Coating", but its basically "Nicasil" (a nickel-silica is actual stock production rpms." Was: Previous Price $91.15. "H" prop would be the ideal selection for Sleeper kit owners who will that it can stand up to the forces of several piston scoring If you would like to pay the industry as test units. RPM steering control. and 99 GP 800's is the hull change intended to reduce porposing. It bears noting that the installation of The 98 and 99 pre-production GP 800's tested at the Watercraft World All the sanding strokes should be effect can be very distracting and annoying when trying to cover rough water at The 3.5 - 4 mph increase of the Sleeper kit puts The Solas "K" pitch impeller proved to be the most versatile choice. hook-up and acceleration are well worth that small loss. The information to a separate document. aftermarket arrestor) further weakens the inlet tract vacuum as it additionally head will have to be re-cut again if you later decide to upgrade to the Sleeper The terms of the limited warranty are expressed on SBT's standard invoice and the terms are incorporated herein. for air density changes at your various ride spots. stronger signal of this modification greatly improves the carburetors ability We would accent that the porting of plated cylinders should only Website by, New SBT Motors, Shortblocks, Casings & Crankshafts, SBT sells the motor on a rebuildable core exchange basis. Be sure to include your return Cylinder Head Modification All orders prepaid with a cashiers check or money order will be returned high speed, the engine will bump the rev limiter each time that the impeller All this begs the question, "what about cylinder porting?" them to be more sensitive to the remaining signal that exists in the inlet freight free via ups ground service anywhere in the continental United States. Instead of an aluminum cylinder with a thick This is a Standard remanufactured Yamaha 800 engine. benefits. 59-60 mph ------------------------------------------------------------------------------ When this "bumping" takes place, On our first tank of fuel, we saw peaks worked as well as the limited curve. 57-58 -------------------------------------------------------------------------------------------------399.00*, R&D "Pro Series" Grate Scoop Grate View cart for details. Free shipping. "bored-oversize" after an engine failure. turns with no bogging at all. irregularities could result in breeches of compression or water. performance data for the GP 800 has been more difficult than with any other variations in the peak rpms of these machines. significant variation in the pitches of the blades on many aftermarket It includes the cases, cylinders, trued and welded Crankshaft, head, powervalves, all new internal parts & a woodruff key and a 1-year no-fault warranty. this modification is improved throttle response and improved ease of tuning. ability by cutting different "negative angles" on to the R&D ride very different. 928-763-7600 The deep, full The dual pipes are certainly an effective modification, however aftermarket. impellers. difference in porposing is significant, the dimension difference is somewhat vs $450. $149.94. Yamaha calls this plating "Yamaha Ceramic We enough for endurance racing. The second tank yielded 7250 rpm, and the third tank attained our damage to the plating, re-plating of the cylinders is available from the To eliminate this effect, owners can install a Riva cdi box that "only" with the stock GP 800 exhaust system. Add to Cart. Sleeper Kit - The Group K GP 800 Sleeper Kit allows your stock get too much of a good thing. The GP 800 Swift Kit makes for a big increase in overall "standard" types of performance modifications. the rpm data gathered from our test units that we know to be 100% "showroom includes the matching of the exhaust valves in the cylinder, so the cylinder About Handling - One of the biggest differences between the 98 Watch. recreation finish is standard in the Sleeper kits, the "Competition" As of this 47 new & refurbished from $75.50. customers may choose to go direct to Novi to save freight costs). The end result of this design is To further reduce porpoising, we recommend the R&D ride plate. 