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Author: Subject: Slight misfire / Hesitant
Jasmcauley
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posted on 4/4/14 at 12:26 PM Reply With Quote
Slight misfire / Hesitant

I have an MK Indy Blade

it has a CBR 900RR Fireblade 918/919CC engine

it pulls really well in first and second, but as soon as I get to about 60-70MPH

it seems to be a little hesitant, almost like a missfire at about 70MPH and doesn't want to pull any more.

I have bought new spark plugs to fit this weekend, and I was going to try and change the fuel filter but the one I have isn't like for like so it isn't long enough without changing the pipe work.


Any other suggestions?




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davidimurray
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posted on 4/4/14 at 12:45 PM Reply With Quote
Try balancing the carbs/TBs.




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mark chandler
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posted on 4/4/14 at 06:54 PM Reply With Quote
When I changed the exhaust on mine it had similar issues, have you changed anything, exhaust/inlet as these engines are very sensitive, went from standard R1 can to straight through, to address i fitted a dynojet kit.

New plugs are also a good start.
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matt_gsxr
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posted on 4/4/14 at 07:43 PM Reply With Quote
Check the plugs before replacing them. Might indicate that one carb has restricted flow.
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Jasmcauley
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posted on 5/4/14 at 08:07 PM Reply With Quote
Many thanks guys.

Runs like a dream up to 75ish so I'd imagine it's only something Small

I will check the plugs tomorrow and see if I can see any evidence of a restrictive carb.




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