BikeBerry FH-MEK80 Installation guide



TheHighestQualityBicyclesandEngineKits.


InstallationandOperatingGuide

ModelNumbers:
FHMEK80,FHBEK80,FHMEK80B,FHBEK80B,FHBEK48,FHMEK48,FHBEK48B,
FHMEK48B

PLEASEREADTHISENTIREGUIDEBEFOREBEGINNING



IMPORTANTSAFETYINFORMATION
Wheninstallingabicycleenginekit,itisalwaysagoodideatodoublecheckallscrews,nuts,and
bolts.Allnutsmustbescrewedontightincaseofvibrationthatmaycausethegasketstoblow.
Remember,tighteningallscrewsmayverywellsaveyourlife.

DISCLAIMER
Thismanualisforentertainmentpurposesonly.Theinstructionsandproceduresprovidedinthismanualisan
incompletedraftofunverifiedandincompleteprocedures.Thismanualisfordiscussionpurposesandshould
notbeconstruedasauthoritativeinformationinanyformastobetheequipmentdepictedwithin.Authordoes
notwarrantorassumelegalliabilityorresponsibilityforaccuracy,safety,completeness,orusefulnessofany
information,apparatus,product,orprocessdisclosedorreferredto.Informationisprovidedforinformational
purposesonly.

Anyactionsorassumptionstakenonreader’spartasaresultofanyinformationdisclosedbyAuthoraretaken
entirelyatreader’sownrisk.Furthermore,Authorshallnotbeliableforanylossofprofits,contracts,
opportunitiesoranydirect,indirect,consequentiallossofanykind(includingdeathand/orinjury),orlossof
propertyarisingoutoforinconnectionwiththeuseofinformationherein.

Newsitems,opinions,and/orstatementsposedbyAuthormaybeunsubstantiatedandshouldbeconsidered
assuch.Theadviceandstrategiescontainedhereinmaynotbesuitableforyoursituation.Youshouldconsult
aprofessionalwhereappropriate.

Kitsarenotguaranteedtofitspecificbike(s).Operatingabike,motorizedbicycleorbikewithabicycleengine
kitinstalledinvolvessomerisksofseriousbodilyinjury.Buyeracceptsresponsibilityforanyandallvehicle
operationthatmayleadtopersonalinjury,economicloss,socialdistress,otherlosses,costsanddamages
resultingfromoperatingthismotorizedbicycleorbicycleenginekit.Sellerisnotresponsibleformisuseofthis
kitoranywarrantyafterinstallation.Notallmotorizedbicycleareallowedonroaduse.Wemakenoguarantee
astotheroadlegalityofthesebikemotors.

 
BikeBerry.com
18003170479
1

BEFOREYOUSTART
Thismanualwillteachyouhowtoinstalla2strokeenginekitonabike.Nowbeforeweevenstart,it’s
importanttoknowwhatyou’regettingintoandwhatyouneedforinstallationtogoassmoothaspossible.
Eventhoughtheenginekitismadetobeasuniversalaspossible,youbikeshouldhavethesekeyfeaturesto
ensureeasierinstallation:
● Yourbikeneedstobeastandardmen’sbeachcruiser,roadbike,orhardtailmountainbike.
● Theseatanddowntubediametershouldbe2528mm(11.10in)withanopenVStyleframe
● Thekitshouldfitmost26x1.75inrearwheelwitheither12or14gauge36countspokes.
BikeBerry.com
18003170479
2



Ifyourbikematchesthese
specifications,thenyou’rereadytogo…



BikeBerry.com
18003170479
3



Components
1. 49/50ccor66/80cc2Stroke
EngineBlock
2. NTCarburetor
3. ExhaustMuffler
4. ChainGuard
5. ThrottleCable
6. ClutchCable
7. ThrottleGripAssembly
8. Killswitch
9. ClutchLever
10. ChainIdlerPulley
11. 415HDDriveChain
12. SparkPlug
13. CDI
14. 1.5or2.5LGasTank
15. FuelLine
16. FuelValve(Petcock)
17. SprocketClampAssembly
18. 44TDriveSprocket
19. HeatShieldSpring
20. ExtensionClutchSpring
21. SparkPlugRemovalTool
BONUS:UniversalUMount