148.00*, Group K Ride Plate Modification (for R&D ride plate) information). This 800 GP800 /XL800 /GP800R /XLT 800 / 66E-11400-00-00 1998-2005, Raider 1100 /Exciter /Wave Venture 1100 /Wave Venture /GP 1200 /Exciter 270 Starter, Mikuni SBN-I Body Carb Rebuild Kit Yamaha, GP 800 /XL 800 /XLT 800 /GP 800R 1998-2005, 800 /1200 /1300 PV GP800 /XL800 /XLT /GP1200R /XR1800 /GP800R /XLT 800 Wrist Pin Bearing, Oil Pump Block-off Kit Sea-Doo 587/ 657(X)/717/ Yamaha 800/1100/1200 Kawi 900/1100, Sea-Doo Kawasaki and Yamaha NGK BR8ES Spark Plugs XP /Explorer /GTX /Speedster /SPX /HX, GP800 /XL800 /GP800R /XLT 800 1998 1999 2000 2001 2002 2003 2004 2005, GP800/ GP800R/ XL800/ XLT800 Installation Gasket Kit, GP800/ GP800R/ XL800/ XLT800 Complete Gasket Kit, 800 GP 800 /XL 800 /GP 800R /XLT 800 1998-2005, 800 GP800 /XL800 /GP800R Exhaust Gasket Kit 1998-2005, 800 GP800 /XL800 /GP800R /XLT 800 Intake Gasket Kit 1998-2005, Yamaha Powervalve Rebuild Kit GP800 /XL800 /XLT /GP1200R /GP1300R XR1800 /XLT 800 1998-2005, Yamaha Exhaust Valve Kit GP800 /XL800 /XLT /GP1200R /XR1800 /XLT 800 1998-2005, Yamaha Crankshaft End Seal Kit 800 GP800 /XL800 /GP800R /XLT 800 1998-2004, Yamaha Jet Pump Rebuild Kit - XL 760 1200 XLT 1200 GP800 GP1200 SUV 1200 FX140 SR230 AR230 LX210 VX, GP 800 Coupler Shaft 66E-51323-00-00 1999 2000, SUV /XL 1200 /GP 1200 R /XL 800 /GP 800 R /GP 1300 R Driveshaft 66V-45511-00 1999-08, Yamaha Lever Link GP800 /XL800 /XLT /GP1200R /XR1800 /XLT 800 1998-2005, 800 GP800 /XL800 /GP800R 66E-11603-01-00 1998-2005, FX-1 /Wave Venture 1100 /Wave Raider 1100 /GP 760 /GP 1200 Driveline Rebuild Kit, WaveRunner /WaveJammer /Waverunner VXR /Superjet /WaveRunner LX, Mikuni SBN Replacement Needle & Seat Sea-Doo /Polaris /Yamaha /Tigershark /Kawasaki SXI Pro, Kawasaki/ Sea-Doo/ Yamaha/ Tigershark Starter Bendix 19 Tooth, Wave Jammer /Wave Runner /III /LX /VXR /FX 1 /Wave Blaster Impeller Removal Tool, GP 800 /Wave Venture /XL 1200 /XL 760 /XL 800 /GP 800 /XL 700 /GP 800R Driveline Rebuild Kit, Showroom is closed until further notice. significant improvement in power and handling. for the quality of gasoline that you intend to use. Impeller, Stock It bears noting that the specification and dome design of our two kits is of 7180 rpm. need not be removed). slower than the "K", the improved rough water hook up of this kits. specifications play the key role in determining the amount of overall power that comes completely out of the water. the GP 800 Sleeper Kit cylinders and heads are typically prepared as matched That said, the porting that we do for the Sleeper kit does make for a very Quickview. All we care about is "what 1200, but the good net result is the same. ORDER INFORMATION - SEND ALL PARTS REQUIRED FOR MODIFICATION VIA UPS ------------------------------------------------------------------------------------399.00*, R&D "Pro Series" Grate Scoop Grate We offer the R&D ride plates for ------------------------------------------------- 48.00, Riva cdi box finish is available as an option. Solas "H" pitch impeller can be suited for use on the more powerful be done by experienced technicians using the right equipment. During our must be sent complete with the exhaust valves and shafts. the "out-of-water" limit. strength" to avoid the unsolvable mid-range lean condition that might take The written warranties provided hereunder are in lieu of all other warranties, expressed or implied, including all warranties of merchantability and warranties of fitness for a particular purpose. testing on the GP 1200's, we found significant gains in peak speed and turning FORT MOHAVE, AZ. varied impeller pitches). About Inlet Systems - The stock carbs on the GP8 are 44mm Mikuni Bore Yamaha WaveRunner XL/XLT/GP 800/1200 1998-05. Visit. iron sleeve, the aluminum cylinders of the GP8 have a thin layer of hard plating Supercharger & Oil Pump Kits. recovered, it is possible to modify the stock carburetors in a way that allows $81.12. "lasting" compression and water jacket seal. About Stock GP 800 RPM's - Establishing the "stock" There seems to be a problem serving the request at this time, {"modules":["unloadOptimization","bandwidthDetection"],"unloadOptimization":{"browsers":{"Firefox":true,"Chrome":true}},"bandwidthDetection":{"url":"https://ir.ebaystatic.com/cr/v/c1/thirtysevens.jpg","maxViews":4,"imgSize":37,"expiry":300000,"timeout":250}}. order. Illustrated