Question about kawasaki Z750 Motorcycles

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Extremely hard to start

Had the carbs checked,ok
new plugs
seems to foul plugs during operation

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Maybie you need to give the valvs more clearence

Posted on Feb 16, 2009

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This could be one of many things....to rich gas oil mix...also it could be you need to increse your air intake.and..your fuel jets may need cleaned! hope this is of help!

Posted on Dec 10, 2008

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1 Answer

Gpx 750 carb


It sounds like you are an experienced mechanic, but sometimes the most obvious problem is something else. Sometimes the plugs will foul out, and it seems like a fuel issue. Why don't you check your plugs. My plugs fouled out at 4,000 miles. I was still under warranty so I didn't work on it myself, but to me it seemed like fuel. A new set of plugs fixed everything.

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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

Mar 29, 2013 | 1995 kawasaki GPZ 1100

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Bike sat up for 3 or 4 years. recently cleaned the carb, changed the plug and oil and bike started. Tried starting it recently and it wont. Seem to be backfiring sometimes when kicking it over.


clean plug .. although new plug if old fuel or unbalanced carb it may quickly foul. if this works you may need help to work out whats causing plug to foul.

Mar 10, 2013 | 2001 Yamaha YZ 426 F

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Cpould you please tell me where are the ground wires on 2005 xl 1200c. Also, same bike has 34000 miles all stock, except big ******. started acting like carb problem earlier this year. I am in NW corner...


it sounds like a vacuum leak somewhere. You have a VOES switch on that bike. It's located behind the switch on the left side of the bike usually. There is a vacuum hose that comes from the carb and goes to the VOES switch and the vacuum operated petcock. Check the hose for cracks.

Also, I have seen the vacuum operated petcock do the same thing. Somehow it starts sucking air around the diaphragm creating a vacuum leak. You can take the petcock apart and inspect the diaphragm and replace it if necessary. I'd rather replace it with a high quality manually operated petcock like a Pingle or something.

Good Luck
Steve

Aug 29, 2010 | 2005 Harley Davidson XL 1200 C Sportster...

1 Answer

Engine hard to start gets hot and no power checked carbs their ok


fouled spark plugs...intake manifold leak... you could have a vacuum line come off or isnt on all the way. bad batch of gas..weak coils, or poor compression. or the choke could not be operating properly. also running too heavy an oil could cause this problem, you should run 10w40 only.

Oct 05, 2009 | 1989 Suzuki GSX 550 EF

2 Answers

Yz450f that quit running


Yes, it does have an automatic decompression mechanism. It is a centrifugally operated mechanism and it is EXTREMELY unlikely that is causing your problems.
The two highest probabilities are:
1. Fouled spark plug. Forget what it looks like, put a BRAND NEW plug in. It is the cheapest form of diagnosis you can do. These bikes are terrible about fouling spark plugs and a fouled plug produces the exact symptoms you described.
2. Inspect your valve clearance. Tight valves will also make the bike hard/impossible to start with the kick starter. In some cases, it can be push started, but still won't kick. With tight valves, the bike, although hard starting, will run pretty good, for awhile. Eventually it will burn the valves and quit running though.
If your bike isn't kick starting fairly easily, something is wrong and needs to be addressed. The only other issue is making sure the idle speed is set per the service manual. These bikes have a fairly high idle, some as high as 1700 rpms. If it is set too low, it makes them hard to start too.

Sep 11, 2009 | 2004 Yamaha YZ 450 F

1 Answer

1977 cb 750 honda start and idle seem ok but bad loss of power


Check if the points plate is within the marks, it sounds as if the ignition timming is behind ( r e tard).
Recheck the valve clearance and the float level in the float chamber of the carbs, synchro the carbs and reset the air - mixture .
Hope this helps!

May 24, 2009 | 2005 Honda CB 750

1 Answer

Bike won't start 92 yamaha fzr 600


Sounds like the plugs are fouled out, I would pull them and make sure they're about the color of a paper bag. If they're all sooty and wet you most likely have a rich condition. I would take the carbs out and clean everything and pop in a new set of plugs. I have a 87 Fz600 that was acting up until I cleaned the carbs.

Apr 20, 2009 | 1994 Yamaha FZR 600

2 Answers

My FZR600 won't start. No mods, all stock. I got it a month ago and it had been stored over the winter with no stabilizer. It wouldn't run, so I cleaned out the tank, made sure the fuel lines were clear,...


These things are really temperamental.The plugs are fouled again..I had the same bike and went through the same thing..It doesnt take much to foul them..Get some new plugs and she'll run like a beaut..Just remember not to choke it to much..Thats where the plug fouling happens the most..Always keep a spare with you and you'l always be on the good..It will work!!Have a great night!!!!!!!!

Apr 03, 2009 | 1989 Yamaha FZR 600

1 Answer

Spark plug fouling when cold starting


sounds like the carb wants cleaning and re-balancing

Jan 24, 2009 | 1996 Yamaha SZR 660

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