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Motorcycle Repair/1985 Virago 1000cc

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Question
My bike will start on one cylinder then fire on both and start backfiring exhaust valve has been changed and compression seems low in same cylinder according to previous owner but I have not found that yet but oil will slowly leak out exhaust opened timing chain covers and on top dead center on 1 #2 seems to be about 1 inch off bottom would this be a timing issue or is there another possibility thank you for your time

Answer
I have had that same bike plus several other Virago's.
I rebuild Virago carburetors for a living...www.viragocarb.com
Now to your issue. The timing should be checked, and the 2 cam chains should be checked.
The chain tensioners can cause an issue if they get worn and loose.
The Virago's have to have the oil changed often so they don't wear out the plastic pads
on the tensioners. It sounds like a cam chain is slightly off and both valves are not closed completely on compression stroke. Could be a slightly bent valve.
I would get a gasket kit and open her up  and assure all timing and cam positions are exactly correct. I would also inspect the piston rings as it also sounds like there may be an oil ring broken. I would check the timing and cam positions first and see if she will run.
Youtube is a great resource for seeing how to check timing and cam positioning.

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william joseph stack

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

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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...

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

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