YS 140 DZ going lean in -ve g manoeuvres

[PENNISI Peter]

Hi all,
 
 
My DZ has only returned from holidays in Japan were it was repaired by YS
from another cam failure.
 
 
The engine is running absolutely superb except when you pull high negative g
manoeuvres like the reverse humpty bump it gets a little lean for a few
seconds put it does come good.
 
I have re-plumbed the model put the problem is still there. 
 
Running
 
APC 16 x 12
OS F plug
Tetra 20 oz tank with OS sintered(Spelling) bubble less pickup.(Yes the
expensive one)
Hatori exhaust (698 pipe)
Coolpower 30% heli blend
Model is ZN-LINE Alliance.
 
Any suggestions
 
 
Peter
 
 

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Thank you.


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