Question about 2004 kawasaki GPZ 500 S - GPX 500 R

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Engine surging/hunting on a 1996 GPZ 500 between 5 and 6 thousand revs. OK up to and beyond that rev range. Help please!

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Check carbs and throttle, clean float chamber. Jets are factory fixed so try second hand carbs rather than mess with these

Posted on Aug 02, 2009

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Car idles at 500 rpm now does not start

Check your igniting system,, and your fuel system

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Starts ok, although seems to be missing slightly, sluggish throttle response and wont rev beyond 4 thou ,

Check plugs, may be fouled> When storing bikes in my old mans garage, the plugs always foul

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2001 buick century if throttled up at the engine runs great but if throttled up by the throttle pedel it begins to surge

This car should have a throttle positioning sensor. Have you had the codes run on your vehicle. Free at most local auto parts centers

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Idle surging up and down from 500 revs to 1000 rev

As Always,variations in RPMs call for looking for a vacuum leak.If none found,clean the MAF sensor with brake cleaner spray and let dry totally.don-ohio

Oct 26, 2011 | 1996 Ford Explorer

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I have a gpx600r on a g plate which on low revs

first do a compreshion test on the engine it may be one of the pots is low on compreshion,, ie: a velve has burnt out or is leaking badly or it may be that the carbereters need to be striped down and the slow running jets need to be cleaned out,, if its a slow running jet blocked it wont run at low revs on that pot

Feb 19, 2010 | 1989 kawasaki GPZ 500 S - GPX 500 R

1 Answer

The bike starts up but will not rev up when

Has it been sitting for a long time (a year or more)? If so, then the carburetors are plugged with fuel varnish and need to be disassembled and cleaned out. If it runs better with the choke on, this is a sure sign that the carbs are plugged.
If it hasn't been is storage, then try draining the fuel from the float bowls. Sometimes an accumulation of water in them will get to the point that fuel will no longer be drawn through the jets. Also make sure that the valve tappet clearances are set correctly and make sure there are no air leaks between the carburetors and the engine (with the engine idling, spray WD-40 around the intake manifolds, any change in idle speed indicates an air leak).
Finally, if all of the above fails to remedy the problem, perform a compression check on the engine. With the throttle wide open, you should see at least 140 psi of compression in each cylinder. Less than that means the engine needs serious mechanical attention.

Nov 10, 2009 | 1989 kawasaki GPZ 500 S - GPX 500 R

1 Answer

Engine speed hunts on idle. Auto trans slow shift.

The fast idle valve is inside the throttle body. Sometimes it backs out and needs turned back in (it's threaded). This will cause the loping idle.

Get transmission filter changed with new fluid. Honda does not recommend transmission flushing.

Sep 17, 2009 | 1988 Honda Accord 4 Door

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Overheating and spits fuel out from the exhaust pipe

id check the float in the carb is not getting stuch first of all

Jun 05, 2009 | 2003 kawasaki GPZ 500 S - GPX 500 R

1 Answer

My quatro 4hp engine is running erratically

sounds like you need to have carb rebuilt, or have a vacuum leak

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