Question about 1999 Yamaha YZF-R1

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Battery gets overheated when i reached 140-150 km/h or around more that 5k rpm

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Over charging possible rectifier problem. Also check the battery fluid levels if the plates are exposed they you are just frying the battery.

Posted on Apr 06, 2011

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Posted on Jan 02, 2017

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2011 Laro that is lucky to do 60-65 km. I've had the carby fully serviced, new plugs, new ODI switch, coils and it still doesn't go any faster than 60 km flat out revs at 3000 rpm and that's it.


Hi, Bungi if it's not electrical, ignition or cam timing, or a compression issue then all that's left is fuel and the usual suspects are:
1. Idle speed improperly adjusted.
2. Inlet system air leak.
3. Damaged or restricted fuel tank venting system.
4. Dirty or damaged air cleaner element.
5. The accelerator pump is inoperative.
6. Vacuum piston assembly malfunction.
7. Enrichener valve is not seated or leaking.
8. Restricted fuel supply tract.
9. Plugged bowl vent.
10. Loose or plugged fuel and air jets or passages.
11. Improper float level.
12. Worn or damaged needle or needle jet.
13. Loose or plugged main jets or passages.
For more information about your issue please click on the blue links below. Good luck and have a wonderful day.
Help diagnose my bike Won rev past 3000rpm motorcycles
Wouldn rev above 3k rpm now won start
Bike doesnt rev past 4 5k rpm
Life On 2 Wheels
http://www.cycletorque.com.au/laro-cruiser

Mar 15, 2017 | Motorcycles

1 Answer

How do I lower rpm so idle is correct? it's stable around 5k rpm which is too high


Yea, that is way too high. Thankfully your bike is nice and old so idle adjustment is simple. Look for a knob in between the 2nd and 3rd cylinders carburetors. This should be accessible without removing any bodywork, but I'm not certain with your bike. You should set your idle to something between 1~2k rpm when the bike is fully warmed up. If your carb hasn't been serviced in awhile having it idle at 2k rpm will be more stable.

Mar 11, 2015 | 1988 Suzuki GSX 600 F (Katana)

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The RPM of my engine remains at 4000 while my speed is 120 km/hr


I guess that you have a manual transmission. If that is the case you have a clutch on the way out. Slow slippage that gets worse as the plate gets hotter. If an automatic it is possible that the overdrive is not holding due to low pressure in the box. Have a pressure test done on the box--- have the fault codes read. From experience 120 kph is around 3200rpm for most cars and the 800 rpm difference indicates that the o/dive is not working as it should.

Apr 02, 2013 | 2000 Toyota Camry

1 Answer

When i accelerate 1500 rpm in my 1998 wrx ( ej207) it accelerate very good but when RPM reach 4500rpm the acceleration decrease ?


it sounds like a problem with your computer and will need to be hooked up to a computer with diagnostics info for wrx

Jan 14, 2013 | 1998 Subaru Impreza

1 Answer

Faulty oil pressure sensor


I would scan the system for fault codes.

Jun 15, 2017 | 2002 Isuzu Trooper

2 Answers

Changing engine oil every 5000 KM or every 2500?


The service duration is affected by many things.. If you are driving in a dusty atmosphere or doing a lot of high RPM but low gear driving, change the oil every 2500kms. if you do mainly highway driving with low rpm but top gear, change the oil every 5000 kms. As a rule, I always replace the oil filter at every oil change even though toyota says you dont have to.

Apr 02, 2010 | 2003 Toyota RAV4

1 Answer

No power at 3000 rmp


Have the machanic check the catalyst converter.

Aug 04, 2009 | 2002 Land Rover Freelander

1 Answer

2001 929 starter not working, big electric/mecanic noise,


check the battery voltage with a multimeter, it should read approx. 12 volts. with the meter connected to the battery turn the key to on, turn on brights, turn signal and press brake lever. if goes below 9 volts, charge the battery and try again. if still goes below 9 volts replace the battery. when you get a good battery, start the bike and check charging voltage. should be around 14.7 volts at 5k RPM. if you have low charging voltage, let me know.

Mar 10, 2009 | 2001 Honda CBR 929 RR Fireblade

1 Answer

Sudden high acceleration


Either a vacuum hose is hooked up wrong or a vacuum leak. Also make sure it's not leaking around the carb base. You can spray carb cleaner around the base while the engine is running. If the rpms drop then you know you have a leak there. Dont spray a lot, just enough to wet the area some.

If you have to stock Hitachi carb its a miss or go when have one rebuilt or buy one rebuilt. There's no new ones out there unless you got really really really lucky. There's only so much of the carb that can be replaced (usually never the electrical compononts) and if it was ever rebuilt correctly.

Jan 05, 2009 | 1987 Suzuki Samurai

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