JetManiac's Engine Rebuild Supershop
Everything you need to build, rebuild, or make changes to your watercraft motor from the crank up!
We stock rebuild parts from OEM and most a/m suppliers like ProX, Wiseco, DASA, SBT, WSM, PHP, and Xscream for stock motors and custom freestyle motors. We specialize in Yamaha based freestyle motors and rebuild parts, but also can help with your Kawasaki, Sea Doo, and other brands rebuilds.
Pro X cast pistons
Pro X pistons are precision machined on the latest, state of the art CNC equipment. Pro X uses same low-expansion, low-friction piston alloy is used as is used by all major Japanese engine manufacturers. Pro X Piston Kits are Japanese made and a direct replacement piston fit and quality.
Pro-X Piston Kits are complete with Riken Japanese piston rings, wrist pin, and circlips. Ready to install!
(Wrist pin bearings are not included with any watercraft brand of pistons.)
Yamaha 701 Sizes:
81mm (Stock bore Yamaha 701 and 1100)
81.25mm
81.5 (710cc)
82 (718cc)
82.5 (726cc)
83mm (735cc)
Yamaha 760 Sizes:
84mm (Stock bore Yamaha 760 and 1200nonPV)
84.25mm
84.5mm (763cc)
85mm (771)
85.5mm (781)
ProX Yamaha piston kits $149. sale 104.90/kit
(piston, piston rings, wrist pin, and circlips)
(also available for Kawasaki, Polaris, SeaDoo, and Tigershark)
Wossner forged pistons
81mm - 86mm sizes in stock
Wossner piston kits $109.90/kit
(piston, piston rings, wrist pin, and circlips)
Wiseco pistons
Precision Forged pistons, state of the art CNC finishing, ArmorGlide® skirt coating, complex dome profiles, and optimized shirt shapes are only a few features that make Wiseco forged pistons the best available.
-Contact us for current pricing for your ski.
DASA pistons
89, 89.5, 94, 94.6, 95mm
WSM pistons
Rebuilt Crankshafts
Yamaha rebuilt OEM crankshaft for 650/701/760 $309.80
(with a core returned)
OEM Yamaha Crankshaft has been rebuilt by SBT with all NEW crank bearings inner seals and NEW connecting rods, then trued and welded to better than OEM specifications.
-Comes with a 1 year no fault warranty (on a crank, wow!)
-We have now sold over 1000 of these cranks with great reliability even in high performance, large bore motors.
*No core option $69. on Yamaha rebuilt cranks, JetManiac has you covered which means a faster and less hassle build.
Rebuilt Cranks also available for most other brands.
Yamaha 1100/1200 nonPV rebuilt cranks 399.
Kawi 650 249.
Kawi 750/800 299.
Crank bearings and Rods
Replacement front, rear, and middle crank bearings
ProX rod kits (replacement rod, upper/lower rod bearings)
Gaskets
Individual gaskets, crank seals and custom JM gasket kits
JetManiac sells high quality US made gaskets using materials that meet or exceed factory specs.
We have individual gaskets or complete gasket kits for your build or rebuild.
Exhaust manifold and headpipe gaskets
Cylinder Base gaskets
Yamaha 650/701/760 cylinder base gasket 7.95
Stock thickness 0.020”
Thicker Yamaha 650/701/760 cylinder base gasket (3 layer- fiber/metal/fiber) 18.90
(available in 0.030, 0.040, 0.050, and 0.060”)
DASA cylinder base gasket
TPE cylinder base gasket
Intake and carb base gaskets
61x intake to reed plate/upper intake gasket 5.50
61x reed plate to cases/lower outline intake gasket 5.50
61x reed cage to reed plate gasket 2.39
Flywheel cover gaskets
Flywheel cover gasket 12.49
62t/61x SuperJet/Blaster motor custom gasket kit -dual 38 carbs, bpipe exhaust, Oring head $49.
61x/61x Yamaha 701 gasket kit for motor with oring head and Factory bpipe exhaust $49.
Custom gasket kits:
Tell us your setup and we make a custom gasket kit for you.
Which cases, cylinder, head, exhaust, intake, and carb(s) do you have? Get the correct gaskets for your setup.
Crank seals Case sealer
Yamaha OEM crank seal set $58.90 Sale 38.90
(Fits Yamaha 650, 701, 760, 1100, 1200nonpv)
XS1200 Yamaha OEM crank seal set 74.97 Sale 51.90
Threebond 1211 HiTemp silicone sealer 23.95
Threebond 1184 (like Yamabond/Hondabond) 19.95
Yamaha OEM brass case pulse nipple 5.95
Blowsion 62t engine blockoff plates with hardware 49.95
Everything you need to build, rebuild, or make changes to your watercraft motor from the crank up!
