NOTE:   Avenger 42mm stroke Cranks are offered in 2 versions.   

RACING 5 web holes

and

                   Street 4 web holes.                  

This ad is for the RACING version Avenger 42 crank with 5 balance holes per flywheel suitable for higher than stock rpm and normally with a windowed piston.   

Not for the Menace 85 engines, Buy Menace 42 stroke cranks from Smolik. 

We only have 20 of these 5-hole racing cranks for sale due to the limited practical use for them.     

Not recommended for Stock Street daily use. 

The Beveled gear attach has M8-1CCW threads for optional OCDT use.

 FYI:  Due to Trumps Tariff it now cost 58 percent extra per dollar declared goods valuation to get China goods imported into the USA.   

These cranks have a 2mm longer stroke crank for your SkyHawk Avenger, Olyin Avenger 85 or YD 85 engine. It is accomplished by moving the crank conn rod pin outboard by 1mm. 

Makes 89cc engine displacement out of a stock Avenger 85cc engine.   

Comes with a extra cylinder bottom gaskets to move the cylinder upward by 1mm.  

With just this crank change it turns 85cc into 89cc.  How much more power difference will it make? Only God Knows!   We have no dyno and YuanDong didn't tell us!   

If you prefer to NOT have the OCDT Drill Starting accoutrement just let us know with note to seller at check out and we gladly supply according with a slotted beveled gear attach screw suitable for  Olyin 85Avenger or CDH YD85 engines. 

If in addition you order an OCDT counter clockwise, CCW, drive tool with your crank order, we will include the necessary 8-1CCW grade 10.9 hardened hex cap bolt made for OCDT right side CCW cranking. 

Please do not order the Racing version crank unless you plan to race at SoCal or some other race track where engine rpms need to be higher than Street 10,000 max rpms.  Racing engines so modified can reach as much as 14,000 rpms so we are told by internet self appointed authoritarians.   Making a motorized bike produce this kind of circle jockey performance for street use is not a wise thing to do.  The squeeze is not worth the juice!

Note: We believe Racing cranks tend to vibrate too much at the lower RPMs, so hence the reason of our 2 versions. 

If you're wondering if this crank will fit Olyin 85 Avengers and CDH YD85 engines, the answer is, "Yes sir, it will", but NOT designed for Menace 85 or Phantom 85 engines as these use a different piston. 

DISCLAIMER:  As with any China made engine, they are tolerance variables to contend with that require fit & finish modifications to obtain a 1mm desired piston "Quish clearance".   Experienced builders know this and can adjust build and balance accordingly.    If you don't know what you're doing do not attempt to change out a crank on your kitchen table.   Best send your engine to a reliable engine builder to have your 42-stroke crank installed.   

For example:  Should you be sending your engine to Pro engine builder and want us to send a 42mm crank of your choice to him for installation just let us know with "Note to Seller" at check out or call us at 580 775 4496 to discuss.