Question about 1998 Honda CBR 400 RR

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Spark plug gap

What should the spark plug gap be on a 1991 honda cbr 400rr?

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  • Anonymous Mar 21, 2014

    spark plugs are black ,setting is 31 to 35 have them set at 33 what to do?

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Don't change the setting on the plug. The 400's are happiest when you just plug in new ones and ride. They like NGKs the best. There are two types for the 400. One runs hotter. This choice will depend on which country you live in and what the ambient temperatures are.

Posted on Nov 10, 2008

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1 Answer

I hav a honda cbr1000f 91 and the spark is very weak what would it be as i hav changed the coils and plugs already


Your new coil is problem. Please replace it or just use the previous one if it still good.

Feb 05, 2011 | 1991 Honda CBR 1000 F

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I have problem with my 1991 cbr 1000f, I changed the spark plug and now I don't know how to put the cables back on the right way, if someone can help me and tell me what order I plug the cables back, I...


these are dual spark coils. this means that each coil sparks twice on companion cylinders.two leads out of one coil to the two middle cylinders and the two leads out of the other coil go to the two outside cylinders it doesnt matter which coil,but usually one of them has two long leads and the other two shorter leads

Jan 16, 2011 | 1991 Honda CBR 1000 F

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Mar 09, 2010 | 1990 Honda CBR 400 RR

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I changed my spark plus and noe my k-1 will not start. what is the correct spark plug gap for it. and if that does not work what should i do next


Spark plug gap maladjustment will not stop the engine from starting. It will however produce misfiring or rough idle. More than likely, a spark plug cable has stopped making contact. Check the cables for continuity from the coil end, to the spark plug cap end. And also, if the spark plug terminal at the top is making contact with the cap. Check if your plugs are supposed to operate with the bare screw, or the adapter cap.

Dec 06, 2009 | 1989 Honda CBR 600 F(1)K

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Hi my honda cbr 600 fl 1991 the bike pulls great


im not sure if this model has a fuel pump but follow your fuel line and see if it does wen u find it remove black plastic cap and check the points contact breakers are in good conditon ie not worn uneven or worn out and that they open and close.check your air filter spark plugs and your carbs could have a blocked jet so get them cleaned and balanced.

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Compression tester reading on cbr 400rr


In general, as high as possible. But the real test is how close the readings from the cylinders are to each other.

May 09, 2009 | 1991 Honda CBR 400 RR

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My 2000 honda cbr 929 rr will not start


Did you gap the plugs to factory before installing?
check also the plug wires are properly seated.

Mar 16, 2009 | 2000 Honda CBR 1000 F

1 Answer

Wont start


the old petrol has buggered up the jets a good carb cleaning will fix the carbs now drain the old petrol out and get new dont try to mix old and new gas it does no good please give us a rate hope this helps

Jan 03, 2009 | 1988 Honda CBR 400

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