Question about 2007 Aprilia SR 50 R Factory

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Aprilia sr50 variator assembly

My sr 50 starts but after about a minute it cuts out and smoke came out the side casein next to the kirk start and it doesn\'t have full power now. Can u pls help.

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Hi, Deane you may have squeaked your top end this is commonly known as "HEAT SEIZE" the piston heats up expands and becomes extremely tight in the cylinder bore and usually occurs mainly on 2 cycle engines right after a fresh top end rebuild, but it can also happen to brand new motorcycles, these are rare instances due to better quality control and education. Overheating failures that cause pistons to seize are many and each one should be carefully diagnosed to prevent future repeat offenders and the usual suspects are:
1. Loose fasteners causing intake or base gaskets to leak or crankshaft seal failure caused by age, overheating, or walking.
2. Improper assembly of reed valve gaskets.
3. Improper oil/fuel premix ratio.
4. Broken, pinched, or cracked fuel line.
5. Carburetor fuel passages clogged or restricted from stale fuel varnish, ethanol sludge, dirt, rust, or fuel level in float bowl too low.
6. Main jet size too small.
7. Air filter improperly installed, missing or not sealing.
8. Faulty or improperly adjusted oil pump and or cable.
9. Failure to bleed oil pump after running oil tank dry, rebuild of pump or replacement
10. Among the causes of lack of cylinder, lubrication is clogging of lubricator by dirt or waste, obstruction in oil pipes/lines, leaky check valves, leaky pump packing, broken oil pipe/line, oil too cold to feed.
11. Wrong type of oil used in premix or oil tank
12. Improper spark plug heat range (too hot) and or gap.
13. Ignition timing retarded, faulty CDI.
14. Excessive engine load, brakes dragging, clutch slipping, transmission lubricant level too low or viscosity to high.
15. Engine coolant level too low, too old, or improper mixture ratio.
16. Engine coolant pump failure, damage, or passages restricted.
17. Radiator clogged, fins damaged, or faulty cap.
18. Failure to follow proper break in procedures.
For more information about your issue, please visit the websites below. Good luck and have a nice day.
https://www.tradebit.com/filesharing.php/search/0/2007+aprilia+sr+50+r+factory

Posted on Oct 25, 2015

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Posted on Jan 02, 2017

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SOURCE: aprilia sr 50

if you hear a hum while tryimg to start then the starter is okay the problem will be in the main or secondary(upper or lower idle gear) starter gear

Posted on Apr 23, 2009

  • 9 Answers

SOURCE: need to know how much oil is in the forks of an aprilia sr50 please

front fork capacity is 285 cc per leg, but you need to take the spring out and fully extend the forks and measure 140mm from the top and thats where your oil needs to sit.

Posted on Aug 02, 2009

mckinleylowe
  • 1 Answer

SOURCE: aprilia habana 50 starts fine but dies when i

i have a aprilia mojito 50cc scooter it start ok but then i ref it it cut out straight away and hardly now power to it ?

Posted on Apr 13, 2012

  • 2 Answers

SOURCE: aprilia sr 125

try the rollers thay could be worn but bike on stand and rev it up if its better defo rollers

Posted on Dec 22, 2012

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