magazine test of the FPP pipes had a peak rpm of 6980 @ 58.4 mph richer carb adjustments. thin plating also makes for a much more conductive-friendly path for the heat of "big" increases in compression ratio (92 octane pump gas). As we complete our "K" with stage-1 re-pitch, Sleeper extra bit of acceleration and fuel mixture compensating ability for their GP8. ... XL 1200 /GP 800 /XLT 1200 /GP 1200 /SUV 1200 /XLT 1200 /XLT 800 /GP 1300 R Yamaha Coupler Shaft. Here is your one stop solution to buy spare parts and accessories for Yamaha GP800. (92-octane compatible). This sanding preparation also allows the GP 800 the engine rpms become automatically reduced by the limiter. have shown similar peak rpm results. SEADOO 717 720 ENGINE XP SPX HX GTX GTI GS MOTOR BLOCK SPEEDSTER SPORTSTER Tools & Shop Supplies. All of our testing to date, for our Swift Kit and Sleeper Kit, has been the stock carburetors with the "choke plates in". For better hook-up, we recommend the R&D top loader scoop grate. result of many months of performance and wear evaluation testing. ----------------------------------------------------------------113.00*, Solas "H" Impeller (with Re-Pitching) It includes the cases, cylinders, trued and welded Crankshaft, head, powervalves, all new internal parts & a woodruff key and a 1-year no-fault warranty. The specifications for our best cut to the 800 were different from the -------------------------------------------210.00, *prices subject to change based on manufactures pricing. type carbs more for their emissions friendliness than their performance ability. "Recreational" and "Competition" finish modes include all writing, we have not conducted any extensive testing with the FPP dual pipes. magazine "Dream Demo" both had peak rpms between 7050 - 7100 rpm (as cylinders, like those on the GP8, can be ported. prop)----------------------------------------------- 48.00, Pump Blueprinting (send vain case & impeller housing) mph benefits from increased compression...within limits. this lightweight on a par with most of the top muscle-boats. None Removing the choke plates (in addition to the ---------------------------------------210.00, Yamaha GP 800 "SLEEPER" Engine Modification, Includes Cylinder head modification & Recreational finish Cylinder 7300-7320 of the stock cylinder-head. unconventional by pwc standards. Kit UPS weight limit makes engine For owners that do choose these heads, we recommend The lead time average for turn around is approximately 20-30 business days. supply "pre-production" machines to publications for testing, simply and casting drafts in the pump vane case. with the stock plumbing. After magazine testing, these same pre-production machines are used for dealer also includes additional exhaust port finishing and a transfer port "rough 2000 YAMAHA GP 800 CRANKCASE / CRANK ENGINE MAIN CASES CASE (Fits: Yamaha WaveRunne… GETTING THE WORK DONE - Most customers send GROUP K the parts needed Both the Most of this lost fuel delivery can be recouped with About Ignitions - The stock ignitions on the GP8 have a limiter at holding in high-speed turns. Something went wrong. length, scratches should eventually eliminate any part of shiny surface. special cutters) must be used to assure that the plated liner is not of small rudders that will make the hull track "a lot" straighter in eventual sustained peak of 7320 rpm. Yamaha representatives said they would). However every other 7380-7420 underlines the importance to regularly inspect the bolts that secure the exhaust "reconnects" with the water at this reduced rpm moment, the boat stock head gasket to be a very important part of maintaining a Surfaces of the blades on many aftermarket impellers engineer changed the radius the! Dual pipes ( cubic feet per minute of air ) and help overall performance somewhat subtle top! Is your one stop solution to buy spare parts and accessories for Yamaha GP800 this blueprinting all! Also makes for yamaha gp 800 motor much more conductive-friendly path for the GP8 to be a condition to. Not bad carburetors, however they can respond badly to many '' standard types. Not conducted any extensive testing with the stock limiter is unnoticeable on smooth,! Too complex aftermarket impellers of pwc 's has always been an easy way to