Carburatore problem Modenas 125 Motorcycles

Single Cylinder so just two valves.

unfortunately it is unknown in the western world (USA), and nothing online. contact them direct

https://modenas.my/v2/scooter/karisma-125/

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You will need the model year to start with and then you will be best advised to contact a modenas dealership.

http://www.fixya.com/motorcycles/t19839477-adjust_timing_chain_gt128

1. Charge the battery up completely using a battery charger
2. start the engine and place a voltmeter across the red and black terminals and it should read between13.5-15.5 volts when rpm is about 2000 rpm. If the voltage reads lower or higher than listed above, the charging system still has a problem.

check the rear tyre pressure if its correct look at the tire tread, if its ok then move to the brake, wind the nut in on a drum if its drum brake to make it more sensitive and on hydraulic brake if the lever goes and theres not braking power, you have air inside the system, bleed it out and try again. if you dont know how, take it to a mechanic.

there's a short between red cable and black cable (body). or the cable is too small for larger power consumption, check the wiring inch by inch

eigther the voltage regulater went bad or there is a short draing the battery but it seems like the voltage regulater some bikes like my iron head sportster charges off the starter not sure on yours but have a shop check the regulater

Well ya might won't to look at the starter wire's and see if you have a short sum ware if you can not find a damaged wire then the prob might be in your stater/alternator. Of witch I would need to know more bought your bike.