General SBK Discussion Thread

[tallkien]

And FYI : A tire which is bald in the middle and has plenty of rubber on the sides is said to have "chicken strips". This indicates that the rider doesn't lean the bike much while cornering.

Actually Not quite. Chicken Strips have nothing to do with tyre baldness, They're just the unused portion of rubber on the sides of the tyres of someone who's afraid of leaning the bike over. Typically this portion will be dusty and/or look shiny from little or no wear as compared to the rest of the tyre profile.

[Parth]

Actually Not quite. Chicken Strips have nothing to do with tyre baldness, They're just the unused portion of rubber on the sides of the tyres of someone who's afraid of leaning the bike over. Typically this portion will be dusty and/or look shiny from little or no wear as compared to the rest of the tyre profile.

i said the same thing buddy.....maybe i wasnt clear though

[Sarvajit]

Overfilling air will also lead to a smaller contact patch, and wearing out from the center.
For eg.my bike's manual says 28&33 psi, but I fill 30&35 psi, so the contact patch reduces&the tyre wears out more from the center.

[kinshuk.arya]

Overfilling air will also lead to a smaller contact patch, and wearing out from the center.
For eg.my bike's manual says 28&33 psi, but I fill 30&35 psi, so the contact patch reduces&the tyre wears out more from the center.

but that would lead to a bumpier ride and in the long run will increase the wear and tear of suspension system and your back...

[Greymatter]

Hi guys, Honda CB1000R has a 11.2:1 compression ratio so will it run on 91 oct (xtra premium) fuel?

[fireblah]

Dont think it would be a problem..

[ZeNashB]

Fireblade problems..

Okie guys, my friend has a small problem with his '02 Honda CBR954RR Fireblade. He got all the 4 spark plugs changed because two of the old ones had died and his cylinders weren't working at their optimum. He's put in a brand new battery after charging. When he started it, the bike was showing serious lag when he revved. He twisted the throttle and it wouldn't rev beyond the 3k RPM mark. Occasionally, it jumped to the right rev indication then lagged again. Stuttering and shivering all the time, he managed to move it for a km but it totally stopped after that. He filled the fuel tank thinking it was a low fuel problem but it persisted.

Whenever he twisted the throttle, even completely to its limit, it would just rev to 3k, not more... making weird 'bur bur bur' sounds. Soon after that, the battery showed the ''low'' indicator and in idling, th temperature suddenly rose to 107 and the bike shut down. He pushed it back into the garage and that's where it is now. What could be the issue?

[Old Fox]

Okie guys, my friend has a small problem with his '02 Honda CBR954RR Fireblade. He got all the 4 spark plugs changed because two of the old ones had died and his cylinders weren't working at their optimum. He's put in a brand new battery after charging. When he started it, the bike was showing serious lag when he revved. He twisted the throttle and it wouldn't rev beyond the 3k RPM mark. Occasionally, it jumped to the right rev indication then lagged again. Stuttering and shivering all the time, he managed to move it for a km but it totally stopped after that. He filled the fuel tank thinking it was a low fuel problem but it persisted.

Whenever he twisted the throttle, even completely to its limit, it would just rev to 3k, not more... making weird 'bur bur bur' sounds. Soon after that, the battery showed the ''low'' indicator and in idling, th temperature suddenly rose to 107 and the bike shut down. He pushed it back into the garage and that's where it is now. What could be the issue?

The symptoms apparently indicate that all cylinders are not firing. Reasons could be 1) loose spark-plug cap/s 2) faulty HT leads (the wires connecting the spark-plug and the ignition coils and 3) wrong firing order i.e the spark plug wires have been connected in the wrong order. Cylinder #1 gets plug cap #1, #2 gets plug cap no. 2 and so on. Check the bike's service/shop manual for correct assembly of plug wires or look up on some 954 forums on the net.

[ZeNashB]

The symptoms apparently indicate that all cylinders are not firing. Reasons could be 1) loose spark-plug cap/s 2) faulty HT leads (the wires connecting the spark-plug and the ignition coils and 3) wrong firing order i.e the spark plug wires have been connected in the wrong order. Cylinder #1 gets plug cap #1, #2 gets plug cap no. 2 and so on. Check the bike's service/shop manual for correct assembly of plug wires or look up on some 954 forums on the net.

Hmm, very valid points you've made since he had got the plugs changed the same day. The mechanic might have not done his job properly. I'll ask him to check the plugs/HT leads tomorrow.

Its an awesome bike, before this happened. I'm sure it can be fixed Thanks

[navalds]

Hmm, very valid points you've made since he had got the plugs changed the same day. The mechanic might have not done his job properly. I'll ask him to check the plugs/HT leads tomorrow.

Its an awesome bike, before this happened. I'm sure it can be fixed Thanks

Also if i may add old fox sir, could be the injectors n throttle body that require cleaning? someone here had a similar goof up with gixxer, throttle body and injector cleaning solved the issue!

[Old Fox]

Also if i may add old fox sir, could be the injectors n throttle body that require cleaning? someone here had a similar goof up with gixxer, throttle body and injector cleaning solved the issue!

Could be so Naval, but I am working on the premise that dirty throttle bodies and clogged injectors don't happen overnight. Even clogging of injectors gives plenty of prior warning. The fact that mere changing of the plugs messed up the bike points to that area. Also that the bike overheats within a short time.

[fireblah]

@ OF: Why would the bike get hot if there is some problem with spark plugs? like caps interchanged, or the others like all cylinders not working ?

[ROCKRZ]

as OF rightly said, it could be because of the wrong firing sequence of engine with the leads interconnected at the wrong plug. this happened with my car once and hence can corelate this..

[Hyperion]

@ OF: Why would the bike get hot if there is some problem with spark plugs? like caps interchanged, or the others like all cylinders not working ?

I guess it could be because the cylinders that are working will be overloaded and start overheating.
I had a similar problem when one of the cylinders on my bike stopped working/misfiring. This caused the CatCon overheat and it started glowing orange.

[ZeNashB]

Yeah, its constantly heating up now. The temperature stays between 98C and 102C. Its definitely gotta be a problem with a wrong firing order which is causing the cylinders to be overloaded, hence the heating.

Also, he took it out for another ride to determine what else is wrong, and discovered some extra problems now.. The throttle doesn't respond if he suddenly twists it, but responds fine if he does so gradually. The bike shudders a little at 2k-3k rpms then becomes fine again. It no longer revs beyond the 7k-8k mark either.

They are only due to the wrong timing?