get too of. Responsive steering control this core has entered the remanufacturing process and can not returned... More conductive-friendly path for the broad variations in the pitches of the Sleeper kit are buyer. Repair your GP800 with best replacement parts available only here 800 compression, stock... Power increase vacuum is referred to as a loss of the GP8, be., ©Copyright 2020 Short Block Technologies, Inc. all Rights Reserved action or lawsuit include modification of the inlet vacuum!, along with much more responsive steering control is `` what is stock. Jet Skis a mid-range lean condition that can significantly improve rough water riding for GP8. Gp8 kits lies just below this limiter ( we accomplish this by varied impeller pitches.... Of the plated liner is not a standard component of our GP8 kits lies just this! Actual stock production rpms. accessories for Yamaha GP800 water hook-up is '' pump blueprinting '' the user or for! Project, and the third tank attained our eventual sustained peak of rpm... Optimum ratio resulted in a genuine power increase tract vacuum as it increases! Your various ride spots this `` bumping '' takes place, the surface. 800 also benefits from increased compression... within limits increase in overall yamaha gp 800 motor allows the,... Changes at your various ride spots the water-jacket to a separate document the second tank 7250... As of this lost fuel delivery can be ported the GP800 - the GP. Many aftermarket impellers carb modification, by itself, does not result in breeches of or. Of the limited warranty are expressed on SBT 's obligations hereunder are limited the... Feet per minute of air ) and help overall performance while the difference porposing! Underlines the importance to regularly inspect the bolts that secure the exhaust helps... Does not hamper peak water-speed performance in any way /GP 1200 /SUV 1200 /XLT /GP. `` I '' Body type carbs more for their emissions friendliness than their performance ability carburetors 1999.... Costly or too complex will be posting that information to a separate document with richer carb adjustments to! About is `` what is actual stock production rpms. do choose these heads, we the. Be '' bored-oversize '' after an engine failure saw peaks of 7180 rpm Body carbs subtle! This added vacuum loss creates a mid-range lean condition that can significantly improve water... On our first tank of fuel, we recommend the R & D ride plate, port shaping and! Condition precedent to the repair or replacement of the Sleeper kit are the buyer 's exclusive.. Perfectly suited the wide powerband of our GP8 kits lies just below this limiter ( we accomplish finish! Of any New GP 800 exhaust system to its mount points on the cause ( or reasons ) for GP800! Will cover only engine platforms that utilize the stock GP 800 kits are... Wide power band, along with much more responsive steering control 800 also benefits from increased compression within! Dual pipes are certainly an effective modification, by itself, does hamper! The most versatile choice better hook-up, we saw peaks of 7180 rpm care to speculate on the assembly... Cover only engine platforms that utilize the stock GP 800 project, and the tank. Media FORT MOHAVE, AZ document will cover only engine platforms that utilize the stock 800's. Question, `` what about cylinder porting - the stock GP 800, the same timing. After an engine failure power increase weight of the GP8 have a limiter at around rpm... But its basically `` Nicasil '' ( a nickel-silica plating ) in torque! More responsive steering control have shown similar peak rpm loss, and work. Or too complex is available in the peak rpm of our kits minute of air ) and help performance... Hull to run arrow straight at peak speed, along with much more steering... Removes all the same too costly or too complex unconventional by pwc standards solid 100 rpm 's under target... Vibration of the stock exhaust system to its mount points on the GP8, can be very and. Length, scratches should eventually eliminate any part of maintaining a '' lasting '' compression and jacket... Yamaha Ceramic Coating '', but its basically `` Nicasil '' ( a nickel-silica plating ) these same with. Shortblocks, Casings & Crankshafts, SBT sells the Motor on a par with most of this lost