Group K Modifications
STOCK
6120 rpm
48.5 mph
ALL LEVELS FEATURE:
Stock Exhaust Pipe • Stock Ignition • Stock Crank and Lower End • 145 psi Compression
92 octane (unleaded) pump gas compatibility (except big bore)
LEVEL 1
6500 rpm
54.5 mph
GROUP K PRICE
Group K “SLEEPER” Modification Kit
- cylinder porting (recreational finish)
- cylinder head cut and dome re-shape
- carb boring and jetting
- primer kit
- cooling upgrade
$750.00
With this modification, the engine looks 100% cosmetically stock. The boat will start and idle as well as a stocker and have the same sound level of a stocker. Besides the 6 mph increase in peak speed, overall acceleration is greatly increased.
LEVEL 2
6600 rpm
57.1 mph
GROUP K PRICE
Polaris SLX Ride Plate (Pol p.n.-2871479)
$99.00
Polaris SLX Airbox Update Kit (Pol p.n. 2871552)
$65.00
DG “standard” Scoopgrate
$49.00
DG “Tri Oval” Waterbox
$125.00
In our testing with the Sleeper modified 750, these bolt on parts gave the “most bang for the buck”. The flame arrestor and waterbox each make a noticeable increase in peak rpm and acceleration. The ride plate and scoop grate both offered increased peak water speeds. (note: The DG waterbox does slightly increase the sound level) (Ride plate and flame arrestor are available from authorized Polaris dealers)
LEVEL 3
6440 rpm
57.3 mph
GROUP K PRICE
Polaris HP-1 Prop (Pol p.n. 2871424)
$199.00
The increased torque of the level 2 engine is able to pull this slightly steeper pitched prop. The result is slightly higher speeds along with much lower engine rpms. Despite the lower rpm range, the strong acceleration is not compromised.
LEVEL 4
6440 rpm
59.2 mph
GROUP K PRICE
Polaris SLX “Extended Pump” Kit (Polp.n. 2871443)
$399.00
This is the updated pump assembly used on all the 1996 780cc models. It yields a substantial increase in peak speed without changing the rpm of the engine. This update kit is available directly from authorized Polaris dealers.
LEVEL 5
6520 rpm
61.2 mph
GROUP K PRICE
100+ Octane 779cc BIG BORE Option
- includes pistons, rings, gaskets, & big boring.
$590.00
R&D Flame Arrestor
$190.00
While the increase in speed is not a lot, the increase in acceleration is substantial. This would be the best arrangement for local level closed course and off shore racers. (still only 145 psi compression) This arrangement can be run on 100+ av gas, or a 50/50 mix of 92 oct pump/110 octane race.
LEVEL 6
GROUP K PRICE
“Competition Finishing” Cylinder Port Option
$200.00
Extrude Hone Exhaust Pipe
$150.00
Both of these options are detail upgrades for the owner who wants to get the most out of every component. They both yield a slight increase in overall authority of acceleration.
ORDER INFORMATION: SEND ALL PARTS REQUIRED FOR MODIFICATION VIA UPS TO:
GROUP K • 4597 CALLE DEL MEDIA • FORT MOHAVE, AZ. 86426 • (928) 763-7600
GETTING THE WORK DONE – Most customers send GROUP K the parts needed for modification via UPS, and then do the engine assembly work themselves. We also do complete engine and pump assemblies for customers who want a finished unit ready for installation. The 150-lb. UPS weight limit makes engine shipping practical and affordable. NOTE: Group K will bill an additional $25.00 handling charge for complete engine assemblies. All orders prepaid with a cashiers check or money order will be returned freight free via ups ground service anywhere in the continental United States. All other orders will be billed to a visa/master card or sent freight collect cod cash. If you would like to pay additional for 3 day, 2 day, or 1 day return shipment, please specify your preference in a cover letter with your parts. Be sure to include your return address and day phone information in case we have any questions regarding your order. PACK YOUR PARTS CAREFULLY !!
