Question about Triumph Trident 750 Motorcycles

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1969 triumph trident bobber has to much oil pressure building up and is blowing off the oil cap and overflowing out of the tank is it exsesive crankcase pressure or to much oil in the tank any ideas

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Yes! sounds like exsesive crankcase pressure. time for a top end rebuild.

Posted on Apr 24, 2009

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My 1969 triumph spitfire has been running fine but lately has started suddenly cutting out and losing power under heavy uphill loads. When this happens it always blows oil and smoke out aroumd the bol


time to rebuild motor or replace it. The smoke your seeing is pressure from the cylinder escaping around the piston rings into the crankcase and venting out the covers

Aug 24, 2014 | Cars & Trucks

1 Answer

Why does oil pressure build up in oil reservior


Check for a pinched/blocked vent line.
Possible bad piston rings and over pressurizing the crank case (compression blow-by).
Overfilling the oil tank. Check with engine hot.
Also, it could be just a aged/dried up/ cracked o-ring.

May 07, 2014 | Harley Davidson XLH Sportster 883...

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Does a blown head gasket cause pressure build up in a surge tank


could be a air pockets in the coolant system that have top bled out
it is a simple exercise to have a compression test done to check for head gasket or cracked head

Mar 14, 2017 | 1999 Cadillac DeVille

1 Answer

2001 Triumph Legend TT engine oil flooding with petrol


Hi, Malcolm you're getting ready to go riding you pull out the dipstick to check your oil level and are greeted with the unmistakable smell of gasoline. What happens next depends on the following:
1. You have experienced this before and do not start the engine but do change your oil and filter leaving it 1 quart low until the engine reaches operating temperature then top off as necessary.
2. The amount of time your bike has been sitting since the last time the engine was running.
3. The amount of gas and contaminants in the tank.
4. The oil pump location, exterior or interior.
5. The condition of your petcock gasket/seal/diaphragm.
If your gas tank was low and you start the engine probably nothing you would notice but if your gas tank was full and you start your engine the oil/gas mixture can blow into your air filter, come streaming out of your crankcase breather hose, and launch your oil tank cap followed by a blast of oil. The mess can be minor or you need to call a Hazmat team for assistance. This will also happen if you overfill your oil tank.
Next is the how and why gas can get into your oil tank/system:
a. The vacuum petcock rubber/diaphragm fails, which allows gas to flow from the fuel tank through the petcock, through the vacuum line into the intake manifold, then into the combustion chamber, where it seeps past the piston rings and into the bottom end.
3. Nonvacuum petcocks that are not turned to the off position will patiently wait until contaminants from the gas tank build up in between the carburetor needle and seat breaking the seal thus inviting gas to enter the combustion chamber eventually finding it's way into the bottom end and the oil tank.
4. Bottom line if you're not going to ride your bike for a while turn off the petcock.
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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1 Answer

1996 Triumph Trident 900. acts like its out of gas,


Hi, Alan always check fuel flow first to isolate the problem area otherwise the usual suspects are:
1. Fuel tank empty.
2. Fuel cap or fuel tank not venting properly.
3. Fuel filter clogged with rust or dirt.
4. Fuel valve/petcock not in the on or reserve position.
5. Vacuum line to fuel valve cracked, broken, pinched, or missing
6. Fuel valve/petcock clogged or diaphragm cracked, cut or torn
7. Fuel line from the fuel valve to the carburetor or fuel pump clogged, cracked, pinched, bent, broken, or missing.
8. Fuel pump not working
9. Fuel line touching cylinder or head causing fuel to boil and vapor lock, repair by rerouting and wrapping line with convoluted tubing.
10. Carburetor inlet clogged.
11. Carburetor float or needle and seat stuck.
12. Carburetor not venting properly overflow line or bowl fitting clogged, pinched, or bent.
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.
http://www.triumphriders.nl/FoldersPDF/Daytona_900-1200_(1993-1997)_Service_Manual_(eng).pdf
http://www.worldoftriumph.com/triumph-motorcycle-parts.html
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1 Answer

Front fork oil capacity 1993 triumph trident 900


hi, with forks removed from bike with spring inserted and fork stancion down all the way fill with oil up to 110mm below the rim, thus 110mm air gap, hope this helps and thanks for using fixya
paul

Jan 30, 2011 | 1993 Triumph Trident 900

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I would like to see photos of front conical brake and how it mounts on fork


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3 Answers

Replacing gas cap caused pressure build up in tank


The tank has to be vented, you have a drain line on the overflow that allows air to come in, but it still has to go out, there is usually a tiny hole in the cap somewhere, He may have clogged some of the lines to the tank with the sealant, what did he use?? Most tanks have a map pasted on them where all the lines go, Find one and see what is missing or wrong, if you have to seal the tank, get it off, dry it out, wash it soap and water, get some POR brand tank sealer, works great, and pour it in there , follow their instructions, hope this helps.

Apr 24, 2010 | 1996 Honda VF 750 C Magna

1 Answer

Saw runs great for the first few mins and then looses power like I'am losing fuel let it sit and it will run great and then the same thing happens


Check the vent in your gas tank cap. It might be clogged. See if there is pressure in your tank when the saw looses power. Some saws are great for getting hot and heating up the fuel tank and building up pressure when the fuel cap vent becomes clogged. When people fill their tanks and overflow fuel leaks down over the engine, the oil in the fuel mixture tends to coat the engine and then saw dust sticks to it. Over time it clogs up the fins on the cylinder head and makes it harder for them to stay cool. The increased heat can add to the problem I spoke about above. When you build up that pressure in the tank it tends to force extra fuel through the carburetor and makes the engine run rich.

Nov 29, 2009 | Garden

1 Answer

When stored oil goes from oil tank into engine, have to drain engine to refill tank and run engine. this is 1969 trident. thanks


This is quite normal. You have what is called a dry sump. The oil gravity feeds through the oil pump. you don't need to drain the engine , just start it and let it idle for a minute then check oil level in tank. The scavange side of the oil pump pumps 3-4 times more than the pressure side.

Aug 14, 2009 | Triumph Trident 750 Motorcycles

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