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Cooper Struggling To Rev High! Help!


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#1 JMini

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Posted 22 August 2012 - 01:32 PM

Hello anyone!!

Havin troubles with my Mini at the moment...took the rat to Santa Pod for MITP recently and had no power and no revs!!! Was running well last year before i garaged it for the winter (75bhp on the RR).

Was hating the trip back from Santa Pod, my m8s Red Hot 1000 was on my tail the hole time!!!!

IS there any obvious areas to check? I thought it could be the SU carb might need stripping. Had a compression test and all is fine that end. Dont know where else to look. CAM??

Any advice would be great

Cheers all.

#2 JMini

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Posted 22 August 2012 - 01:34 PM

sorry. Is a Cooper with 1275A+ SU CARB+K&N. SC GEARS. ALDON ELECTRIC IGNITION.

ta

#3 jimnali

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Posted 22 August 2012 - 05:12 PM

ignition timing?

#4 JMini

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Posted 22 August 2012 - 08:05 PM

Im thinkin it cud be somethin in that area. changed from points to electronic ignition using an aldon kit, but stayed with the same coil, and leads. Does that matter.

I did fit an su mechanical fuel pump, could it be fuel delivery?

Thanks again for any help

#5 Carlos W

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Posted 22 August 2012 - 08:07 PM

If it's stood for a while it'd be worth cleaning the carb

#6 sonikk4

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Posted 22 August 2012 - 08:07 PM

It could be rotten fuel. Unleaded does not last very long so it may be down to that if you have not touched anything else.

#7 firefox

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Posted 22 August 2012 - 08:14 PM

If you have a ballast resistor going to the coil for the points you had, you should have changed the coil to one for electronic ignition, put a multimeter from live on the coil and other end to earth on the engine turn on the ignition, if it reads about 9 volts it is ballast resisted, you need a wire from the top left fuse to live on the new coil which needs to be 1.5 ohms and 12 volt for electronic ignition
forgot to say if you are resisted you need to remove the resisted wire from the coil
think it is white and pink

Edited by firefox, 22 August 2012 - 08:34 PM.


#8 JMini

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Posted 22 August 2012 - 08:30 PM

Cheers every1

Gives me a few more things to check over. Will be sumthin trivial no doubt.

Thanks again


#9 JMini

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Posted 23 August 2012 - 06:18 PM

Had the carb de-gunked today and new leads fitted. JOB DONE!!!!!

Thanks for the help!!!!





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