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Motorcycle Repair/1985 Yamaha Maxim 700N


I bought this bike new in 1985.  I parked it for several years, and now am trying to get it going.  I rebuilt the tank ball cock valve (it was leaking), and pulled off and cleaned the carbs, both top and bottom.  I did not take the floats off and remove the needle valve (new parts on order).  I seem to have a fuel leak coming from the fuel rail vent tube, between carbs #3-4.  It drips after running for a while and shutting the bike off.

How can I stop the leak from continuing, and is it something I can do myself?  Any help you can offer would be great.


I beleive the carbs are connected with fuel tubes with O-rings on them.
You can purchase a assortment of fuel line O-rings on Ebay,
I'm not positive but I think this is what your problem could be.
Secondly a needle valve is most likely lacqured up and stuck open and the carb is flooding.
After you replace them your problem could be solved.
If you cant get the carbs in shape send them to me I rebuild carburetors for a living..

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william joseph stack


I specialize in Virago carburetors. Internal parts sizes, Needle and jet sizes for each and every year and model. Hitachi and Mikuni. I also can give tech support and Tech Support for carburetor problems and issues. Carburetor tuning and syncronization. Carbburetor rejetting and dynojet installations for engine modifications. I know every needle and jet size for every Virago made. I have done over50 Virago carb Salesand Rebuilds in 2012. I have over 50 sets ofVirago carbs in stockright now. I Build, Ride and Breath Virago. I have both the 1983 Midnight Virago's. The XV750MK and the XV920MK. 1 of my 1981 XV750H is is Premier Cycles, Billy Joel's Bike Museum.... I am an Honest and Fair man. I am also a Finicky Perfectionist withmy carb work. Ihave all the obsolete hardto find carb parts. I have new diaphragms, new floats, I have the float level setting down to an art. I have fabricated transparent bowls for both version 1 and version 2 carburetors.


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