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Hi i have a honda cbr125 r 57 plate. when riding i experience loss of power/ spluttering. im going to take the bike apart 2mrro, what should i look for and check

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The same problem im having.carbs dirty and needs to betaken apart and cleaned with carb cleaner.clean jets

Posted on Oct 19, 2013


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Posted on Jan 02, 2017


SOURCE: bike coughs,splutters and even backfires more so in low rev's

Either take the carbs off and clean them or add some fuel additive to clean the system. Sounds like you have a clogged jet.

Posted on Aug 14, 2009

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SOURCE: hi, I have a gpz500 A series on a 94 plate. I

hy I have gpz500s 94" and the rotor just brake to part,and I put a zzr 600 rotor in and now I have a problem because the zzr rotor didn t have a sensor on the rotor ve weld the old sensor of the gpz rotor exactly there were was the gpz rotor,but now at 5000rpm just stops for a second and its runing...I dont know whats the problem..

Posted on Jun 07, 2010

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SOURCE: Hi I have a problem with my Hyosung GT250R. What

Hi, if the the bike is idling at a normal rpm but keeps on stalling you probably will need to service your carbs or at least clean the pilot jet as this is probably blocked/dirty.Bike carbs are simple and once the float bowl is removed you can get the pilot jet(smallest jet) out with a small bladed screw driver and clear it.

Posted on Sep 13, 2010

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1 Answer

Hi my name is robbie my mito won't go over 6000 rpm when riding it just splutters

Hi, Robbie and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
6. Float needle is not seating.
7. Faulty reed valve.
For more information about your question please visit the website below. Good luck and have a nice day.
bike wont rev up past 6 000 rpm please help
need help My bike will not rev up and hit the power band
Cagiva MITO EURO2 125 2004 parts OEM Motorparts

Aug 22, 2014 | Cagiva Mito 125 Motorcycles

1 Answer

Kdx 125 sputters just before the "powerband" kicks in

I used to ride enduro in the 1980s on a KLX 250 :>)

Sounds like you have two issues.

Your spluttering and jolting sounds like a defective Reed Valve, but could also be carburetor float level problems. If it is runs fine when on the power band, then the carb is fine. For the cost, I would replace the reed valve.

Regarding the electrics, this could be a few things. Check all the earthing points, especially the one on the negative side of the battery. Take the wire off where it grounds to the frame, clean and apply Vaseline which stops corrosion and is electrically conductive. Check all the connectors that you can find. Pull them and make sure they are clean and sealed. Vaseline is good on these too. The specs below confirms it is rectified and regulated. Check the output voltage of the alternator with a test meter. Check the battery is as spec Battery 12v 3Ah and get it stress tested, or just replace it, if it older than 3 or 4 years.

You really need a good workshop manual. I had them for all my scooters and bikes.


Spare Parts List


Voltage Main Fuse 20A
Ignition CDI electronic advance
Charging System 3 phase AC, 27V@4000rpm. Rectified 14.5@4000rpm
Spark Plugs NGK BR8ES
Bulb-Headlight Battery 12v 3Ah
Ignition Timing 10.5BTDC@1300rpm - 26.5BTDC@3000rpm

Engine Type Liquid Cooled 2 Stroke Reed Valve Straight Single Bore x Stroke 56 x 50.6 mm Compression Ratio
Displacement 124mL
Lubrication System Oil injection
Starting kickstart
Carburation Keihin/PE28
Carburation Main Jet 115
Carburation Idle Jet 48
Pilot Screw Setting 1.5
Red line RPM 10,500rpm

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1 Answer

My cbr 900 rrx is spluttering below 4000 revs?

Seaform will fix this trust me...go to autozone oickup a can put in 1/3 of can into approx two gallons off gas and ride at least fifteen miles hard and it will run alittle rough at first but it should kick in while you ride.

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Front suspension forks


with my experience with honda big bikes it is usually 7 to 7.3 ounces per fork.

hope this helps

ride hard live free

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4 Answers

I have a pit bike and it splutters alot when i ride it

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