Slow dropping revs

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malsa
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Slow dropping revs

Post by malsa » Thu Apr 11, 2013 10:38 pm

On my kr1 The revs drop normally then pause at 3k and drop slowly an idle good, I've checked the reed blocks and carb rubbers,carbs thinking it was a symptom of an air leak but all seems fine. Checked all cables for sticking and checked float height etc. with no joy, am I barking up the wrong tree with the air leak?

Any advice most welcome

Thanks in advance. Darren

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JanBros
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Post by JanBros » Thu Apr 11, 2013 11:44 pm

probably just faulty air-screw adjustment.

to check airleaks : spray some brakecleaner arround the inletrubbers when the engine is running. if the rev's change, you've got a leak.

in my experience: the air-screw needs much less turning out then the manual says. only about 3/4 off a turn is a good starting point. and remember : they are at the back off the carb, so unlike "normal" air screws (= at the front of the carb), on these PWK's they regulate the air and not the fuel, so turning out = leaner, turning in = richer.
You know it's cold outside when you trip over dog shit instead of standing in it.

malsa
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Post by malsa » Sat Apr 13, 2013 7:12 am

Thanks janbros. Done air screws 3/4 turn out cured it, Soon as I go to 1 turn out starts holding the revs a bit, so ill leave it there,
How come they got 1 1/2 turns in manual ? I thought about turning them in before but didn't want to stray from manual.
Thanks again

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JanBros
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Post by JanBros » Sat Apr 13, 2013 12:06 pm

malsa wrote: How come they got 1 1/2 turns in manual ?
I don't know, I didn't write it :lol:
You know it's cold outside when you trip over dog shit instead of standing in it.

malsa
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Post by malsa » Sat Apr 13, 2013 9:44 pm

No shit Sherlock :lol:

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