We stock rebuild parts from OEM and most a/m suppliers like ProX, Wiseco, DASA, SBT, WSM, PHP, and Xscream for stock motors and custom freestyle motors. We specialize in Yamaha based freestyle motors and rebuild parts, but also can help with your Kawasaki, Sea Doo, and other brands rebuilds.
Pro X cast pistons
Pro X pistons are precision machined on the latest, state of the art CNC equipment. Pro X uses same low-expansion, low-friction piston alloy is used as is used by all major Japanese engine manufacturers. Pro X Piston Kits are Japanese made and a direct replacement piston fit and quality.
Pro-X Piston Kits are complete with Riken Japanese piston rings, wrist pin, and circlips. Ready to install!
(Wrist pin bearings are not included with any watercraft brand of pistons.)
Yamaha 701 Sizes:
81mm (Stock bore Yamaha 701 and 1100)
81.25mm
81.5 (710cc)
82 (718cc)
82.5 (726cc)
83mm (735cc)
Yamaha 760 Sizes:
84mm (Stock bore Yamaha 760 and 1200nonPV)
84.25mm
84.5mm (763cc)
85mm (771)
85.5mm (781)
ProX Yamaha piston kits $149. sale 104.90/kit
(piston, piston rings, wrist pin, and circlips)
(also available for Kawasaki, Polaris, SeaDoo, and Tigershark)
Wossner forged pistons
81mm - 86mm sizes in stock
Wossner piston kits $109.90/kit
(piston, piston rings, wrist pin, and circlips)
Wiseco pistons
Precision Forged pistons, state of the art CNC finishing, ArmorGlide® skirt coating, complex dome profiles, and optimized shirt shapes are only a few features that make Wiseco forged pistons the best available.
-Contact us for current pricing for your ski.
DASA pistons
89, 89.5, 94, 94.6, 95mm
WSM pistons
Rebuilt Crankshafts
Yamaha rebuilt OEM crankshaft for 650/701/760 $309.80
(with a core returned)
OEM Yamaha Crankshaft has been rebuilt by SBT with all NEW crank bearings inner seals and NEW connecting rods, then trued and welded to better than OEM specifications.
-Comes with a 1 year no fault warranty (on a crank, wow!)
-We have now sold over 1000 of these cranks with great reliability even in high performance, large bore motors.
*No core option $69. on Yamaha rebuilt cranks, JetManiac has you covered which means a faster and less hassle build.
Rebuilt Cranks also available for most other brands.
Yamaha 1100/1200 nonPV rebuilt cranks 399.
Kawi 650 249.
Kawi 750/800 299.
Crank bearings and Rods
Replacement front, rear, and middle crank bearings
ProX rod kits (replacement rod, upper/lower rod bearings)
Gaskets
Individual gaskets, crank seals and custom JM gasket kits
JetManiac sells high quality US made gaskets using materials that meet or exceed factory specs.
We have individual gaskets or complete gasket kits for your build or rebuild.
Exhaust manifold and headpipe gaskets
Cylinder Base gaskets
Yamaha 650/701/760 cylinder base gasket 7.95
Stock thickness 0.020”
Thicker Yamaha 650/701/760 cylinder base gasket (3 layer- fiber/metal/fiber) 18.90
(available in 0.030, 0.040, 0.050, and 0.060”)
DASA cylinder base gasket
TPE cylinder base gasket
Intake and carb base gaskets
61x intake to reed plate/upper intake gasket 5.50
61x reed plate to cases/lower outline intake gasket 5.50
61x reed cage to reed plate gasket 2.39
Flywheel cover gaskets
Flywheel cover gasket 12.49
62t/61x SuperJet/Blaster motor custom gasket kit -dual 38 carbs, bpipe exhaust, Oring head $49.
61x/61x Yamaha 701 gasket kit for motor with oring head and Factory bpipe exhaust $49.
Custom gasket kits:
Tell us your setup and we make a custom gasket kit for you.
Which cases, cylinder, head, exhaust, intake, and carb(s) do you have? Get the correct gaskets for your setup.
Crank seals Case sealer
Yamaha OEM crank seal set $58.90 Sale 38.90
(Fits Yamaha 650, 701, 760, 1100, 1200nonpv)
XS1200 Yamaha OEM crank seal set 74.97 Sale 51.90
Threebond 1211 HiTemp silicone sealer 23.95
Threebond 1184 (like Yamabond/Hondabond) 19.95
Yamaha OEM brass case pulse nipple 5.95
Blowsion 62t engine blockoff plates with hardware 49.95
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