GT750 Port timing heights

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jaycee69
Around the block
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GT750 Port timing heights

Post by jaycee69 »

Hi all! i was wondering, was 1977 a stand alone year for port timing height? or were 75, 76 and 77 all the same. im asking because i have a 1977 cylinder and all i can find to re sleeve it is a sleeve for a 1976. i know the port timing changed in 1975 i was wondering if it changed again or 75 was the only change?
73 GT550 K
77 GT750 B
88 Yamaha YSR50 (Street Legal)
91 Yamaha YSR80 (Street Legal)
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Alan H
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Suzuki 2-Strokes: 4 x GT550s - J, M, A, B.
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Re: GT750 Port timing heights

Post by Alan H »

J, K were same, L, M were same and A, B were same AFAIK.
Think of how stupid the average person is, then realise that half of them are more stupid than that.
old racer
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Suzuki 2-Strokes: RG250 GT750L GT750 DRAG seelyt500 tr500MK3
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Re: GT750 Port timing heights

Post by old racer »

Not quite right,
The J.K.L.were the same.Porting was changed in 75 and continued with the same through 76.77.
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tz375
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Re: GT750 Port timing heights

Post by tz375 »

Correct Old Racer.

JAycee, if you don't mind sharing, who has liners in stock or can supply them? LA Sleeve used to list them IIRC.
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