The new MAC 84's currently available now have an improved Piston / Liner. The New MAC 84 Piston/Liner set has an improved exhaust port and the piston has some skirt removed. The new drum valve is ramped to improve flow and reduce intake tract volume. The complete package results in more total power added to the full rpm range of the MAC 84.
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Current Records
IMPBA 30cc Hydro SAW - 120.58 mph
NAMBA 30cc Mono 1 mi. Racing record - 83.49 sec.
NAMBA 30cc Mono SAW - 70.31 mph
NAMBA District 19 Champion X Mono and X Hydro
NAMBA National Champion TWIN Hydro
Recommendations
Use Brown 84 pipe or AB 67 pipe.
Use either pipe with the MAC 84 Header (18mm I.D.)
Set pipes as recommended on pipe page.
Head Clearance - .010" to .013"
Nitro - 40% to 60%
Parts & Price List
CLICK HERE to open our price list for the MAC 84 engine, and components.
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