Question about 2005 Aprilia Mojito Custom 125

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Seems to be hold back and making slght crunching noise

My 125cc mojioto seems to be holding back when i take of its also make a grinding sound when im going slowly , I thought it had something to to the the petrol i have only been putting premium unleaded from caltex in ,when i change to bp it seemed to stop for a little and the power of the bike seemed to increase , it is now do the same thing as befor it is only 6 month old ,I was told maybe the carbarator needs to be cleaned ok can any one help me wiht this problem?

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If you are experiencing grinding noises and a power loss, I would look more to the power train and related components. Transmission, wheel bearing, brakes hanging.

With the engine off, I would push the bike slowly to determine if you are able to detect a grinding noise and if there is any resistence when pushing it.

Posted on Nov 19, 2008

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That does not sound good. I suggest you get it to a dealer before you do any additional damage.

Apr 02, 2014 | 2009 Harley Davidson FLSTC Heritage...

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A rubbing noise

Car Grinding Repair Guide:Worn Out Brake Pads or Shoes:Thebrake padson your car are designed to slow the vehicle when applied. If the brake pads are completely worn out they will make a grinding noise when the brakes are applied. The grinding noise is created when the pad is forced against the brake rotor in normal braking operation. To check for this condition inspect the brake pads in question. The brake pads should have composite material between the pad backing plate and the brake rotor, or on the rear of the vehicle brake drum and shoes. If a brake grinding noise is allowed to continue, brake operation failure could occur. The rotor featured below is a perfect example of what can happen if a brake grinding noise is left unattended.
Broken Brake RotorWhen agrinding brake rotoris neglected, it will cause the brake system to fail due to the separation of the rotor hat (center) from the outer web (braking surface). Additional problems the can occur include the brake pad to fall out completely or the brake caliper to blow out a piston. Either condition will cause brake operation failure. Do not drive the vehicle in this condition, brake operation failure will occur.
Checking Engine and Transmission Mounts: The engine mounts in your car are designed to hold the engine and transmission in place. When these mounts fail it will allow the engine to settle onto the car frame producing a grinding noise. To inspect for this condition the car will need to be lifted and the engine mounts inspected. Look for separation of the rubber and metal mounts that hold the mount together. If separation is detected the mount must be replaced.
Checking Axle Bearing Failure: An axle bearing is designed to support the weight of the vehicle while allowing the wheels to rotate. These bearings are manufactured with high grade steel that resists wear under extreme conditions. When an axle bearing fails it allows metal to contact metal under pressure with a linear motion creating a grinding noise. Once an axle bearing fails it cannot be repair, replacement is required. Remove axle bearing and replace with new and recheck. Some vehicles are equipped with a bearing hub assembly. The bearing below is the style of bearing is replaced by un-bolting the bearing hub assembly and replacing it with new. il-6 elisa kit Other bearing designs include separated bearings that include inner and outer bearings with bearing races, a four piece set. Separated bearings require an inboard seal attached to the bearing hub. This seal rides on the spindle to hold grease inside of the bearing hub, keeping lubrication inside of the bearings.

Grinding Noise When Going Into Gear (standard transmission only):When your car is stopped or coming to a stop the engine needs to be disconnected from the transmission or theengine will stall. With automatic transmission vehicles a torque converter is used to separate the two units, but with manual transmission vehicles a clutch assembly is used to do the job. When a clutch malfunctions it can not allow the engine to become disengaged from the transmission. When this condition occurs the input shaft of the transmission is not allowed to stop rotation, as a result this will not allow the transmission to be engaged into any gear. When a gear is selected a grinding sound will be produced. If this is the case in your car the clutch operation must be inspected and repair as needed.
Checking Power Steering:Apower steeringsystem is designed to utilize power from the engine to assist in the force needed to steer the vehicle. When the engine is running, aserpentine beltis used to transfer engine power to a hydraulic fluid pump. This pump pressurizes fluid and then transfers this fluid using power steering hoses that are connected to a power steering box or rack and pinion depending on how the car is designed. When the power steering system has run low on fluid it can create a grinding noise. This noise is more apparent when steering the car. When the power steering is malfunctioning the vehicle will be very difficult to steer. It is advisednotto move a vehicle with the power steering system not operating. Any steering component malfunction can cause the vehicle to be uncontrollable. When a malfunction occurscheck the system fluid leveland add as needed. When this condition occurs the power steering system has a leak and needs to be inspected and repaired.

