I just picked up some stock 440 srx pistons. One set has 2 rings and the other is like all the ones I have seen with just 1 ring. What are the 2 ring set pistons from. Also one set has some small holes in the piston on the exhaust side. What are these for. Thanks and have a Merry Xmas.
YAMMIEGOD3:16
Active member
DUAL RING PISTONS WERE USED ON SOME VERY EARLY 1978 SRX,s. I NEVER SEEN THIS ON ANY OTHER YEAR. if it was, i never seen it. 3:16 (yammie tony)
pistons
I thought I had read that on this forum at some time. Probaly a post you had made before. Just wasn't positive. What about the 2 holes on the exhaust port side of the pistons. They are real tiny.
I thought I had read that on this forum at some time. Probaly a post you had made before. Just wasn't positive. What about the 2 holes on the exhaust port side of the pistons. They are real tiny.
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there was 3 pistons for the trail srx
8g9-11631-01-00 single ring
8g9-11631-00-93 double ring design only in engine ser# 008101thru08770 & #s 011071thru011670 why? i dont know someone thought it should be tried for some reason(piston rock perhaps?
this part # superseded to 8j0-11631-00-93 single ring design
as for the holes, never seen stock srx pistons with them before.
8g9-11631-01-00 single ring
8g9-11631-00-93 double ring design only in engine ser# 008101thru08770 & #s 011071thru011670 why? i dont know someone thought it should be tried for some reason(piston rock perhaps?
this part # superseded to 8j0-11631-00-93 single ring design
as for the holes, never seen stock srx pistons with them before.
piston
I had a set of 78 8G9 cylinders also with small cylinder stud holes. They also were for the early year 78's I was told. I was wrong the holes are on the intake side. Which my guess would be for some kind of boost. Thanks for all the info.
I had a set of 78 8G9 cylinders also with small cylinder stud holes. They also were for the early year 78's I was told. I was wrong the holes are on the intake side. Which my guess would be for some kind of boost. Thanks for all the info.
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YAMMIEGOD3:16
Active member
GREAT INFO RAMBLINMAN. THOSE ARE DEFFINEITLY BOAST PORTS. I KNOW AAEN PEFORMANCE WAS BIG ON DOING THIS TO SRX PISTONS, BUT I NEVER SEEN THEM ON OEM. AGAIN SOME OF THE EARLY 78 SRX,s HAD SMALL STUDS. 78 I HAD HAD LARGE. THING I WHISH YAMAHA WOULD OF DONE TO ALL THE SRX,s WAS THE INTAKE BRIDGE DIVIDER. STOP THAT ROCKING THAT CAUSED SKIRTS TO GET WORN OUT. ESPECIALLY ON PORTED ENGINES.3:16 (yammie tony)