rs 125 problems

[ieatspudz]

I was riding to the shop when I heard a whistling sound coming from my bike, a few minutes later the engine cut out and now it won't turn over when I press the starter; It just makes a dialup modem sound and the engine does not turn. The bike won't move forward in gear, the back wheel just drags and it does not turn over. However when I push it backwards in gear it turn the engine over and the piston moves freely. So has anyone got an idea what the problem could be.

[P.addy]

Charge the battery, it should be spinning the starter motor. Worth pulling the spark plug out and doing a quick compression check.

[TomReilly]

You could try putting it in neutral when pushing it, may make a difference


or hold the clutch
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Motorcycle riding can be really cozy. If you want to be a little closer to your passenger, brake a little quicker for the next stop.

[ieatspudz]

Will no longer push backwards in gear, i also noticed a bubble in the oil feed to the carb, so I'm pretty sure its an engine sieze due to lack of oil, can anyone run me through removing the air bubble. I was going slow when it sized there was no bang or grinding noise so hopefully it has done little damage.

[P.addy]

Have you charged the battery, put it in neutral and pressed the start button with the spark plug out?

Might as well check there is compression and its not melted itself together.

[bikersupermot...]

hi there

take your spark plug out and put a tablespoon full of 2 stroke oil down the plug hole and leave it overnight.

next day put the bike into 3rd gear and gently rock the bike back and forward and maybe it will free the engine off.

will cost nothing to try it.
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tinybikes

[Major Doss]

Spark plug out, in gear, turn R wheel. Do we have piston movement? Yes? groovy. No? You allowed a very minor 5 minute flouncy hump. If no, does R wheel turn when in gear With clutch pulled in? If no, poss gearbox issue, if yes probably further up the fuel chain, so to speak. Let us know, one bit at a time!
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Antisocial phucker.

[ieatspudz]

It worked, I put 2 stroke in the spark plug hole and rocked it in second gear and it unsiezed the piston the starter turns the engine now pretty fast. I get 130psi on the compression tester but that is with a table spoon of oil in there. Would it be fine to start the bike up. what advice can you give me on what to do next. Can you premix the petrol with oil and if so what ratio.

[Kickstart]

Hi

If it had seized the top end I would be VERY surprised if it managed 130psi afterwards.

Possible it had seized the bottom end though.

All the best

Keith
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[P.addy]

[bikersupermot...]

[ieatspudz]

been running fine for the past few days, compression is down to 117psi takes a bit longer to start in the mornings but should be fine.
thanks for the help guys.

[ieatspudz]

been riding it since my last post and now its starting to have problems again. I stalled it yesterday at a red light and it wouldn't start again the starter was not turning the engine over there was just a buzzing noise. I put the bike into neutral and pushed it to a nearby car park. I rocked the bike in 2nd gear and the starter was turning the engine but only very weakly as if it had a flat battery, so i rocked it a bit more and the starter was working perfectly and the bike started.

I managed to drive it home but as i was going up a slight hill the bike started bogging down and stopped again even thoe I had the throttle open but it started first time after (might be a fuel mixture problem for that one). so the bikes fucked and i have no idea what is causing it any help would be much appreciated.

[P.addy]

[ieatspudz]

rebuild the top and bottom end?

[P.addy]