When did Yamaha start using the yics system?
This chamber is sealed with a small hex-headed bolt (“plug”) and sealing washer at each end, and within the chamber has 4 individual tiny holes (or “sub-intake ports”, as Yamaha calls them) that lead up into the cylinder head’s main intake passageway. YICS made it’s first appearance on various 1981 models, and was used until 1986.
What kind of engine does a Yamaha 750 have?
The 750 version of the Seca was understressed and the narrowest engine in the 750 class upon its debut, thanks to the alternator and ignition being placed behind the cylinders, á la Honda’s CBX.
How to identify a Yamaha from its engine numbers?
Yamaha models can be identified by locating and decoding the crankcase engine number. Yamaha uses a standardized numbering system, which is broken into four sections: model code, basic part number, design code and the finish code. Because the crankcase engine number is actually the part number,…
What’s the difference between a yics and non yics bike?
Non-YICS models have the oil pump covers with only the YAMAHA wording (or no wording at all) cast into the cover. YICS -engined bikes also use a valve cover that has the word YICS cast into the top surface, while non-YICS models are blank or are cast “YAMAHA” (or “YAMAHA 5VALVE” on 700-X/750-X models) on the valve cover.
This chamber is sealed with a small hex-headed bolt (“plug”) and sealing washer at each end, and within the chamber has 4 individual tiny holes (or “sub-intake ports”, as Yamaha calls them) that lead up into the cylinder head’s main intake passageway. YICS made it’s first appearance on various 1981 models, and was used until 1986.
The 750 version of the Seca was understressed and the narrowest engine in the 750 class upon its debut, thanks to the alternator and ignition being placed behind the cylinders, á la Honda’s CBX.
Yamaha models can be identified by locating and decoding the crankcase engine number. Yamaha uses a standardized numbering system, which is broken into four sections: model code, basic part number, design code and the finish code. Because the crankcase engine number is actually the part number,…
Non-YICS models have the oil pump covers with only the YAMAHA wording (or no wording at all) cast into the cover. YICS -engined bikes also use a valve cover that has the word YICS cast into the top surface, while non-YICS models are blank or are cast “YAMAHA” (or “YAMAHA 5VALVE” on 700-X/750-X models) on the valve cover.