The Sparks Racing 1110cc Big Block Cylinder Kit is a perfect big bore kit for any RZR 1000 XP owner who wants to drastically increase performance without sacrificing reliability… We have designed custom connecting rods for this kit which optimizes rod geometry and are 80 grams lighter than stock to insure both performance and reliability… Most companies are not correcting the rod geometry when they spread the bores on their big bore kits, so they simply offer you an HD stock geometry rod which still must endure extreme side-loads…
(Pump Fuel 11.0:1)
(Race Fuel 12.5:1)
(Turbo 9.0:1)
Big Block Kit Key Features:
Industry leading one-piece cast cylinder with closed deck design
Closed-deck design offers increased cylinder rigidity and gasket sealing capability as compared to an open-deck design
Nikisil plated cylinder which offers light-weight extreme durability and performance
Enlarged water jackets for increased heat dissipation and cooling
Custom designed head gasket to insure gasket integrity
Custom CP pistons manufactured specifically for Sparks Racing
Custom Carrillo rods to optimize rod geometry
Available for pump fuel, race fuel, and turbo applications
PRODUCT DESCRIPTION
This is a complet kit including 8 1/2" STM billet Rage 6 primary, STM Billet RZR Conversion Secondary pre set up with a 35/45ยบ helix, Dayco XTX 5036 belt and proper .120 spider and belt sims installed.
Does not come with primary cam arm weights.
With this system you can not run a stock clutch housing and having a custom cover made is strongly reccomended!
RAGE VI DUAL STAGE PRIMARY PRIMARY CLUTCH
All new unique design that will hold the belt on high horsepower applications. The concept of this design is to provide an improved amount of force to the belt approximately for the first 1/2 to 3/4 of the belts shift and then release the force, once the vehicles momentum is established. This design solves the biggest problem that all racers face from years past– belt slip and over reving during hard acceleration. Problem solved, Hang on! The way it works: All cam arms engage at the same time providing over twice the amount of force to the belt. Once the movable sheave has shifted 1/2 to 3/4 of its now adjustable shift the supplemental cam arms sign off due to centrifugal force that holds them suspended above the movable sheaves rollers. This allows the main cam arms to finish the shift and acquire the proper operating rpm. We can now change and control the total shift in two ways. First is by adding more mass to the supplemental arms and secondly by changing the supplemental roller diameters. Yes its that simple. By decreasing the roller diameter the supplemental arms let go of the shift earlier and by increasing the roller diameter the supplemental arms shift longer before release. During testing we discovered that by increasing the roller diameter by .125" at one time, the initial over revving during hard acceleration would drop 500 rpm with no change in engagement rpm. This option is so simple but yet effective by just a 10 minute roller change. Uses any cam arm available on the market utilizing our retrofit pin design. The first stage cam arms will be provided with the Rage (second stage cam arms sold separately). They will be capable of adding additional weight for adjusting that killer hole shot. Also a set of three different size rollers will be provided.
item number 1001070 primary clutch holding tool is required when removing or installing the screw on spider. Works on all STM primary clutch’s. Sold separately.
