engine ignition timing sweet spot

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hellfire racing
Posts: 3
Joined: Mon Apr 09, 2018 9:41 am
Rides:: c90 sports moped

engine ignition timing sweet spot

Post by hellfire racing » Sun Apr 15, 2018 10:31 am

C90 ignition ? timing
as the timing is a fixed pick up point ..
What is the best ignition advance for these engines please
the motor is running a long dwell cam with slightly higher lift.
C70 high comp piston and
ct 70 big valves in the head with 24 mm inlet carburetor
my thinking is about 25-38 degrees btdc
Also is the oil take off plate that sits on the head able to be used to feed a remote oil tank?
any thoughts and prior knowledge of this or similar set up information wold help with initial set up.. :?: regards in advance

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Alan CF
Posts: 5968
Joined: Mon May 09, 2011 6:10 pm
Rides:: MOT 18/6/18 TAX 31/5/18 INS 10/8/17
Location: CHESTERFIELD

Re: engine ignition timing sweet spot

Post by Alan CF » Sun Apr 15, 2018 11:06 am

hellfire racing wrote:
Sun Apr 15, 2018 10:31 am
Also is the oil take off plate that sits on the head able to be used to feed a remote oil tank?
Good idea, But Have you increased the oil pump.

hellfire racing
Posts: 3
Joined: Mon Apr 09, 2018 9:41 am
Rides:: c90 sports moped

Re: engine ignition timing sweet spot

Post by hellfire racing » Tue Apr 17, 2018 6:51 am

how does one increase the oil pump flow? :shock:

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Alan CF
Posts: 5968
Joined: Mon May 09, 2011 6:10 pm
Rides:: MOT 18/6/18 TAX 31/5/18 INS 10/8/17
Location: CHESTERFIELD

Re: engine ignition timing sweet spot

Post by Alan CF » Tue Apr 17, 2018 7:06 am

With the honda GBG OIL PUMP, Part numbers 15100-GBG-931 you will have to drill the oil hole out next to the bottom stud,
Depending what cases your using you will have to increase the galleries behind the pump.
12v c90 cases you dont, But c50/c70 im sure you do.

there is a guide in the how to section on these pages.

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