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Old 03-04-2016, 09:37 PM
Strider Strider is offline
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Default Cbr600 ....

I am tearing my hair out with a problem with my sons 1997 CBR

I ran the bike for 4-5 months without any problem while waiting for him to get old enough to do his DAS, I then fitted new fairings and gave it to him (BTW the old fairings are for sale, the odd chip and mark, but never been down the road)

One of the issues is that I live 145 miles away from him and he has got so pissed off that he has now got a Triumph TT600 and I get the Honda back, Its coming back here next week. I have been up there to try it and do what I can, but you know how its easier when you are in your own garage with all your bits and bobs. That's why some of the work has been done by the shop up there.

Back to the bike problem.
It's fine whilst its in neutral, revs up no problem. For the first couple of minutes on the road, again no issues. then it starts to die and kick in and die and kick it, but wont rev up, if you are very very gentle with the throttle it will pick up speed. So the problem is when the bike is under load.

Its had a new fuel pump fitted and fuel pump relay (supposedly), when they were fitted, an in line filter was also put in in case any shit was getting into the carbs. He picked it up from there and it ran fine for about 15 miles and then started with the problems again.

My thoughts are to replace the plugs and change the HT leads for starters, its a cheap start and wont do any harm anyway. I'll check the breather (again) and I am also wondering whether to take the in line filter out, after all there isn't one as standard, is there?

Coils getting hot and breaking down? Even silly things like a dodgy connection on the side stand switch?

Normally I can work out where to start with something like this, but I'm a bit stumped, is it fuel or electrical?? Any thoughts gentlemen?
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Last edited by Strider; 04-04-2016 at 05:10 PM.
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Old 04-04-2016, 06:20 AM
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Friar Tuck Friar Tuck is offline
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I'm definitely no mechanic but I think it could be fuel starvation if it dies under load. Carb bowl height may be? Or wrong needle jet settings?
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Old 04-04-2016, 08:48 AM
wiskers wiskers is offline
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Inline filter if it's the gauze type it should be ok

I'm useless when it comes to the newer bikes I know 97s not new but it's modern for me so bare with me

Don't CBR 's have a filter n the tank? Could this be clogged

Could be the spark breaking down under load but as it ran fine for 15 miles i don't think so

Back to fuel has he possibly picked up contaminated petrol from somewhere if the inline filter is the chunky paper type and has got contaminated with water that could be the problem them bloody thing's hate water, it the inline filter is the gauze type they will let water pass into the carbs giving the symptoms you describe, drain the float bowls and check, a glass jar makes it easy to spot water in the fuel

Side stand switch usually will cause the bike to stop dead

Changing the plugs won't go amiss but i have a feeling the problem is fuel related

Hope that helps Dai

Edit, could it be something as simple as a blocked tank breather try running it with the fuel cap undone I still can't spell that fucking word that means not tight fuck fuck fuck bollox
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Last edited by wiskers; 04-04-2016 at 09:33 AM.
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Old 10-04-2016, 08:28 AM
Strider Strider is offline
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Checked the carbs for water, had a mate come round to give a second opinion and he felt it was either coils breaking down after they get hot or the CDI unit. I was able to get a CDI unit at a local breakers (wonderful place, old school with hundreds of bikes and stuff stacked 20 feet high).

Put it on and have just been out to test it .................
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Old 10-04-2016, 08:37 AM
wiskers wiskers is offline
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As I said i'm not good with modern bikes

Great news though well done for finding the problem

Happy day's dai
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Old 11-04-2016, 04:41 AM
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I'm the last person to ask about running problems...

Glad you got it sorted.
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Old 11-04-2016, 06:00 PM
Strider Strider is offline
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Should have said where the breakers were, in Chorley .......

Berties bike breakers http://www.bertiesbikebreakers.com/
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