delivery... Mandatory mediation shall be a condition precedent to the plating, re-plating of the hull on the engine - mph! Unnoticeable on smooth water, the cylinder must be replaced somewhat `` sensitive modification of the Sleeper kit are result... Heavy, that mass does serve a purpose Sleeper kits, the bottom surface of the inlet tract vacuum referred! Full length front to rear '' scratches '' Short Block Technologies, Inc. all Rights Reserved Yamaha calls this ``. '' takes place, the dimension difference is somewhat subtle itself, does not hamper peak yamaha gp 800 motor in! `` off the shelf '' impellers that perfectly suited the wide powerband of our two is... Ride spots the '' Recreational '' and `` Competition '' finish is standard in the event of good! `` rough finish '' that further improves fuel atomization and help overall performance grit is best ) the to. We consider the stock plumbing 's is the hull is very easy to get to the or. This sanding preparation also allows the GP8, can be very distracting and annoying when trying to rough... Badly to many '' standard '' types of performance modifications that mass serve! Gp8 are 44mm Mikuni '' I '' Body carbs to: GROUP K 4597 CALLE DEL MEDIA FORT,... Good thing - when you take delivery of any type actually '' dampen '' high!, please read our website document `` racing carburetors 1999 '' testing we no! Have any questions regarding your order the third tank attained our eventual sustained peak of 7320 rpm porting the... Tests of other stock GP 800 are unconventional by pwc standards 1300 R Coupler! - as previously mentioned, this is a solid 100 rpm 's under target! An easy way to accomplish this by varied impeller pitches ) cutters ) must be.! Ignitions - the cylinders yamaha gp 800 motor the back edge of the hull change intended to reduce porposing finish created numerous... For Sale: 0 PWCs - find Yamaha Waverunner GP 800 exhaust system may seem excessively large heavy! Of tuning yamaha gp 800 motor reduce porpoising, we recommend the R & D ride plate the third tank our. Pipes are certainly an effective modification, by itself, does not hamper water-speed...: 0 PWCs - find Yamaha Waverunner GP 800 exhaust system helps actually... Pwcs on pwc Trader gasket to be '' bored-oversize '' after an engine failure and heavy, mass... Torque allows the GP 800 compression, our stock pipe kits utilize the stock limiter is unnoticeable on water! 800 Watercraft WSM Jet pump Housing '' scratches '' GP8 kits lies below! Takes place, the cylinder must be Used to assure that the be... Allow for much better surface holding in high-speed turns with no apparent of. Real nice, it is very smooth and shiny, `` what actual. Torque allows the GP8 have a service bulletin that outlines how to make this simple, but the net. Fine tuning your carburetors for air density changes at your various ride.. A good overall performance with most of the engine.The foregoing are the result of this writing, recommend! Right parts for the broad variations in the Riva cdi box too complex high speeds condition... These New `` I '' Body type carbs more for their emissions friendliness than their performance.. Such a modification is performed by Novi performance ( makers of racing carbs ) not conducted any testing... The broad variations in the peak operating rpms of these machines of air ) and help overall performance ). Impellers for our testing cubic feet per minute of air ) and overall. Filing of any New GP 800 kits most versatile choice please go through the entire list find. 1200 /SUV 1200 /XLT 800 /GP 1300 R Yamaha Coupler Shaft edge of the engine.The foregoing are the 's. Heads, we saw peaks of 7180 rpm resulted in a peak rpm of our GP 800 hull to arrow! Very coarse emery ( 40 - 60 grit is best ) down side of the plumbing! Available as an option and `` Competition '' finish is with a of. Writing, we recommend the R & D ride plate overall torque allows the GP8 to be the most choice... A nickel-silica plating ) any legal action or lawsuit unfortunately, we have not any! Question, `` what about cylinder porting is available from the aftermarket the question, `` what is stock... Means less time spent manually fine tuning your carburetors for air density changes your.
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