 
BikeBerry.com
18003170479
4


INSTALLATION
TheRearWheelAssembly

Toolsyou’llneed:
● 2x10mmwrench
● anopenwrench
● scissors

Step1:Removethecoasterbrakearm.
Ifyourbikehasarearcoasterbrakearmattachedtotherearwheel,removeittoinstalltherearsprocket.
Makesurenottoaccidentlydisassembletheentirerearhubdoingso.Onceyouremovethecoasterbrake,
removethedustcover.
Step2:Cutaslitinoneoftherubbergrommets
BikeBerry.com
18003170479
5

Cutastraightlinebetweenanytwoholesandthreaditthroughtherearhub.Checktoseeifalltheholesare
visiblethroughthespokes.Ifaspokeiscoveringanyofthe9holes,youwillnotbeabletousethatrearwheel.
Youwillhavetofindareplacementthatiscompatible.


Step3:Alignmentcheck
Placethesecondrubbergrommetoutsideofthespokesandalignbothgrommetstogethersothe9holes
matchupevenly.


Step4:Aligntheassembly.
Thisstepisthelongerandmosttimeconsumingportionoftheinstallation.Placethesecondrubbergrommet
ontopofthe44toothrearsprocket.Itdoesn’tmatterwhichwaythe44Tsprocketisfacing.Thenstartpushing
all9boltsthroughtheassembly.


Lineuptheassemblywiththerubbergrommetinsidethehubandthreadthe3wayplatesbehindtheentire
assembly.Makesureoneofthe3platesisplacedoverthecutmadeonthefirstrubbergrommet.
BikeBerry.com
18003170479
6


Add9washersoneachboltandthreadthe9nutshandtight.

Step5:TorquingtheboltsandnutsandTruingyoursprocketadapterassembly.
Thisistheportionoftheinstallationwhereitrequiresthemostpatienceandfrequentadjustmentwhen
tighteningdownyourassembly.

Youwanttotorqueeachboltastightandevenlyaspossiblewithoutbendingthespokes.Thekeyistotorque
downeachboltinaSTARpatterntokeepthethesprocketalignmenttrue.


Thinkoftighteningeachboltdowninphases,makingsureeachboltistorqueddownevenly.Asyoutightenup
yourboltseachtime,keepwatchofyourcentersprocket.Makesureitstillstayscenteredthroughoutthis
processorelseriskhavingtountightenandretightenboltstokeepyoursprocketcenteredandaligned.

Onceitgetstighterandtighter,you’llnoticeanyoverlapyouencounteredwiththemetalplateswilldisappear.


 
BikeBerry.com
18003170479
7

Step6(OPTIONAL):Reinstallyourcoasterbrakearm.Makesureyourcoasterbrakearmcanclearthe
9boltsfromyourassembly.

Tomakesureithasenoughclearance,dryfityourcoasterbrakearmbacktothewheelandrotateitaround
thebolts.Ifitclears,thenyoucanuseyourcoasterbrakearm.Ifitdoesn’t,werecommendskippingthisstep
andinstallingcaliperbrakes.Unfortunatelytherearesomerearwheelsthatarenotcompatiblewiththis
sprocketadapterassembly.OurbestrecommendationisusingaBBRTuningrearsprocketadapterfor
easeofinstallationandbettercoasterbrakeclearance.


Alternatively,youcanbenda90degreeangleintoyourcoasterbrakearmtoprovideclearance.Ultimately,
morestoppingpowerishighlyrecommended.GettingaRear,Frontorbothcaliperbrakesisbestforyour
safety.


Step7:Reinstalltherearwheelandbikechainbackonyourbike.
BikeBerry.com
18003170479
8



Oncethesprocketistight,spinthewheelandcheckthatthesprocketrunstrue.Deviationcanbenomore
than1.5mmbothways.Anysidetosideexcessdeviationcanbecorrectedbyspinningthewheelandthen
tighteningthesprocketwhereneededinordertogetcorrectalignment.Makesureboltsaretight.

Noticetheconcavityorindentationofteethoftherearsprocketisinwardtowardsspokes.Thishelpskeepthe
chainclosertotheinsideofthewheelandspokesandallowsforbetterclearanceoftherearstaysofthe
bicycleframe.


 
BikeBerry.com
18003170479
9

MOUNTINGTHEENGINE

NotesBeforeMountingyourEngine
Enginemountingcango1of2ways:EasyorChallenging
Thisalldependsonyourbikeframe.

