, so Ill have to wait till I get the shorty. So basically its a 1/2 inch thickness from the intake to cylinder that you have to work with. Cha?