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I have a 1980 Suzuki gs250t and my oil smells like gas if I ride it will it ruin it or what do I need to do to fix it?

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It will ruin it, because as gas gets added to the oil it will thin out substantially fast, causing major engine ware. the only good thing is if you had any sludge build up or tarnish from the age and old oils chances are its pretty darn clean now. the problem is probably bad rings and oil seals on the pistons or really bad valve seals letting gas and air leak back into the heads and in your oil. depending on how many miles are on the bike I would suggest a top end rebuild and if you don't have the know how to measure and check the heads when there off send them out to get inspected. I just did a top end on a Harley for somebody and the parts cost after needing new valve seats new exhaust valves new valve guides and seals new pistons rings gaskets and amsoil per the customers request was 1158.00 before labor. which was the better part of a full day 8-10 hours .

Posted on Jul 12, 2013


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Posted on Jan 02, 2017

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SOURCE: Correct oil fuel ratio,1980 Pe 400

32 to 1 gas and oil > Two Stroke Engine Oil ( not Motor oil ). This equals 4ounces oil per gallon of gas.

Use premium unleaded gas. No Ethanol gas.

10w40 motor oil for the gearbox. Stick with the major brands; Pennzoil, Quaker State, Mobil or Shell.

Please take a moment to rate this solution. Thanks Beetle100! :)

Posted on May 03, 2009

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SOURCE: i have a 1981 suzuki gs250t one day it started the

1st check the fuse(s) are OK.
Sounds like a dead battery, either old or not being recharged by system.
The voltage across it should be at least 12.2 volts switched off rising to 12.5 -15 volts with engine running
If battery OK then check connections & wiring from battery to ignition switch & back out into the loom

Hope this helps (if so please mark as very helpful)

Ride Safe

Posted on Apr 15, 2010

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Hi, please let me know if you find out how to remove the seat, trying to do the same here! Thank you

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SOURCE: 2007 Suzuki Boulevard C90T. Engine

Sounds like the ecm might be locked up or a breaker has gone bad. Try unhooking the battery for 10 min or more and hook it back up and lets see if the ecm resets. Let me know how this goes and we can go from there.

Posted on Sep 21, 2011

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I have a 1981 suzuki gs250t and gas flows out of carburators when engine is running.

The seals on the float needles are either dirty or gone you will need to strip the carbs to repair. Regards Jim...

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Hi, Kyle you have a lot going on here that needs professional attention plus it's an old bike you probably have contaminated carburetors that need a "Chemical Dip" as for excessive oil in the air box that could be from too much oil in the system for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. If necessary, transport your bike to the dealer or shop and have a professional technician take it for a test drive, if it is in running condition, and give you a written estimate of repairs and answer any specific questions you may have about your problem. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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I have a 1980 Suzuki gs250t the oil smells like gas but not bad and when I start it and then shut it off and check the oil it always has a little bit more.

sounds like you have got worn piston rings/barrells the excess gap is alowing the fuel mixture in yhe bores to leak past down into the the oil- engine may need major overhaul as this will only get worse

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My rmz250 oil smells like gas

Is quite normal for some petrol to pass the piston rings into the oil sump - this is actually the number one reason you need to change oil regularly on motocross bikes. People think it is just the age of oil or the colour of oil which tell them time to change oil? But in fact, it is the percentage of petrol in the oil increases every time you ride it, and as you would imagine the more petrol in the oil the less lubrication you have which leads to higher operating temps which in short is disaster waiting to happen !
If you know your oil is very new and it still stinks of fuel after very little use then my guess would be it is time to replace piston and rings - but if you know oil is old (over 4-5 hours of riding useage) then the smell is telling you should have changed oil about a hour of riding ago?
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I had a hard time starting the 1980 xs 400, one piston is not firing, just dumping out gas smoke into the muffler. Muffler is cold on that one side.

It sounds like you have a carburetor float that is stuck in the down position flooding the cylinder with gas. Start by removing the carburetors and giving them a thorough cleaning . Closely inspect the sides and tips of the float needles.If they show wear or damage replace them. If you have black plastic floats , test that they float in a cup of gas and do not sink . If the float sinks replace it. Ethanol fuel will saturate black plastic floats over time causing them to sink. Change your plug , it is probably wet fouled from the gas and check the new plug for spark. Also check that your crankcase has not filled with gas during the flooding. That is why you should always turn your gas off when not riding so if a float sticks you do not ruin your oil. If gas has fouled your oil, change your oil.

Sep 12, 2010 | 1980 Yamaha XS 400 Special

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I have a 1980 suzuki gs1000 g. clutch?

Drain the oil and install a new oil filter. Dirty, gritty oil can make a clutch act this way. After the oil change , ride the bike for an hour or so. Now drain the oil a second time. Doing this will flush most all of the grit from the engine.

FYI > Go to this site and you can download a free PDF service manual. Most all of the manuals are in English.3bed404.gif

FYI > Go to the site below where you can see a parts diagram for your specific bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part, the part is not in stock.

A “very helpful” rating for this answer? Thanks!

Jun 30, 2009 | 1980 Suzuki GS 750 L

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Proper start-up service for a 1980 Suzuki GS550L motorcycle.

Shoot WD40 into each cylinder to get them wet.
Change gearbox oil and oil filter. Use 10w40 motor oil in the gear box. Don't use any synthetic oils, oil marked "EC", or oil with "special" additives. Stick with the major brands; Pennzoil, Quaker State, Mobil or Shell. How bad is the rust inside the gas tank? I would consider a liquid tank liner if rusted. Google “ kreem fuel tank liner “ or go to www.
  • Lube chain or get a new chain (if needed)
  • Lube Throttle, clutch and front brake cables
  • Lube Speedometer cable
  • Grease the swingarm, axle and steering stem bearings.
  • Install a new battery
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2 Answers

Correct oil fuel ratio,1980 Pe 400

32 to 1 gas and oil > Two Stroke Engine Oil ( not Motor oil ). This equals 4ounces oil per gallon of gas.

Use premium unleaded gas. No Ethanol gas.

10w40 motor oil for the gearbox. Stick with the major brands; Pennzoil, Quaker State, Mobil or Shell.

Please take a moment to rate this solution. Thanks Beetle100! :)

May 03, 2009 | 1984 Honda XL 125 R

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