89cc Avenger Specially Modified by a famous USA engine builder and live run tested with a 42mm stroker crank and CNC 360 Head. We only build one Avenger 89cc engine at a time so if out of stock just wait a week or so for a new one to appear.
PRICE TOO HIGH??? Understandable: Please know that we now have to pay 60% tariff plus shipping and fob: logistics fees resulting in a total of 80% of declared value to receive goods from China.
For this 89CC Modified Avenger engine we have an additional cost of $132 to have the engine professionally rebuilt with a 42mm stroker crank, cylinder raised 1mm to MATCH PISTON TO TRANSFERE PORT HEIGHT and run tested.. = The new deal = No Free Lunch!
This ad is for a SKYHAWK AVENGER 89-ES Engine only: Made by YuanDong and additionally modified in the USA with a 42mm stroker crank.
$150.95 Engine less head with Red Devil CDI Ignition. / $132.00 42mm stroke crank installed in USA / $79.95 Special HP 360 CNC Head / $5.00 0.2mm thin copper head gasket. / $39.95 OCDT ( overrunning clutch drive tool ) Total = $407.85
Latest and Greatest Premium SkyHawk Avenger 89cc Easy Start Engine;
SKYHAWK Avenger 89 engine includes OCDT Easy Start. Not available anywhere else.
This is our Exclusive Avenger 89 engine with CNC 360 HEAD , Red Devil HP Ignition and our exclusive OCDT Easy Drill Start tool. We inspect what you expect!
INCLUDES;
Avenger 89 52x42 modified engine with our new 360 CNC Head.
Gru-Bee "RED DEVIL" HP IGNITION, has 450 fine wire coil, N45 Neodymium High Flux Density Rotor magnet and CDI with 400V enhanced micro farad capacitor.
OCDT tool for easy Cordless Drill Start is included, but the M6 3/8" hex drive socket is not included as most motorized bike builders already have this item in their toolbox.
Carburetor and muffler are not included due to so many different model choices available on the internet.
We recommend the Mikuni VM18, PZ19 or the VM21 carb. The Bofang carb works ok if not interested in total max. performance.
More HP is obtainable if you install a RMH Belly mount expansion Chamber exhaust. Highly recommended and include a porting job.
Regardless as to what some people may say YuanDong is the exclusive CHINESE manufacture of the Avenger engine.
YD is the same factory that has always made our SkyHawk line of 2 stroke engines for over 21 years.
YD owns the tooling for the Avenger so look for the YD logo on the crankcase to ensure authenticity. Other Chinese factories will soon learn to copy the YD Avenger 85-cylinder design so beware some will be good and some will not be.
What does Premium mean? > Includes the HP CNC Head and Storker 42 Crank we also INCLUDE OUR OCDT for EXCLUSIVE RIGHT SIDE FLIP WINDOW ENTRY FOR CORDLESS DRILL ENGINE STARTING WHICH IS A ONE AND ONLY GRU-BEE EXCLUSIVE FEATURE.
The YD Avenger 89 is a true 89cc displacement HIGH PERFORMANCE 50 MPH Plus capable engine with a 52mm bore and 42mm stroke.
The SkyHawk Avenger 89-ES engine competes directly with the, OLYIN AVENGER 85, Phantom 85 or Menace engine sold by our friendly competitors. The jury is not in as to which one is the fastest and longest lasting. It's a Ford and Chevy type thing!
Gru-Bee has designed a HP CNC 6061 Alum. billet head that gives best squish and 6.7cc hemispherical combustion chamber volume plus 360 degree fin cooling. For additional information See our 360 HP CNC 85A HEAD ad!
The engine retains the stock 25-degree BTDC timing.
Premium SkyHawk Features:
42 stroke crank with 8-hole balance professionally installed right here in the USA
Included is our HIGH FLUX DENSITY N45 NEODYMIUM TZ ROTOR MAGNET IDENTIFIED BY AN OUTBOARD SIDE DIAMOND CROSSHATCH PATTERN.
Included is our ALL RED TZ CDI with a HIGHER MICROFARD CAPACITIOR FOR INCREASED VOLTAGE TO THE SPARK PLUG. NOTE: Other Avenger sellers do not include the CDI when selling engine only. To avoid a mix match, it is Important to have a balanced ignition system all from the same manufacture.
Included is the FINE WIRE TZ MAGNETO COIL THAT SPECS OUT @ 440 TO 450 OHMS depending on ambient temperature.
Included is our Flip Window Electric cranking system that using a 20V Handheld Cordless Drill and our OCDT (Overrunning Clutch Drive Tool ). OCDT is included but the 3/8 Drive M6 socket is not included.
Special Gru-Bee AVENGER 89 features:
42 stroke crank having flywheels balanced with 8 holes. (4 per)
CNC 360 billet head with copper gaskets
PISTON squish set at approx. 1.2mm to allow for the (2) cylinder gaskets to settle to a stable position after running, resulting in the magic 1mm +/- final squish.
