Question about 1998 Honda XR 600 R

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Interupted power at times under load the bike is losing signficant power, however power will usually return after a period of riding or idling?

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  • jono_hopkins Jan 05, 2009

    yeah it is a bit hard to start, and i have looked any possible fuel issues such as the carby and fuel filter, so new plug sounds the go... cheers mate.

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Try installing new plugs, sounds like you you may have a fouled plug.  is the bike hard starting?

Posted on Jan 05, 2009

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My bike having no power under 3k rpm and sometimes while riding under 3k rpm suddenly the engine ceases for a mere fraction of second and again resumes. what causes this?


Hi, Radha my gut tells me it is a fuel issue start with # 13 the following applies to carbureted also fuel injected models and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture screw improperly adjusted.
10. Water or dirt in the fuel system, carburetor or filter.
11. Restricted, blocked or kinked fuel line.
12. Fuel tank empty.
13. The gas cap is not venting properly or fuel tank venting system blocked.
14. A failed fuel pump, pressure regulator and or fuel injectors.
15. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
16. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable "FREE" downloads that you need please click on the links below. Good luck and have a nice day.
http://www.championautoparts.com/Technical/Diagnostic-Center/DiagnosticCenter-Power-Sport/Poor-Acceleration.html
Why is my motorcycle losing power when accelerating
Pulsar 180cc Acceleration Problem Team BHP
http://www.bcmtouring.com/imp/Pulsar_DTSi_Workshop_Manual.pdf
Bajaj Pulsar 150 CC DTS User Manual

May 09, 2016 | Bajaj Pulsar 180 Motorcycles

1 Answer

My bike lost power but still idles good I think the valves need adjusted what are the specs


The valves having too large a gap will slightly affect power but not dramatically. Good idle but less power under load usually means poor spark for firing so check out your spark plug for a nice bright purple spark first. If the valves need adjusting you can really hear them ticking, like an old school VW bug
Valve gap is usually .002-.004 for intake valves and .004-.006" for exhaust

Jul 29, 2014 | Motorcycles

1 Answer

I have a 2000 r6 and the other day when I was riding the bike it started to lose power and mis fire then all of a sudden it was ok and made it home. I turned the bike off then tried to start it again but...


Check voltage at the battery terminals. it should be approx 13-14 volts when running at about 2000 revs. these are not specific to your bike , these numbers may be as high as 14.7volts or 3000 revs. revs are usually at just above idle. If the voltage at the battery terminals is below 13 you have a problem with your alternator or regulator/rectifier. Incidentally the battery voltage is DC.

Jun 27, 2011 | 2000 Yamaha YZF-R6

3 Answers

2009 Triumph speedmaster starting problem.


i had the same prob.after many calls to my triumph dealer it wAS FINALLY SOLVED.as i only ride short distance to and from work i was drawing more power during the shut down mode by the onboard comp thaen i was charging.mechanic got hie laptap and put it on "city charge".have not had the prob since. Paul Australia

Mar 04, 2010 | 2008 Triumph Speedmaster

2 Answers

Idles high drops to normal then increases again


either a vacuum hose has come loose or is worn/cracked, or you might have a leaking head gasket.
when engine is running at a normal idle,... spray some carb cleaner around hose fittings and the intake manifolds one carb at a time..if the idle goes up..there's your problem.

Oct 03, 2009 | 1998 Suzuki GSX-R 750 W

1 Answer

My ninja loses power in the wind


Do you have a "RAM AIR" system on that bike, if so that may be what happens when you ride into a headwind. The bike may be running a little lean and with the extra intake pressure goes too lean.

Jun 06, 2009 | 1999 kawasaki ZX-6R Ninja

1 Answer

Motorcycle dies while riding,like gas is cut off


Check fuel pump. You might have a bad diaphragm.

Jun 02, 2009 | 2002 Honda VT 600 CD Shadow

1 Answer

Losing power when it gets hot


are you turning off the choke after its warmed up? bike will not run right if the choke is left on and will seem like its losing power. if its off, then read on.

pull the spark plug and take a look at it. does it look like light brown toast (as it should) at the end that goes into the cylinder or does it look like it is brand new (still white)? if it looks brand new, then its indicating a lean condition and will run very hot (you may see evidence [blueing] on the exhaust pipe where it exits the cylinder head) and stop running. hopefully damage was not done to the piston (usually a lean condition will put a hole in the top of the piston). if its a lean condition, then read on.

so what's causing the lean condition? have you recently added a high flow air cleaner or after market exhaust pipes without rejetting the carb? or maybe you had to rebuild the carb, bought a kit from a dealer and the size of the jets were not correct? if you can return things to the "before" condition one at a time, then you can determine what change caused the problem.

good luck.

Jan 15, 2009 | 1987 Yamaha SDR

1 Answer

Bike trouble


Yes! You will open those things up, and they will probably look pretty clean, but the problem with your carbs is in the Idle circuit - too small for you to see into. If you do a search of carb cleaning or related topics, you'll see that alot of folks with cab problems try to clean their carbs ... only to have to open them up again due to improper cleaning (They are difficult to clean properly, require alot of patience) So, I would suggest that you have them cleaned professionally, or at least buy good carb dip to get them really clean. Spray cans of carb cleaner are worthless. Might as well wash em with dish soap.

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