MOPED ARMY

I measured that one day, when I get home I will look, what are you doing anyways? simulation work? port timing?

i want to run reliable above 6500 rpm so i want to get a head start on the figuring first before i take the moby off the road for the winter and do some work. just thinking if someone has a engine already apart then maybe they have some numbers to crunch. I will post what ever is going on in case someone is interested.

At 6300rpm i get 47mph or 76kph with the dual variator so i need to get a bit more spin out of the engine to break over 50 mph without kitting and stay reliable. right now the ports are cleaned up and i have a tillotson hl which is running pretty good

wari wtf?

dual variator??

6300 rpm???

thats stock btw and goes about 30 on most mobys

the bike is reliable over 6300 rpm i run my engine all day well over that with a stock av7 crank

seriously confused here

6500 is just short of 50 and about where i want to run it is 6800 that will give me about 50mph so i would have reserve to 7500 or 55mph, 8000 would gimme just over 60. wanna just run all day at 50 actually. right now the WARIator sticks a little and throws the belt when you back off the throttle to sharp so i have to sort that out first.

I am with Bret.

47 mph on a strait?...no wind at your back? no port work?...you gotta be kidding........

Wanna see pix.....dual variator or not .....some kart/outboard/marine or snowmobile carb doesn't really cut it. What kind of gearing are you running?

Show the goods!

Mike

im skeptical.

That sounds like an intense set up. Please tell us more!

How did you make the back variator? What specs were you following and who made it for you? (unless you have some crazy machine shop at your access).

I was contemplating trying to rig up a rear variated pulley for my moby this winter.

"its this long, and this big around,"

wow that takes me back to middle school

wari tell us more of this double variator thing you got going on

what RPM does the rear variator start to open, hows the split go, where did you find such a thing, or where is your machineshop and why are you building this crazy shit?

crackstar

wow. thats impressive. is that all you're running? everything else stock? and youre going 47?

now i want it

no i dont have the keys to the fabulous incredible freak machine shop of anyones dreams really. down the road a ways is a retired engineer and he has a farmer metal working shop in his barn and garage. i do my own machining thank you. the driven pulley i made from a double pulley and a single one that were in the barn. just machined off the extra parts of the double pulley and nade the sliding half with the second pulley. then bolted it together with some springs to pinch the halfs together. you are right jess the outside opens and closes same as the variator so that the belt stays straight. also i use multiple springs so the it opens and closes evenly around. i just got the idea from a post here and looking at our old motoski snowmobile. the motoski has the same sort of thing for a double variator so it was basically easy. well except it binds up and that is getting me a little mad. sort of limited rescources because i have zero dollars so all my parts are what ever i can find in the barn or where ever for free. the engine i am running stock i just cleaned up the ports and set the ignition back because stock it is too advanced. i am also trying to run the HL on the engine butmaybe i will have to skip the wariator for a while until i can get the new carb working right.

so back to my original question, i guess no one has any measurments or specs on the engines?

from my calculations it is 84.5mm rod length

i dont have a helix to hold open the halfs of the driven pulley, i am thinking now that it binds from centrifical force of the belt because if you come off throttle slow it doesnt throw the belt or if you jam on the brakes it doesnt throw it only if you back off the throttle. have to find some more robust springs maybe.

thanx for the measurement jesse!

Usual thing if rod centers aren't known is to use 2 x stroke.

thats a clutch pully

i have one as does eric elk... and peter thats it in mopedarmy

basically it adds a real clutch to a moby and removes it from the crankshaft to the pully so the belt is always spinning even at idle

the clutch doesn't engauge till 5000 rpm so u can sit at the stop light and rev like a motorcycle lol

also it puts u into the powerband b4 the bike starts to move so u are already at 5000 rpm at like 3 mph and are at like 6000 at 15 mph 7000 at 25 etc...

long story short the take off on a bike like peters or mine will throw you off the back and continue to pull like this up to a top speed of 55mph.

take off unmatched (nothing comes even close) by any moped i have ever encountered so far except peters and brets but those are also superbecanes with similar setups both would agree

but i think wari is really on to somthing and i would love to see her bike in action... if i could put that setup on my bike with multiple times the hp of her stock bike i can't imagin the top speed.