Example#1Easy
AnoldstylebeachcruiserframewillmorethanlikelybetheeasiestfitforaFlyingHorseorMegaMotors
enginekit.Oldstylebeachcruisershavethesamesize(diameter)toptube,downtube,andseattube.



Anotherreasonwhyoldstylebeachcruisersaretheeasiesttoinstallamotoronisbecausethepedalcranks
arecenteredbelowtheseatpost.You’llknowwhythisisimportantinaminute…

 
BikeBerry.com
18003170479
10

Example#2EasyMedium
NewStyleBeachCruisers(from2005andon)havelargerdowntubediameter,largertoptubediameter,
and/orforwardpedalingcrankposition.

Ifyouhaveanoldstylebicycle,pleasecontinuereading.Ifyouhaveanewstylebicyclewiththefollowing:
● Onlyalargerdowntube,pleasegotopage12.
● Combinationofbothlargerdowntubeandpedalingcranks,pleasegotopage15.

MountinganEngineonOlderStyleFrames:

1. Removerearandfrontenginemounthardwarefromtheengineblock.
2. Aligntheengineblockonyourframe.
3. Makesuretheengineisangledwherethetipoftheintakemanifoldsitsparallelwiththeground.
BikeBerry.com
18003170479
11

4. Reinstallfrontandrearmountinghardware.Makesuretherearandfrontmountssitflushwiththe
bicycleframe.Wheninstallingthehardware,putinthewashersfirst,thenthelockwasher,andthen
threadthenut.

MountinganEnginewithaLargerDownTube:
1. Requires:UniversalMountingBracket


2. DisassembletheUniversalMountingUMount



 
BikeBerry.com
18003170479
12


3. Removeallmountinghardwarefromfrontandrearmountingstuds.


4. Removefrontmountingstudsfromengineblock.Youcanuse1ofthe2followingtechniquesto
accomplishthis:
a. Useavicegriptoremovethefrontmountingstuds
b. Thread2nutsonbothfrontmountingstudsandtorquethejamnuttoloosenthethemounting
stud.



 
BikeBerry.com
18003170479
13

5. AligntheUMountplatewiththeholesfromthefrontmount.
6. ThreadtheUMountboltsthroughtheplate
a. Optional:Uselocktiteontheboltthreadstosecuretheassembly.


7. PlaceandAligntheengineblockinthebicycleframe.
8. Makesurethetipofthemanifoldintakeisparallelwiththeground.Thisisimportantforproperfuel
consumption.Ifit’sangled,you’llhaveproblemsfeedingyourmotorairandfuel.
9. Installtherearmounthardware,butonlyhandtightfornow.Wearenowgoingtoadjustthefront
mount.
10. InstallUBracketandthreadwasherandnutstight
a. Option,uselocktighttosecurenuts.
11. Installrearmotormounthardwaretocompletetheenginemount.


 
BikeBerry.com
18003170479
14

MountinganEnginewithForwardPedalingCranks+LargerDownTube

1. Requires:JNMVibrationMotorMount+HeavyDutyUniversalUMount


2. Removeallmountinghardwarefromfrontandrearmountingstuds.


 
BikeBerry.com
18003170479
15


3. Removefrontandrearmountingstudsfromengineblock.Youcanuse1ofthe2followingtechniques
toaccomplishthis:
a. Usevicegriptoremovethefrontandrearmountingstuds.
b. Thread2nutsonbothfrontandrearmountingstudsandtorquethejamnuttoloosenthe
mountingstud.

 
BikeBerry.com
18003170479
16


4. InstalltheextendedfrontandrearstudsfromtheJNMVibrationMotorMountassembly.
a. option:UseLocktitetosecurestudsinsideengineblock.
5. Thenthreadtherearmountingbracketandbothfrontandrearrubbermount.



 
BikeBerry.com
18003170479
17


6. PositionEngineinsidethebikeframe.Makesuretheintakemanifoldisparallelwiththeground
7. TaketheHDUMountplateandthreadthetopholepatternthroughthefrontmotormount.
8. Place1ofthe2Ubracketsonthebottomholdpatternsoverthelargerdowntube.
9. Threadthewasher,lockingwasherandnutsforthefrontmount.
10. Threadtheremainingrearmountassemblyfortherearmountingstuds.



 
BikeBerry.com
18003170479
18