• Follow us on

  • Facebook  : Lee Stone Products

  • Instagram : Leestoneproducts

  • Instagram : Leestone1

OVER 20 YEARS EXPERIENCE
OUR SERVICES

- Manufacturing

- Service Work

- Upgrades and Diagnostics

- Dyno Tuning

- Welding / Machining Repairs

- Parts / Upgrades

  • Facebook Social Icon
  • Instagram Social Icon

Lee Stone Products

CALL OUR TEAM
EMAIL US
OPENING HOURS
  • TUE-FRI 9:00 - 5:00

  • SAT 9:00 - 5:00

Outside the UK+441144000090

From the UK 01144000090

LSP are your authorised dealers for XScream, ATP, Full Spectrum, Power Factor, Hydro Turf and Jetlift

ATP Twin Intake Manifold

£275 + Vat

ATP Billet Twin Intake Manifold.

  • 2 individual intakes allowing for future cylinder spacing configurations.

  •  O-ring speed plate rotates 180° allows for fitting carbs in either direction including the throttle cable bracket.

  • Manifolds are angled for optimum fuel/air flow = more power.

  • Available anodised- Colour choices below

  • Supplied Manifold, Speed-plate, o-ring and mounting hardware.

ATP 49mm Carbs recommended - Works with Mikuni SBN body types up to 50mm before any modification required
V-Force 3 cage set suggested. Also fits OEM SJ Reed cages and V-force 2 reed cages, assuming cases not over epoxied.

ATP 49mm Carbs

£770.83 + Vat

Since 2004 ATP have been producing easy to tune 48mm annular discharge carburetors that always delivered on power and performance for Freestyle - Freeride

New for 2017 ATP 49mm Annular discharge Carbs . The 2017 design continues to deliver on power & performance, this also allows them to work exceptionally well on Race engines in addition to Freestyle and Freeride applications no matter, these are not a single minded carb set up. Base carb is Mikuni SBN, CNC machined precision bore, then hand built and pre jetted.

  • Pre jetted

  • Flexible shaft coupler included

  • Matching ATP Billet Carb Cover Plates & Throttle Drum Included

  • Easy To tune

  • Bolt on Performance

Full Spectrum 49mm Carbs

£1300 + Vat

Duel 49mm Full Spectrum Carbs, Supplied with linkage and return 'T' piece and jetting.

Power Factor Exhaust System

£1350 + Vat

The ultimate freestyle exhaust system. Designed for flat water freestyle and free ride, the PFP exhaust optimizes the power band of most modified jet ski engines. The exhaust manifold bolts up to any Yamaha 701 exhaust bolt pattern. The PowerFactor dry exhaust, is designed so nothing interferes with the engines top end. This allows for any combination of top ends (Bore, Stroke, and Exhaust Valves, etc). It also allows easy access to engine components. 
 

771cc Engine Short Block

Tired of your current 701 set up and Looking for a low cost, low maintenance upgrade?

Well here is your answer, The 85mm Big Bore 771cc short block.

This engine package utilise OEM components but modified to give you those extra HP's that your looking for!

 

BB771 Short Block Features: 

  • Freestyle Cylinder Porting 

  • Modified Yamaha 62T cases - Includes epoxy and finger port work, reinforcing front seal area with epoxy, installing a second pulse line fitting and fly cutting to accommodate the larger sleeves 

  • Big Bore Sleeves (84mm to 86mm bore) 

  • ADA Girdled Head 

  • Wiseco Forged Pistons 

  • Domes for pump, aviation or race fuel 

  • OEM Yamaha 701 Crankshaft 

  • OEM Yamaha Crank Seals 

 

Piston Options: 
84mm, 84.5mm, 85mm, 85.5mm and 86mm Wiseco Forged Pistons

  • 84mm bore = 753cc 

  • 85mm bore = 771cc 

  • 86mm bore = 790cc

XScream Stock Stroke 900cc Top End Kit

If your looking for the 900cc power without the 900cc price tag then this is the option of you.

Utilising your current Yamaha 701cc Crank and Cases this kit gives you an almost plug and play 900cc engine set up.