Apr 25, 2013 | Motorcycles

1 Answer

Gearbox making a grinding or crunching noise

The best you can do is change the oil, look for metal, adjust the clutch, and hope it is supposed to make some noise as you shift. There is nothing else you can do short of totally dismantling and rebuilding the whole thing.But a little noise when shifting is normal.

Jul 09, 2011 | 2011 Vectrix VX1

1 Answer


Is the tranny oil full? what kind of noise? Is there any grinding or other noises, or is it a whining sound? Does the clutch adjustment seem any differnt than it was prior to the noise? I would start with the throwout bearing, first.

Apr 19, 2011 | 2008 Harley Davidson FLHRC Road King...

1 Answer

Hi, Im from Singapore. i bought this 2nd hand aprilia rs 125 '08 yesterday, everything seems normal when im on normal street, but when i hit the highway my bike just can go more than 60 km/h, the engine...

Sounds to me like you need a tune up. Check the fuel filter first, I suggest you change it. Are you using the gas that came with the bike? Change it also, if you are. Gaas that sits accumulates moisture and sediment. Could be clogging your jets at high speed

Apr 03, 2011 | 2008 Aprilia RS 125

1 Answer

Drive Chain noise

raise the wheel up in the air buddy and oil the chain and then spin the wheel what does it sounds like and is there movement get back to me with results

Oct 10, 2009 | 2005 kawasaki EN 500 Vulcan

1 Answer

2005 250gv making alot of crunching/grinding noise from rear wheel?any sugestions

bearings going raise the rear wheel and spin it see if you can hear a wooshing noise and wheel movement get back to me

Sep 22, 2009 | 2003 Hyosung GV 250 Aquila

1 Answer

Jumps out of gear when brake hard

The crunching noise is the slider gear going into the chosen gear. This is normal. The false neutral is likely just a case of shift pedal
adjustment. When braking hard you probably have your toe on top of the shift lever. If so then lower the front of the shift lever one or two notches. If your toe is below the shift lever then raise the lever one or two notches. THis adjustment should fix the problem.

Please rate this solution. Thanks!

Mar 22, 2009 | 1999 Honda CBR 600 F(4)X

1 Answer

Grinding noise

If the 'grinding' only happens when the bike is in motion, the problem is probably not inside the engine. Remove the chain and then start the motor. Put it in gear(s) and listen for the noise. No noise eliminates the engine as the problem.

Now lay the chain on the concrete and 'compress the chain in a straight line. Mark the end of the chain on the concrete. Now hold on to one end of the chain and stretch the chain. Did it stretch more than one inch? Replace it if it did. Look at the chain. is it rusted? Is it limber or do the links resist bending? Replace the chain if rusty and stiff.

While you are doing all this, check the rear wheel. Does it spin freely. Make any noise? Does the rear brake go on and off properly? Next check your sprockets. A bad sprocket will ruin a new chain. The ends of the teeth on the sprocket should be rounded. A worn sprocket shows pointed teeth. I have seen teeth so pointed they could pop a balloon. LOOK at both sides of the front and back sprockets. Are they rubbing against anything anywhere? Look at the chain, any rubbing? Is the tire rubbing on anything? Did the prior owner install heavier sprockets and bigger chain than stock sprockets and chain? > Check with the dealer.

Chances are you will find the problem if you do the above.
I hope you can rate this solution as a 'FixYa".

Mar 20, 2009 | 2005 Derbi Senda R 125 4T

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