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So i blew a belt today and after inspecting the damage there was crap ton of black powder, i'm guessing belt and clutch material witch seems semi normal from the 139qmbs that have ever looked at. there was also some drive belt fraying it looked like tender just few small dust bunny sizes about few cm in diameter not to dense.

the belt lasted for some time a year or 2 so i'm not convinced i have one of those scoots that has that problem of them breaking to much. i was gonna open up the clutch area on the CVT a little bit i think it was this or scooter rebels that had some people whole sawing the bit of cover that goes over the clutch bell, i was gonna do something a bit similar but, not as big of a hole i was gonna do 2 smaller holes just encase of rain or road debree. actually i might describe it as cutting out 2 slots.

i also wanted to know about this...

enviromoto.ecrater.com/p/4703356/ncy-performance-variator-teflon-coated

i've been thinking about getting one for a while. are they snake oil like the hot rod CDIs and coils? i tried one of the scrappy dog scooters cams it made it run 10 whole mph slower but it gained 1k rpm on the top end. i also tried a CDI it didn't do crap it made things run worse stock and with the crumby cam.

so i'm bit weary about some of these after market parts and was curious if any one know about this one.

also on the front end, my forks is there any maintenance i need to do?

is the black dust and small bits of frayed CTV belt normal?

EDIT: Would this clutch bell help to keep things cooler specially with my slot mod

enviromoto.ecrater.com/p/6055776/ncy-139qmb-gy6-50cc-performance

i was also wondering about this would this be any more efficient then my current CVT? would it have a higher top end ratio. I'm maxing out my stock CVT on some of the down hills

enviromoto.ecrater.com/p/6055029/ncy-139qmb-transmission-kit

Well i got this scooter for a free after some drunk dude wrecked it after driving it cause he had a DUI (lol). My friend used to sell them and had this one in pieces in a trailer, we got to talking once and he said out of all the pallets he sold no 2 ran the same.

Any who some times the best power is the power you make your self. My friend has so many hours in his zx12 engine, your head would spin. He once spent 23 hours straight in shop working on it. are you gonna to do an engine for 23 hours !?!?!? well he took 5 pounds of moving weight out of the engine, or was it mostly moving weight . Either way you can pull a Burt Monroe and balance and cut down and port and grind your own stuff and you just might surprised.

Now i'm not gonna mold my own piston or any tihng. I think I'll order from JE for that. Um i was wondering if you had any success with any mods? Does any one know any good carbs? i was gonna ask on my minibike forums they know a lot about those Mikunis and Yoshimuras, I just don't want carb all that bigger than whats on it other wise you lose bottom end.

So as far as the piston and compressions i got to thinking about this 44mm 60cc jug,

www.scrappydogscooters.com/139QMB_50cc_Performance.html

if you look at other kits, you need or it's said it's best matched with a performance head of the same CCs. So i was thinking there is a good chance the outer diameter of the piston could hit the outer edge or ring on the stock head witch would be bad but, is also good that means you can flare it out at the correct angle you need witch could help with the compression and or if you get a custom piston it can be cut to fit the ridge or if you have it flared already you could bring the dome out on the piston for better flame travel.

So i guess I'm probably rambling more than any one cares to read?

I haven't ridden a gy6 yet with a working gas gauge.

Well scrapy dogs doesn't really mention the lift witch is kinda wierd is guess. Also sssssaaaaaaaaaayyyyyyyy tell me more about this head and cam it wouldn't be the one they use the Jonway VIP scoots is it? More than likely it's probably a tooth off. 03 and 05 or close to. I think I might get the 60cc BBK and then a head for it that might make worth my while to pull the whole thing back apart again.

This is the head i already have an intake and carb for it.
www.scrappydogscooters.com/139QMB_50cc_Performance.html


Basically all I'm really aiming for is a hotter small bore engine.
Also sure the cam is on the crank cause we cranked it over by hank with my pulling on the chain mentioning it with my finger where the cam gear would go so to get it to tdc with out disturbing the cam potion. if that makes any scene to you. I also took the liberty to install a magnetic drain plug with some fresh oil when i buttoned it up the other night. Not super useful but, nice thing to have just in case.

well it got it all back together and going turns out one of the pins on the CDI plug had back out so i got my spark back. also put the stock carb back on but, left the A9 cam and CDI in it runs 10 mph slower doesn't want to start or idle and runs hell fast on a big down hill and like crap on the on hills and flats. I thought i might start by checking for an intake leak thought i might spray some sealer on the intake gasket and see if that makes difference.

yup that's how i have it it's getting spark but, not running i'll try the stock again some other day i'm kinda wore out and feel cheated and let down. having learned non of it really adds any power. i left ebay seller a message apparently he had with a 100cc bore kit but, was too retarded to mention so also he isn't the only one some people not on ebay are selling the 24s as oem replacements. also sometime during the tear down last night the little clip in the spark plug holder fell out so it doesn't "click" when you slide it on witch isn't helping things.

I feel kinda bummed out today nothing really worked or went the way it should have.

EDIT i also put a cam in we checked TDC of the crank and cam so i really hope thats not the problem boy would that be a PITA