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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.

Experience in the area

9 years on Ebay with 100% feedback. My own website: that has some awesome testimonials ans feedbacks...

Organizations Forum


Ebay., Feedbacks from satisfied customers.


Over30 years expierence in Carburetor rebuilding and motorcycle and car repair andmechanics. I have certifications in HVAC, Welding. I have over 20 years in Building maintenance and repairs. Over 20 years in aSuperior position. I am a Licensed California general B Contractor. But I have settled on my Virago Carb Business...

Past/Present Clients

Clients and customers found in my Ebay Store History. DRVIRAGO777 VIRAGO CARBURETORS.

Average Ratings

Recent Reviews from Users

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    K = Knowledgeability    C = Clarity of Response    P = Politeness
Al04/24/16101010Thank you Mr. Stack. Very good advice .....
Prashant S Akerkar10/09/15101010Dear William Thanks. Thanks & Regards, Prashant .....
Prashant S Akerkar09/28/15101010Dear William Thanks. Thanks & Regards, Prashant .....
Agha09/24/15101010Thank You William, have moved the needle .....

Recent Answers from william joseph stack

2016-10-16 305 honda dream:

I just re-lapped my valves so to insure they seated perfectly.  I had new rings installed in my 1983 XV750MK.  The jugs were worn out. So I purchased jugs, and pistons from  a low mileage bike and had

2016-05-14 Battery compatibility:

If the battery Voltage and Cranking Amps is the same as  or even just a bit more it should work fine.  But then if the battery fits in the battery box is another problem.  I Installed a lithium Ion battery

2016-04-23 Virago carburetors:

Oil in the air box is not a good thing.  Before going further. I would drain the oil.  Refill with clean oil. Turn it over a few times.  Put a few drops of oil on top the pistons and the check the compression

2016-03-09 Intruder 800:

Yes a loose fitting muffler can cause issues.  I would install the new gasket before doing anything else.  The noise from modified exhaust isn't a backfire but more of a popping   or back rapping through

2016-03-09 Intruder 800:

Anytime your Modify the Exhaust Pipes it removes Restriction form the exhaust and moves much more Air through the Carburetors.  Then it is necessary to Increase the Fuel in the AFR. (Air to Fuel Ratio)


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