Okay so here the story on my bike. I bought it about a year ago with 4500 miles. it was my first bike. When I first got it the carburetor was dumping gas out the top so I sent it the mechanic and had the carb rebuilt, oil changed and the battery replaced. I everyday rode it for about 4 months, downed it a couple times. Clutch cable snapped on me while riding in second gear, put a brand new one in. Then the rod for the clutch lever snapped on a long distance trip so I brought it to a shop and got it welded. My next break down was when my petcock failed, realized it was the petcock and just turned it to prime. Rode it without issues for awhile after that and then I was making about a 150 mile trip and my bike all of a sudden died on the highway, wouldnt start back up. Got it towed to my girlfriend's house and changed the spark plug cause that's all I could think it could be having already had the carb rebuilt and that did nothing. Now the kicker is that I never had the oil changed between that point and when I got it and it's now at about 10000 miles so 5500 miles with no oil change. So really my question is, is the engine likely blown from lack of oil (none visible in the oil sight hole but there never was when I got it back from mechanic and I didnt know enough to question it) or could it be from the petcock having been on prime or some other issue?? I assumed the engine was just blown so it had been sitting at my girlfriend's house for about 8 months but I just got it back and the more I think about it the more I'm curious if I could get it to run again, the engine will still crank/turn over. Thank you very much for any help!!!

It just died, didnt really notice anything before then just suddenly died didnt bog down first or anything just cut off and died. I ended up purchasing another savage and cracked the oil filter cover so had to take the one off this bike so no oil in it now or very little havent tried to start in awhile. I did change the spark plug so I assume it had spark but I dont know how to check if it for sure does.

I know this is a silly question but you do have gas. After 150  miles on prime you could simply have run out of fuel.

Check the oil level. In fact change the oil and put 2-qts of fresh oil in it. After all that put a genuine Yamaha Raptor petcock on it you will not regret it.

joshbur237 wrote on 04/21/20 at 14:17:49:


only if it were bone dry and seized up.

you'll have to ask someone else how far you can ride it after forgetting to put oil in it after changing it.  

norm92de wrote on 04/21/20 at 14:20:38:


A bad petcock will shut off even in prime.
the diaphragm gets hard and that flimsy little bypass lever can't open it.

The petcock was still leaking oil out in prime so I believe it still had fuel. It wasnt noisy when it died on the highway however.

IslandRoad wrote on 04/21/20 at 17:01:55:
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Great advise except I wouldn't waste my money on an oil change until it starts up after you replace that faulty petcock!    (But make sure you add enough oil to get it at least halfway up the glass when the bike is straight up. And take note of how much oil that is.  The bike holds a little less than two quarts.  Hopeful you need less than a quart, quart and a half. )

Hopefully that's all it is.

If you ran it out of oil you would have either seized it up, fried the rings, or destroyed the lower bearings.

If it sized up, you would have known.  It the motor would have ground to a halt and locked up the rear wheel.  You would need to pull in the clutch the compensate.  

If you fired the rings it would have probably kept running and then refused to restart after it cooled off.  Unless the piston crown failed and munched up.  You would have heard that.  Same with broken valves.

Lower bearings just make a lot of noise, like a big hammer in the bottom of the engine, but the engine can run for a long time with bad main bearings (and cause a lot of damage to the crankshaft, rod and wrist pin in the process). 

If the engine seized up would it still turn over when trying to start afterwards?