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10-05-2018, 11:32 AM #1
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- Aug 2018
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1997 GP 1200 Modification questions
Hi
Newbie here so lots of questions. I'm trying to understand whether the "R" at the end of gp1200R means power valve. I just bought a 1997 gp 1200 with a blown engine. My jet skis guy is putting in a new engine. I am assuming the blown engine is a non-power valve engine.
First question: When replacing a non-powervalve engine is it a must to replace with another non-powervalve or are they interchangeable. From what I am reading I am guessing they are not compatible.
I also want to have my mechanics do some modifications that will get the best bang for the buck as far as top speed goes. Everything I am reading is for modifications for the GP1200R. what are the best low cost modifications for a 1997 gp 1200 non powervalve to get the most speed out of it. What is a reasonable speed to expect for the stock vs. a modified. Thanks in advance for helping me understand all this!!
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10-06-2018, 01:59 PM #2
A couple of reports of mid to high 60's. PM 97GPSLEEPER for advice. He is the expert on those.
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10-06-2018, 06:31 PM #3
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- Jun 2012
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The GP1200R and the GP1200 are two diferent hulls and two different skis.
However, when the GP1200R became the GP1300R and EFI was added, there were a couple of years when the motor (66v) had no power valves.
The GP1200 came with a 65u non PV motor. This motor doesn't have power valves, or a cat converter, or the huge exhaust, and it made 135hp. Very reliable motor, the hull is decent.
The GP1200R came with a 66v power valve motor, and carbs. cat converter, big expansion chamberexhaust. It made 155hp. Not a very reliable motor. The GP1200R and GP1300R hulls are amazing though.Last edited by stephenspann27; 10-06-2018 at 07:09 PM.
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