Question about 2004 Suzuki RM-Z 250
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Posted on Jan 02, 2017
Several things here. Do an oil change, 10w40 motor oil. Run premium gas and install a new NGK spark plug one heat range colder than stock. It sounds like you have an air leak causing a lean fuel mix. Check the carb mount bolts and the intake manifold bolts for tightness. Also set the valve clearances with a cold engine > .002 intake and .003 exhaust. Check for any cylinder head leaks. This would show up as oil on the cooling fins at the base of the cylinder head. Tighten the head bolts if needed.
Posted on Apr 28, 2009
Like I told somebody earlier to day lower the octane rating of the gas you are using....repost if you need anything futher......
Posted on Jun 22, 2009
SOURCE: 2005 Rmz250 wont start when hot.
YOUR BIKE HAS A POWER VALVE (DIAPHRAM FUEL PUMP) THAT GIVES A SHOT OF GAS EACH TIME THE THROTTLE IS TWISTED. WHEN THE BIKE IS HOT, IT FLOODS EASILY. DON'T HIT THE THROTTLE WHEN STARTING THE BIKE WHEN THE ENGINE IS HOT.
Posted on Jul 31, 2009
sounds like maybe valves were shimmed too tight,check service manual for clearances...better a little loose than too tight,can cause alot of damage to cam & head,be careful!!
Posted on Oct 19, 2009
I have an 05 with the same problem. Sounds like your STVA went out. Do you still have your butterflies wired open? I know how to repair the stva fixed mine, and saved hundreds....if your still on this post email me so we can get our bikes fixed. also check your kick stand sensor! This can malfunction and cause same stalling problems.
Posted on Aug 01, 2012
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