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I have a '99 GP1200 with the following mods:
Riva head 41cc domes
Riva CDI set at 7800 on mod 1
Riva reed spacer plate
Boyesson power reeds
Riva reed stuffers
True and welded crank with 1100 front bearing
New rebuild .050
Pro-Tec intake grate
Riva ride plate
Riva trim tabs
Pre-mix 32:1
Prok flame arrestors
Choke plates removed
Primer
Tripple fuel pickup
Sponson down
Solas "XO" prop
When I was running the stock prop on this ski and before the rebuild I was running 6900-7000 rpm and a best of 64 mph. After the motor rebuild and Solas "XO" I am only running 6600-6700 rpm and best of 62mph. Will the XO prop drop the rpm's that much? It is very wicked out of the hole and on midrange but seems to have lost a little top. I am running 145 psi of compression after rebuild and had 100 psi before rebuild. I am running 100 jets for low and 135 jets for top and a pop-off of 28. Plugs look beautiful and Idles smoothly. Could it be something else besides the prop? This is the prop everybody recommended!!
Thanks
Yam018
Riva head 41cc domes
Riva CDI set at 7800 on mod 1
Riva reed spacer plate
Boyesson power reeds
Riva reed stuffers
True and welded crank with 1100 front bearing
New rebuild .050
Pro-Tec intake grate
Riva ride plate
Riva trim tabs
Pre-mix 32:1
Prok flame arrestors
Choke plates removed
Primer
Tripple fuel pickup
Sponson down
Solas "XO" prop
When I was running the stock prop on this ski and before the rebuild I was running 6900-7000 rpm and a best of 64 mph. After the motor rebuild and Solas "XO" I am only running 6600-6700 rpm and best of 62mph. Will the XO prop drop the rpm's that much? It is very wicked out of the hole and on midrange but seems to have lost a little top. I am running 145 psi of compression after rebuild and had 100 psi before rebuild. I am running 100 jets for low and 135 jets for top and a pop-off of 28. Plugs look beautiful and Idles smoothly. Could it be something else besides the prop? This is the prop everybody recommended!!
Thanks
Yam018
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