SOURCE: starting problem on rs125
Based on your description, its sounds as though you have a starter or starter selnoid problem. The starter selnoid is not engaging the engine at first and then when it does, is nort passing enough current through to the starter motor to get the job done.
Bill
SOURCE: 2006 Aprilia RS125 doesnt start
Hi .... Try switching the petrol off just prior to stopping the engine and start up again with the petrol OFF. There's enough petrol in the carb to start the bike. A good battery should show over 12 volts. Take the plugs out and give them a good clean or replace them. Is there a petrul pump fitted ? A two stroke needs to be ridden quite hard to maintain efficeincy, higher revs etc ........ let us know how you get on ?
SOURCE: i cant get my 2005
You need 3 things for it to start: Compression, fuel and spark.
1. First and easiest thing to check for is spark. Pull one plug and connect the lead to the top. Rest the plug against the head to ground it. In your garage (or somewhere where it is somewhat dark) turn on the ignition and crank it for a few seconds while looking at the plug. You should see a bright blue spark.
2. If that checks out, and you can get a hold of a compression tester check that. We can probably assume you have sufficient compression in at least a couple of cylinders.
3. Next is gas. If it has been sitting for some time, (A) the carb passages could be gummed up. Or (B) the petcock screen could be plugged, not allowing fuel to reach the carbs. This happens to my bike about once a year. Or the floats could be out of adjustment, unlikely. With the petcock in the on position, open one of the drain screws on one of the carbs to be sure fuel is reaching them.
One last possibility is that your rectifier has gone bad. when was the last time you rode the bike?
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