**OEM 62T cases will need to be fly cut to accept the larger sleeves

SS900 Top End Kit includes: 

  • SS900 Billet Cylinder with Power Valves 

  • XScream Freestyle Cylinder Porting 

  • Wiseco Forged Piston Kits 

  • Wrist Pin Bearings 

  • XScream SS900 Head 

  • XScream Custom Sleeves Installed (90mm to 91mm bore) 

  • Domes cut for pump, aviation or race fuel 

  • Dome O Rings 

  • Custom Base Gasket 

  • Stainless Steel Bolts for Cylinder and Head 

Stock Stroke Xscream 900cc Short Block

The SS900 Short Block uses an XScream billet power valve 7 port cylinder with the OEM Yamaha 701 crank. This SS900 power valve cylinder has unmatched reliability and linear power delivery for the enthusiast that demands the best. We provide tuning recommendations and support to ensure complete satisfaction with our engine long after delivery.  
The SS900 is also available as top end kit for use with 62T cases. 

Short Block Includes: 

  • X Scream Custom billet 7 port power valve cylinder 

  • XScream Billet Head & Domes 

  • Wiseco Pistons 

  • Modified Yamaha 62T cases - Includes XScream epoxy and finger port work, reinforcing front seal area with epoxy, installing a second pulse line fitting, CNC work to match the top case to larger transfer ports on our billet power valve cylinder and boring the cases to accept the +10mm stroker crank. 

  • 78mm Billet Stroker Crankshaft (+10mm) 

Xscream 900R Short Block

XScream custom billet 7 port power valve cylinder. This +10mm stroker amateur competition short block uses 85mm pistons for 885cc displacement (1 over bore remaining to 85.5mm). 

Short Block Includes: 

  • X Scream Custom billet 7 port power valve cylinder 

  • XScream Billet Head & Domes 

  • Wiseco Pistons 

  • Modified Yamaha 62T cases - Includes XScream epoxy and finger port work, reinforcing front seal area with epoxy, installing a second pulse line fitting, CNC work to match the top case to larger transfer ports on our billet power valve cylinder and boring the cases to accept the +10mm stroker crank. 

  • 78mm Billet Stroker Crankshaft (+10mm) 


- Requires Boyesen RAD Valve intake, XScream XS900 Custom Intake or a Riva reed spacer 

Xscream 1200cc Short Block

The XS1200 engine is breaking all the power barriers for pro riders who demand the best. This engine uses an 84mm billet crankshaft designed, built and balanced specifically for the XS1200 (Stroke 84mm x Bore 94.5mm/95mm). The engine features modified Yamaha 66E cases with a custom stator plate allowing the use of a Yamaha 701 / 62T style MSD Total Loss ignition system. No exhaust adapter is required for 701/760 style exhaust systems. The short block is available with custom bedplates and a billet front cover. 

  • XS1200 Short Block Features:

  • True 1200cc displacement 

  • No exhaust adapter required for 701/760 style exhaust system 

  • XScream Freestyle Cylinder Porting 

  • CNC Port matched 66E cases 

  • 62T style stator adapter for MSD Total Loss Ignition 

  • XS Custom Flat Top 94.5mm / 95mm Wiseco Pistons 

  • 84mm Billet Crankshaft designed, built and balanced specifically for the XS1200 

  • XScream Custom Sleeves (94.5 to 95mm) 

  • Custom Billet Bedplates Available 

  • Custom Billet Front Cover Available  
     

    XS1200 Piston Options: 94.5 and 95mm Wiseco Flat Top Pistons

    • 94.5mm bore = 1178cc 

    • 95mm bore = 1190cc 

Xscream 1400cc Short Block

The XS1400 Long Block uses an XScream billet power valve cylinder with a custom 88mm crank and 100mm Wiseco pistons. This engine delivers tremendous power.  
 

XS1400 Long Block Features: 

  • XScream Freestyle Cylinder Porting 

  • Modified Yamaha 66E cases - Includes XScream epoxy and finger port work, CNC matching the case to larger transfer ports on our billet power valve cylinder, and reinforcing and boring the cases to accept an 88mm crankshaft. 

  • XScream Custom Sleeves (100mm bore) 

  • Wiseco Forged Pistons 

  • Custom cut domes 

  • 88mm (+20mm) stroker crankshaft with OEM Yamaha bearings 

  • OEM Yamaha Crank Seals 

  • XS Custom Exhaust Manifold 

  • XS Intake System with Reeds 

  • Bedplates 

  • Front cover and Stator plate

Please reload