Cafe Racer not starting - Page 2
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Thread: Cafe Racer not starting

  1. #11
    Member martinpanti's Avatar
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    please let us know the resolution.

  2. #12
    JF8
    JF8 is offline
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    Yes as soon im able to resolve the problem, and now I have extra problems with the bike, as last night was really heavy rain and wind the bike fall on its side to the concrete. The scratches on tank does not suit otherwise candy gold tank.

  3. #13
    Senior Member Engenia's Avatar
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    Errol Kowald
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    Quote Originally Posted by JF8 View Post
    Propably now I have to check because the problem is now narrowed down to be fuel related cause with ignition spray it will try to start even little bit.
    Not necessarily. If it is too lean you'l get nothing. For instance, if the AFR at normal starting is 11:1, halving the pressure will change the AFR to 22:1 and that will not ignite with a spark.
    hooroo, Errol www.engenia.com.au [136,351 km - and counting .....]

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  5. #14
    Member martinpanti's Avatar
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    Engenia, I can only keep the bike running (poorly still) if I add small bursts of spray from a starter spray so I measured the fuel pressure and got max of 18 psi. I understand that the pressure should be somewhere around 45 psi or 3 Bar. Bike sat in a warehouse before I got it and rebuilt it. I installed a new fuel filter, so it isn't an obstruction. Don't you think it would be the fuel pump?

  6. #15
    Senior Member Engenia's Avatar
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    Errol Kowald
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    Either the fuel pump or the bypass valve - which regulates the pressure.
    hooroo, Errol www.engenia.com.au [136,351 km - and counting .....]

  7. #16
    Member martinpanti's Avatar
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    Where does the bypass valve reside on the bike? I am not sure I have seen it before.

  8. #17
    Senior Member Engenia's Avatar
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    Errol Kowald
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    You wouldn't have, unless you have also seen the fuel pump. It's right next to it.
    It's simply a valve and a spring. Perhaps 10 mm diameter
    hooroo, Errol www.engenia.com.au [136,351 km - and counting .....]

  9. #18
    Member martinpanti's Avatar
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    Is it serviceable or will I need to replace the whole fuel pump assembly? Thank you for all your help.

  10. #19
    Senior Member Engenia's Avatar
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    Errol Kowald
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    No idea. I've never had one apart.
    Let us know what you find.
    hooroo, Errol www.engenia.com.au [136,351 km - and counting .....]

  11. #20
    Member martinpanti's Avatar
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    Funny thing. Nothing can be overlooked when looking for faults. I took out the fuel pump assembly and found that the 40mm long rubber tubing between the fuel filter and fuel pressure valve was completely deteriorated and falling apart, hence no pressure to the injectors.
    GBo likes this.

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