Did an oppsie on highway, need help diagnosing

[GfromLT]

Hello. Any mechanics out here? Gotta a problem (but it might not be a problem).
Im new rider, wanned to "feel" the bike , went outta on highway doing some 70mph and i shifted into 3rd from 4th, bike made not so nice noises, stalled and i rolled to a stop. Tried turning it on again with no luck, it would start, run for few seconds and die. Pushed it home. After few hours i tried starting it again, it did, start wasnt rough, sounded normal, however now I have to give it more choke than before to run, at idle it sounds like little tractor. Drove around slowly, gears seem to be in their places, and it still cluncks into first, so I guess there wasnt catastrophical gear failure? How ever low idle rpm seems abit odd.
I did have some problems with fuel before "accident", because it would run rough/stall without a choke.
Bikes is 98' yamaha xj600s diversion (seca II in USA)

Should I be worried? (About the bike, not my riding skills)

[Nobby the Bastard]

3rd at 70 shouldn't hurt it at all. Did you just shit yourself and let it roll to the side of the road with the clutch out until it finally stalled and am now looking for an excuse for it?
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
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[GfromLT]

[xX-Alex-Xx]

You remembered to put petrol in? Manual fuel tap?
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DILLIGAF

[GfromLT]

[B1N]

Hi
from the symptoms you might have skipped a tooth on the cam chain, it would be well worth checking the alignment.

[xX-Alex-Xx]

Either that or you're only running on 3 and a half cylinders cos you're not fully sparking on one.
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DILLIGAF

[MCN]

Snapped drive belt/chain.
Swanked clutch drive.
If you can push the hoowur fwd and bwd in gear engine off then theres an expensive mechanical mesh inside the engine/gearbox/clutch housing or the fibal drive. (Chain, front sprocket cush drive)

p.s.
Highway?

R U Murican?
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.

[GfromLT]

[Nobby the Bastard]

In Germany, autobahn. In the uk, motorway.
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050

[MCN]

[mentalboy]

Bloody hell, there's a lot of doom mongers on this thread.
Why don't we start with the simple stuff like the tank breather? It has all the hallmarks of a fuelling/air issue.

Edit: Which state are you in, VT?
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Make mine a Corona.

[WD Forte]

LT is Lithuania
Missing gear and over revving is not usually fatal
unless the engine is in very poor state

Sounds like it needs some servicing anyway
so just get a manual and do that.
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bikers smell of wee

[MCN]

[GfromLT]

[Nobby the Bastard]

To test compression you need.... wait for it...... a compression tester....
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050

[stinkwheel]

One thing to check is if any of the plugs are loose. Also check the condition of the plug electrodes.

Is it running on all 4 cylinders? A spot of oil on each header pipe will tell you if they are all getting hot.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[A100man]

[WD Forte]

The 'tractor' like sound may be just a blown exhaust seal for all we know

Best take a phone vid and post it to IMGUR/Youtube or similar
and put the link to it here
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bikers smell of wee

[Bhud]

WD Forte's idea is good. Make a video, upload it to Youtube, and set it to private if you like. Let's hear it idle. In your video, pull in the clutch and show us if this makes a difference to the tractor-like sound. Spray some water on your exhaust headers after starting from cold, to check they're all getting hot.

[Nobby the Bastard]

Spray the water on when cold and then start it...
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050

[GfromLT]

Thank you WD forte, Bhud and others for advice.
Right now im away for holiday (different town). I do have thermal camera at work, Ill borrow it to see the exhaust header temperatures and upload a video of idling when im back.

[Robby]

New rider, 25 year old bike. I'm assuming you haven't been riding it hard, and it sounds like the bike will have the sort of usual issues found on a 25 year old bike sold to a new rider.

This is likely the first time in a while that the bike seen 70 in 3rd, in a somewhat violent manner. So it had a sudden spike in pressure through the inlet, engine, and exhaust.

First place I would look is at the exhaust, to see if it has a hole in it somewhere in a rusty bit. Bike are very sensitive to their exhausts, even a small hole will make it sound strange and affect the performance.

If the exhaust is fine I would be looking at the inlet rubbers - between the carbs and engine - so see if there are any holes or splits there.

Checking the sparkplugs as stinkwheel said is a good bet.

Welcome to motorcycle ownership. You'll learn to fix things fairly quickly, they break a lot and need a lot of routine maintenance. Unlike a car where you can service it once a year, you will need to check engine oil, tyre pressures, chain tension and brake pad thickness quite frequently.

If you have any biker friends who are also good with spanners, ask them to check the bike over and see what they find. Every old bike will have issues that you won't notice, but make a big difference.

[GfromLT]

[Nobby the Bastard]

There's nothing wrong with the motor, its either fueling or electrical.
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050