Saito 80 GK problem
08-02-2007, 01:33 PM
#1
Saito 80 GK problem
My Saito 80GK has had the following done to it:
Valves adjusted to correct clearances and rechecked.
Needle valve/spray bar upgrade installed.
Intake gaskets replaced (part of needle valve/spray bar upgrade kit )
All fuel lines, including lines inside the tank) replaced
All engine bolts double checked for tightness.
The Problem:
The engines surges at 3/4 - full throttle.
My idle is 2550 - 2600 (low speed screw out about 3 1/8 turns ). The idle is not near as smooth as my Saito 72, 82 or OS 52 Surpass.
MAX rpm with a 13x6 APC and Powermaster 15% nitro is 8400 - 8575 rpm. (Should be in the 9500 - 10,000+ range )
High speed needle is out about 2 3/4 - 3 turns.
If this is any help, this particular engine trys to backfire a lot when starting compared to my Saito 72 and 82.
I have a gut feeling the low rpms and the surging are connected (but my gut has been wrong before
)
Any ideas/suggestions ?
Valves adjusted to correct clearances and rechecked.
Needle valve/spray bar upgrade installed.
Intake gaskets replaced (part of needle valve/spray bar upgrade kit )
All fuel lines, including lines inside the tank) replaced
All engine bolts double checked for tightness.
The Problem:
The engines surges at 3/4 - full throttle.
My idle is 2550 - 2600 (low speed screw out about 3 1/8 turns ). The idle is not near as smooth as my Saito 72, 82 or OS 52 Surpass.
MAX rpm with a 13x6 APC and Powermaster 15% nitro is 8400 - 8575 rpm. (Should be in the 9500 - 10,000+ range )
High speed needle is out about 2 3/4 - 3 turns.
If this is any help, this particular engine trys to backfire a lot when starting compared to my Saito 72 and 82.
I have a gut feeling the low rpms and the surging are connected (but my gut has been wrong before
)Any ideas/suggestions ?
08-03-2007, 07:02 AM
#2
Join Date: Apr 2006
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RE: Saito 80 GK problem
Campy,
FWIW, I've learned here on RCU about Saito engines that the low speed needle valve should be +/- 1/16" in from being flush with the side of the throttle arm. I hope you get your problem fixed soon.
Fly safe and have fun!!
David
FWIW, I've learned here on RCU about Saito engines that the low speed needle valve should be +/- 1/16" in from being flush with the side of the throttle arm. I hope you get your problem fixed soon.
Fly safe and have fun!!
David
