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Head Kits

60 mph Big Bore Kit 47cc 
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Fits all 47cc Cag

The Power House Big Bore Kit is one of the best power improvements you can make to your 47cc Cag pocketbike. With our Bazooka pipe and HP Carb Kit, we have RADAR verified 60mph top speed. Gearing changes were made also. 

    • Custom Cast Big-Bore Head
    • Anodized Hardened Sleeve
    • Cast aluminum alloy Cylinder
    • Made in the USA!
    • Custom Made Pistons
    • Easy bolt on.
    • True 1.75 inch bore
    • True 52cc final engine size
    • Real Gains of 2 1/2 horsepower!!

**Add porting and polishing for even MORE POWER!

Can be used in conjunction with our Widowmaker Nitrous Kits where speeds of over 70mph have been acheived
52BB47
Weight: 10.00 lbs
61 mph Big Bore Kit 49cc 
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Fits all 49cc

  • Super bikes,Cat Eyes, X1's, X2's, X5's, X7's (R1, R6)

The Power House Big Bore Kit is one of the best power improvements you can make to your 49cc pocketbike. With our Bazooka pipe and HP Carb Kit, we have RADAR verified 61mph top speed. Gearing changes were made also. 

    • Custom Cast Big-Bore Head
    • Anodized Hardened Sleeve
    • Cast aluminum alloy Cylinder
    • Made in the USA!
    • Custom Made Pistons
    • Easy bolt on.
    • True 1.75 inch bore
    • True 52cc final engine size
    • Real Gains of 2 1/2 horsepower!!

**Add porting and polishing for even MORE POWER!

Can be used in conjunction with our Widowmaker Nitrous Kits
52BB49
Weight: 10.00 lbs
Big Bore Hi Compression Head Kit 47/49cc 
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Fits 47cc

Complete head kit for the case reed reed engine. Kit includes 44mm big bore machined cylinder, piston kit, billet head shell, dome, gaskets, spark plug, & hardware. 44mm bore x 32mm stroke.

Now you have a very fast, Hi Performance 49cc.



pbhdk4744
Weight: 10.00 lbs
Hi Compression Head Kit 47cc 
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Fits 47cc

Complete head kit for the case reed engine. Kit includes 40mm bore machined cylinder, billet head shell, dome, gaskets, spark plug, & hardware. Uses original piston assembly.

This will increase acceleration, offer better cylinder cooling, and look great!



pbhdk4744
Weight: 10.00 lbs
Removable Dome  
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For 47 Head Kit
Dome size determined by octane of fuel being used.
Uncorrected compression ratio shown is for stock bore and stock stroke engine.
Above reccomendations may vary depending on other modifications done to engine.
What is shown should be considered 'safe' with proper tuning for all applications.
Ultimately, it is the engine builders resposibility for proper assembly and tuning.

11:1 87 octane
12:1 89 octane
13:1 92 octane
14:1  98 octane
15:1 105 octane
16:1 112 octane or alcohol
17:1 116 octane or alcohol
18:1 alcohol
19:1 alcohol
20:1 alcohol
hdd
Weight: 1.00 lbs
Hi Compression Head Kit X1 X2 
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Fits X1 X2

This "X bike" billet head kit has already dominated the race circuit. No other head kit can even come close. Extremely efficient heat sink, 3 compression options, High rpm race piston kit included. Viton O Ring sealed dome. Ported versions run over 11,500 rpm under load! Reed valve versions run over 12,000 rpm!

  • X Bike billet head kit includes:
    • Billet Heat sink
    • billet dome- pump gas, pump/race gas, race gas/alcohol
    • High RPM racing piston kit
    • X Bike cylinder cut to accept head
    • Head studs
    • NGK Spark plug
    • Base gasket


pswsx1hk
Weight: 15.00 lbs

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