Done with vacuum petcocks!

[theo547]

I have owned my scooter for about a year now and its been quite an adventure learning and breaking things

Late last summer i started having petcock issues when using my 70cc kit - under a long load (10+ miles at near wot) it would seal and cause a soft seize - so i took off the kit and went back to 50cc.

in the fall then with the 50cc engine i started having to suck on the vacuum line just to get the petcock open so i could start my scooter.

First thing i did this summer was replace the petcock and reinstall my 70cc kit (now with a new piston... after it melted the last one...) - it had been running working great for a few weeks then yesterday when i was leaving for a gig i made it down the block and it shut down as soon as i tried to WOT .... then it did it again today when on a cross town trip.. maybe 20 miles.


Anyways screw these petcocks im going free flow from now on. im sure this piston is all messed up again, but ill live with it for now.

Anyone else have this problem?!

[Deleted]

manifold vacuum is low at WOT so some of the stock petcocks will tend to want to close.

[theo547]

yep, not my problem anymore - pretty pissed off that it came to this, but i cant afford to be replacing top ends every other month.

[tango]

This scoot is a 4T or a 2T, theo? How fast does she go with the 70cc kit?

[jmkjr72]

did you go and get a manual one at fleet

i dont think i have any manual ones left on the shelf
joel might have one

[theo547]

2t - to be perfectly honest i think im only around 45 mph. it needs some transmission work still, but right now it pretty much flies from 0-40

I have the following installed:
Autotech355 70cc kit
Leo Vince ZXR pipe
stock 19mm carb (atleast im pretty sure it is)
Hoca Variator
Koso Drive face
5g Hoca Rollers.

Im going to install my 2k clutch springs and 4g rollers tomorrow see how it responds to that. currently it has the yellow clutch springs and a 1.2k contra spring

[theo547]

i got the manual one from Menards $10.00 and came with about 2ft of fuel line.

[jmkjr72]

ok didnt know they had them at menards
was the on the east side or the new one in depere

the new one in depere has a lot of stuff they dont have on the east side

[theo547]

DePere - Dude that place is AWESOME... took a while to find it, but it takes me a while to find anything in that store. i dont think i ever leave there without buying something extra.

took about 15 mins to install the free flow line and it worked great... hopefully i wont be having these problems anymore

[jmkjr72]

yeah i made the mistake the other week i was in the depere one to pic stuff up for work (office is on packerland near the airport) saw some exctartor bits i wanted but didnt buy them
headed home forgot to go to the new store and the east side didnt have them

you shouldnt have the problem any more unlkess that wasnt the issue