Join Date: Apr 2004
Location: Round Rock, TX, USA
Re: New 14 year old Virago.
does it start? If it does, I would "flush" the cylinders with Marvel Mystery oil (MMO)and crank it over.. with the plugs OUT.
Crank it over enough to "flush" the excess oil out.
Reinstall plugs, mix 1 ounce of MMO to one gallon of gas.
Flush fuel tank (drain)
Add MMO and oil mixture... start bike... rev it up!!!! this should "blow" carbon out and free up rings if they are "sticking".
Run compression test... usually anything over 120 is good pressure for a combustion engine... the most important is that all cylinders are within specs and 5% pressure difference.
The MMO and gasoline should dissolve much of the tank sediment... now you can remove the tank and drain the fuel.. also clean up the tank fuel strainer and petcock. If you find any rust you may want to Creme it.
If you can find the space, add an inline external auto gasoline filter.. a plastic one is ok... to try to keep Gas tank trash out of the carbs.. may save you a rebuild of carbs.
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