Riva RS1001-1503-9.5-010 Operating instructions

Brand
Riva
Model
RS1001-1503-9.5-010
Type
Operating instructions

Riva RS1001-1503-9.5-010 is a high-performance piston designed for Sea-Doo 4-TEC engines with a 1500cc displacement. It features a dish design, 9.5:1 compression ratio, and is made from lightweight materials for improved performance and durability. The piston is compatible with +1mm valves and has a target weight of 442 grams. It requires specific clearance and ring gap measurements for optimal performance and should be installed by an experienced engine builder. The piston comes with detailed specifications and installation instructions to ensure proper fitment and operation.

Riva RS1001-1503-9.5-010 is a high-performance piston designed for Sea-Doo 4-TEC engines with a 1500cc displacement. It features a dish design, 9.5:1 compression ratio, and is made from lightweight materials for improved performance and durability. The piston is compatible with +1mm valves and has a target weight of 442 grams. It requires specific clearance and ring gap measurements for optimal performance and should be installed by an experienced engine builder. The piston comes with detailed specifications and installation instructions to ensure proper fitment and operation.

Word doc. RS1001-1503-9.5-010 © H1 2/8/13 1
Pro-Series 4-stroke Pistons
PART# - RS1001-1503-9.5-010
The following specifications are provided as a guide only. We strongly recommend that only an experienced engine builder prepare
and install this piston following the steps outlined in the OE Service Manual. Failure to properly prep and install this piston falls solely
on the end user. Due to the nature of performance applications this piston is sold without any express warranty or any implied warranty
of merchantability or fitness for a particular purpose. RIVA Racing shall not, under any circumstances, be liable for any special,
incidental or consequential damages, including, but not limited to damage, or loss of profits or revenue, cost of purchased or
replacement goods, or claims of customers of the purchaser, which may arise and/or result from sale, installation or use of this piston.
Installation of this piston will adversely affect the vehicle manufacturer’s warranty coverage.
PISTON SPECIFICATIONS:
MOTOR TYPE
Sea-Doo 4-TEC
COMP. RATIO
9.5:1
HEAD TYPE
4-valve
COMP. DIST.
1.1607" (29.48mm)
DISPLACEMENT
1500cc
INTAKE *
.120" (3.05mm) 17-degree
PISTON TYPE
Dish
EXHAUST *
.105" (2.67mm) 18-degree
BORE
3.947" (100.19mm)
* Valve pocket depth measuered from deck.
STROKE
2.5" (63.4mm)
* Will accept +1mm valve.
TARGET WEIGHT
442grams
_______________________________________________________________________________
IMPORTANT CLEARANCE INFORMATION:
CYLINDER WALL
Measure at bottom of piston skirt as shown at right.
RING GAPS
Stock
Modified
Boosted
Use chart below to determine ring end gap. Multiply bore siz X ring end gap factor.
EXAMPLE:
4.125" bore x .0080" ring end gap factor = .033" minimum ring end gap.
NOTE: These are general guidelines. Always fit ring to intended cylinder.
.0065"
.0075"
.0080"
.0032" ~ .0037"
RING ORIENTATION INFORMATION:
a
Top ring (silver)
b
2nd ring (dark grey)
NOTE:
c
Oil ring rails (2)
1
Piston trust side axis
2
Piston pin bore axis
NOTE: Do not align ring gap with 1 or 2.
If a mark is present on rings install with that side up towards
top of piston.
NOTE: Oil ring expander tips correctly butted together.
Remember, the water belongs to everyone. Please ride responsibly and respect the environment!
Technical Support
For answers to questions regarding installation or trouble shooting RIVA Performance Products contact:
RIVA Technical Support directly at (954) 247-0705 or by e-mail at [email protected]
.
MEASURING POINTS
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Riva RS1001-1503-9.5-010 Operating instructions

Brand
Riva
Model
RS1001-1503-9.5-010
Type
Operating instructions

Riva RS1001-1503-9.5-010 is a high-performance piston designed for Sea-Doo 4-TEC engines with a 1500cc displacement. It features a dish design, 9.5:1 compression ratio, and is made from lightweight materials for improved performance and durability. The piston is compatible with +1mm valves and has a target weight of 442 grams. It requires specific clearance and ring gap measurements for optimal performance and should be installed by an experienced engine builder. The piston comes with detailed specifications and installation instructions to ensure proper fitment and operation.

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