250 RACE ENGINE MODS - Back to Engine Mods

HPD-763-389-3336

Race Mod Kit

Beat a 400 Sport with your 250 Trail Blazer!
Fits 99-06 250 Trail Blazer.
The total kit price completed will save you money too!
Race Mod Porting
Bore Cylinder 1 Size
Wiseco Forged Piston
Race Mod Head
Pipe with Muffler
Gasket Kit
(Head & Base)
Clutch Kit (CK2RM1)

$300.00
65.00

123.58

70.00
270.00
48.63

170.00
If purchased separately $1047.21

TOTAL KIT PRICE $920.00
PART # RMK2
• LIST $935.00

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NOTE: Requires 100 plus octane fuel.
** All engine parts must be clean and stripped of all parts or a $15.00 charge will be added to do the work.**

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Race Porting

Up the fun factor on your 250 Trail Blazer with this race porting and a HPD pipe. Takes the Trail Blazer's 22 horsepower stock engine to over 35 horsepower.

Requirements: A HPD pipe, head machining, and clutch kit. Use with 100 Octane fuel.

PART # RMC2
• LIST $300.00

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Bore Cylinder

Send us your cylinder, and we will bore, hone and chamfer the ports.


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Remove up to .04" material
PART # BORE
• LIST $65.00

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Remove .04" to .08" material
PART # BORE+
• LIST $70.00

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Race Head Mod

Head machining to match the above porting for the Trail Blazer will raise compression for better all around power. (100 Octane fuel required.)

PART # RMH2
• LIST $70.00

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WISECO
Forged Pistons

Due to past experience with broken pistons on modified ATVs, we require WISECO pistons be used on all modified engines, and recommend them for all others.
Includes: Piston, rings, pin, and clips.

REQUIRES: Cylinder honing or boring.

250 ATV Piston
Std./Oversize: Std
PART # 536PS
• LIST $133.10
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250 ATV Piston
Std./Oversize: .040
PART # 536P4
• LIST $133.10
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250 ATV Piston
Std./Oversize: .020
PART # 536P2
• LIST $133.10
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250 ATV Piston
Std./Oversize: .060
PART # 536P6
• LIST $146.39
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250 ATV Piston
Std./Oversize: .080
PART # 536P8
• LIST $146.39
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Aggressive Clutch Kit

Kit includes: Helix, weights, 2 springs, installation guide, and shims (if needed).

Aggressive clutch kits are faster accelerating, plus more mid range response. Back shift is improved at all speeds. These kits also improve belt life. All have been tested for accuracy on dynoed engines with on board computers. This is the best performing trail set up.

Custom clutch kits can
be made for most Polaris ATV's and modifications. All kits are for 0 to 2000 ft. elevation. You must state if your use will be for higher altitudes.

250 Trail Blazer

With race mod porting, head, pipe and carb. This makes for one very fast Trail Blazer.
For Modified Engines Only!

PART # CK2RM1
• LIST $190.00

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HPD’s Adjustable Clutch Weight Kits

We have found, what we believe are the best Adjustable Weights available. We are stocking 4 versions of these weight kits. Designed to get the power to the ground. They have a very aggressive curve for a faster up shift, and are adjustable in three areas, Low, Mid and Top End. The Low End is adjustable without removing the weight from the clutch.

50-66 Grams

PART #AWHH 50-66
• LIST $230.00

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55-71 Grams

PART #AWHH 55-71
• LIST $230.00

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60-76 Grams

PART #AWHH 60-76
• LIST $230.00

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65-81 Grams

PART #AWHH 65-81
• LIST $230.00

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Single Throttle Cable for Polaris -
Metal Throttle
Part # STC

Single Throttle Cable for Polaris -
Plastic Throttle
Part # STCP

Single Throttle Cable
(for metal throttle)
PART # STC
• LIST $35.00

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Single Throttle Cable
(for plastic throttle)
PART # STCP
• LIST $35.00

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Kevlar Performance Belt
High strength Kevlar construction and soft compound for less belt slip. Excellent replacement belt for your 250 Trail Blazer.

PART #HPD113
• LIST $60.00

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Kevlar Cord ATV Belt

Kevlar construction for strength and a soft compound for less belt slip. Not as strong as HPD113 (above). Original Sportsman EBS belt. Fits all standard clutching and early EBS Sportsmans.

PART #HPD091
• LIST $60.00

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250 Base Gasket

PART # 3084016
• LIST $17.96

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250 Head Gasket

PART # 3084015
• LIST $32.13

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Adjustable
Steering Damper



Hydraulic steering damper for Polaris ATV's helps save your arms and thumbs on rough trails or tracks. The damper unit has a 7-position clicker adjustment. Fits all concentric drive models. Available for 7/8" and 1" steering posts.

For 7/8" steering post

Part # ASD
•LIST $139.00

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For 1" steering post

Part # ASD01
•LIST $139.00

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Starter Eliminator Kits

Kits includes: Cover plate, gasket, and 3 nylock nuts.

 

250 Polaris Eliminator Kit
PART # SEK2
• LIST $27.00

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Oil Injection
Eliminator Kits


Eliminated Oil Injection.

Single throttle required.

250 Oil Injection Eliminator

PART # OIEK2
• LIST $27.00

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Steering Post Bearing

If your steering is loose, this is the product for you. This lower steering post bearing is made of 6061T6 aluminum, has a 660 high impact cast bronze bearing with grease grooves, and is held in place with 1/4 inch allen bolts with nylock nuts. Fits all models with 7/8" steering post.

PART # SPB
• LIST $35.00

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Heavy Duty
Engine Mounts
80 Durometer
For Performance or Race Engines

Heavy Duty mounts should be used on performance machines to keep the engine in correct alignment, making the clutches more efficient and a faster ATV.

Mounts are sold each (not in sets)

80 Durometer
PART # 32-80-HD
• LIST $26.00 each
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NOTE: Mounts are sold each (not in sets). 250s and 400s require 3 mounts. (Not for use on 500s.)

 

Twin Air Dual Stage Air Filters

Constructed from two layers of high flow, open pore foam, bonded together to provide maximum filteration and superior air flow. Gives you increased power, ease of maintenance, and cost savings.

Round Element for 2001-06 Trail Blazer

PART # TA150900
• LIST $29.00

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HPD-763-389-3336