I have a 1990 moto 4 250.

I want to put in stabilizer however I don't know how many (gallons) Liters the tank holds. I don't have a manual yet that gives that info.

Having said that, I could guess? but my next question is could I put in to much and cause damage? Also can I add fuel antifreeze to the mixture as well.

Any help would be appreciated.

 

I don't think you cant put in too much stabilizer unless you put in ridiculous amounts. I have put in double the amount on the directions and had no problems. It seems like most 250's are between 2 and 3 gallons of capacity so I'd probably just call it 2.5 gallons and put in that much stabilizer.

Or if you are picky, why not just empty out your gas tank into a gas jug and measure the capacity of your tank? Should just take a few minutes.

 

if your gonna store it for winter, i highly recomend draining the carb bowl as well

 

<div class="FTQUOTE"><begin quote>Originally posted by: cherokee99

if your gonna store it for winter, i highly recomend draining the carb bowl as well</end quote></div>

Since I store it indoors for the winter... I always drain the gas tank and drain the carb.

I have done that since new, and always have done that with my Snowmobiles... been working great so far! No need to clean gummed up carbs when taking them out of storage! No gas = No gumming up [img]i/expressions/face-icon-small-smile.gif[/img]

 

Doesn't draining the fuel cause the seals to dry up and crack? Just wondering...I always premix my stabil in a gas jug with fresh fuel and run the motor for a while to get the stabilized fuel through the system and into the carb. I wouldn't mix it with fuel that is not fresh as it has already degraded, even after a month. I only run super unleaded as the higher octane burns better and lasts longer. You can double the ratio of stabil to fuel and not hurt anything. It is just a fuel conditioner.

 

Doesn't draining the fuel cause the seals to dry up and crack?

it depends on how long your storeing something. over the summer, or winter, no it shouldnt. but if your talking YEARS of sitting its slightly better, IMO, to leave gas in it. then your less likely to have cracket seals. but the seals are designed to expand and contract with temperature.

short term, 6month storage, youll be better off draining the bowl

 

Good to know, thanks. I also remember being told (by a mechanic) to make sure if you store anything with fuel in it to make sure it is FULL. Otherwise, condensation can occur in the air space and cause fuel degradation. Does this sound accurate?

 

thats also wat is recommended for car storage. if you leave too much space in the tank or fuel lines moisture will collect and degrade the fuel, or make the mix too watery to combust