Re: shut off at high speeds
 

It's supposed to be on the back side of the petcock.I have a sneaky suspicion that somebody changed to a older style petcock and thats why the vacuum line is blocked off.
:cool: :)

Re: shut off at high speeds
 

thanks guys this is my petcock

http://sphotos.ak.fbcdn.net/hphotos-..._1260873_n.jpg

http://sphotos.ak.fbcdn.net/hphotos-..._2438211_n.jpg

Re: shut off at high speeds
 

If it was working right it would not make any difference. Same as running on Pri.

This the way all older bikes worked. Always turn off when stopped. to keep the floats from having to hold back the gas.

Re: shut off at high speeds
 

Well, there's your problem...

For detailed parts diagrams, and to see how stuff is supposed to go together, check out ronayers.com

http://www.ronayers.com/Fiche/TypeID/26 ... odel/GZ250

Re: shut off at high speeds
 

ouch 76 bucks and i think bike bandit was 79 ill hunt on ebay . do you guys know if there are different petcock that are interchangeable with ours

thanks JWR , Jonathan and Blane , you guys are quick

Re: shut off at high speeds
 

I don't know, but I would get the right one and remove that source of guessing.

Re: shut off at high speeds
 

I agree with JWR, find a used one in good condition if the new price scares you away. But to avoid simply recreating the same problem, use a GZ250 petcock.

Petcock's rarely go bad. Someone must have broken it or damaged a tube while taking it off and thought they needed to replace it with a universal one.

You're almost there. Keep it up.

Re: shut off at high speeds
 

hey guys i bought a petcock on ebay should be here in a week or so . I did the shim mod last night and drilled that plug i brought the screw to 2 turns counter clock wise from lock and the bike is running stronger with less flat spots . but i think reached the point where more turns to counter clock didnt seem to help and im still getting a back fire and running hot and dying .

I am going to pick up some jets . my set up is cheap loud pipe the PO put on no air box mods and now the shim and mixer screw mod. what sizes would you guys recommend i try im not looking max power just soming to stop me from running lean

Re: shut off at high speeds
 

I used a 132 main jet with after market exaust,and a Hiflo-Filtro air filter.When adjusting the idle mixture,you need to adjust to where the bike idles best,turning screw out is richer,in is lean.
:cool: :2tup:

Re: shut off at high speeds
 

thanks blane should i get a couple jets around that?