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Motorcycle Repair/1984 yamaha virago 1000 cc (981)


QUESTION: I am having trouble with the rear cyl.carb on my newly acquired
1984 virago 1000 cc with hitachi carbs. when trying to accelerate
the bike holds back and won't wind up to its full potential .When I pulled the plugs the front cyl . looks a slightly orangeish tan color. the rear plug is wet and black .and after I replace it . It does the same thing in a short time. And then becomes almost impossible to start. unless I change the fouled plug again.  Im familiar with bikes and I have the CD manual for this bike. But trouble shooting problems such as this is not its strongest point. Can you kindly help me  fix this problem? Thank You for taking the time to help me get this bike where I can enjoy it ..       Bob

First off the Front cylinder sounds like its OK.
The rear cylinder is running to rich. And to rich of a mixture can foul a plug quickly.
There are several things it could be. Jet needles installed backwards. Main Jets installed
backwards. Pilot Jet Screw for that rear Carb is out of adjustment.
You contacted the right guy. (drvirago777) I am a Virago Carburetor Specialist and Rebuild Virago carburetors for a Living. My website:
Try turning in the Pilot Jet screw for the Rear, clockwise in 1 full turn and try it again.
I can Rebuild the set back to like new condition if you would like.
I also can offer Tech support with installation and tuning...Joe

---------- FOLLOW-UP ----------

QUESTION: Hi Joe: Is the $225 or $195 for the both carbs or is this your price to rebuild each carb.   Thank you ...........Bob

The $195.00 is a Very basic rebuild using the carbs screws and jets, just new gaskets.
The Other $225.00 is what I call a Max Rebuild. All screws replaced with SS allen head cap screws,
New bowl drain screws, and also you get new spark plugs and new manifold-rings and new U-cup shaft seals installed.
either one is a Professional Rebuild. Its just the Max is a more in depth Rebuild, with more new parts..

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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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