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| Motorized Bicycle General Discussion Topics on bicycle engine kits, help articles, repair and modifications for your motorized bicycles |
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01-14-2009, 12:27 AM
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Motorized Bicycle Senior Member
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Join Date: Jan 2009
Location: dana point, ca.
Posts: 53
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Motor Question...
I've Started A Build Converting My Cruiser( Collector Item) Into A Motor Bike. I've Started Installation Using A China 2 Stroke Kit. I've Re-fabed Most Of The Hardware And Had My Orig. Paint Matched For The Engine, Clutch, Covers For A Three Stage Paint Job( Ill Do). I Also Purchased A Jackshaft Kit( Well Engineered) So I Can Run My Brand-new 3 Speed Internal Hub. Ok Now ,im Having Serious Second Thoughts About The China Motor Being That It Nseems To Be A Hit Or Mis On Them, I Need Some Reliability.(from What Ive Read). So Now For My Question: I Want To Utilize My Jackshaft Kit ( Made To Transfer From Left Side To Right Utilizing Original Drive) But Need Your Expertise On Purchasing A More Reliable Motor That Is Set Up Similarly To The China 2 Strokes I.e.- Output/ Gear On Left Side And Clutch Accessible Via Cable( For Switching 3 Speed Gear) Im Thinking Of Around 4 Hp. Im A 15 Year Diesel,auto Mechanic And Fabricator/ Engineer (tig,mig)... Ect... So Im Expecting Some Fab..but Would Like To Do It Right The First Time!!!.do You Have Something I Can Start With? So, Need An Engine 2 Stroke, 4 Stroke( Too Wide) 4-5.5 Hp,gear Output Shaft Left Side, Ill Be Bump Starting It , So Pull Start Is Fine (i.e No Elec Start)- Ill Need A Clutch To Manually Use (cable) For Starting, Stopping, And M  ostly Shifting. Please Help!!!AWE MAN, DONT KNOW HOW TO POST PICS...?
Last edited by WOLF IV; 01-14-2009 at 01:14 AM.
Reason: TRY TO ADD PIC.
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01-14-2009, 04:04 AM
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Motorized Bicycle Elite Member
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Join Date: Nov 2008
Location: Manchester TN USA
Posts: 465
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Re: Motor Question...
don't let the hype fool you on the 2 stoke motors if broken in properly and regular maintenance they can run for years improve upon the design and making things better is half the fun there are some nice 4 stroke in frames out there and you do get what you pay for but the readily available replacement parts for the 2 strokes make them that much more fun. besides the 4 bangers don't get that motorbike sound. if you install any kit take your time and mount the engine solid and ride on.
Ride it like you stole it!
Last edited by MB-Monkey; 01-14-2009 at 04:05 AM.
Reason: spellinmg error
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01-14-2009, 06:06 AM
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UK Dealer
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Join Date: Jun 2008
Posts: 465
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Re: Motor Question...
Quote:
Originally Posted by HuffyCruiser
Ride it like you stole it!
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LOL!!
__________________
For EU and UK Kits/Parts/Fully fitted bikes.
Visit us at www.TigerToothBikes.com -
'Engines Ignited By the Finest Cigar'
"Tigertooth built him a jet
When his parts come in he'll be set
The pulse was so cool
It'd make a guy drool
He'll put one on a bike now I bet....................." - Ilikeabikea
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01-14-2009, 09:19 AM
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Godfather of Motorized Bicycles
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Join Date: Jan 2008
Location: Ashtabula county, Ohio
Posts: 10,003
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Re: Motor Question...
All the kits are easily made reliable, few are that way out of the box.
A blind pig will find a ripe acorn once in awhile though....
__________________
If it ain't broke, and you mess with it long enough, it will be.
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01-14-2009, 05:05 PM
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Motorized Bicycle Elite Member
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Join Date: Jun 2008
Location: Longmont, CO
Posts: 1,596
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Re: Motor Question...
Yeah, just break them in properly and keep some spare parts and you're good to go.
Replace all the studs and other hardware with good American made stuff, replace the spark plug with a nice NGK, replace plug wire with good automotive wire, and keep a spare magneto and CDI on hand.
Not much can go wrong after that (except the ring retaining pin coming out, the rings rotating and trashing the cylinder like happened to me)
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01-14-2009, 09:37 PM
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Motorized Bicycle Elite Member
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Join Date: Dec 2008
Location: Gainesville FL.
Posts: 488
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Re: Motor Question...
After I broke mine in and did a bolt check(a must everytime you ride it)...I went out and RODE it, and I don`t go too easy on them, but do know the limit...And mine is still going strong....I`m in FLA. and can ride alot...So it doesn`t sit around much....And I like to tinker with it....
__________________
Life in the Fast Lane......
If your living on the edge , you`re taking up too much space....
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01-14-2009, 10:49 PM
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Motorized Bicycle Senior Member
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Join Date: Jan 2009
Location: dana point, ca.
Posts: 53
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Re: Motor Question...
Im Going To Do All The Upgrade Before Inst... 45 Piston On Exh. Side, Port Match, Polish..... Ill Leave The Carb Alone Although The Drilling Hole Thing Sounds Good.. Oh I Also Need To See If My Skirt Is Inerfering .. If So Ill Trim It As Well.. What Kind Of Mph Should I Be Seeing? 34t , 3 Speed Hub, 26'' Wheels, Im 165lbs. I Also Bought The 9&11t- Sprockets For The Jack Kit...oh Ive Got A Tuned Pocket Bike Pipe Coming As Well. I Made An Exhaust Tip From 1'' Stainless Today And Will T/a Pipe Length Before Exp. Chamber For Torque And W/ And W/out Cilencer...if All This Is A Waste Of Time, Ill Put In A 80cc Kx Or Yz.
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01-14-2009, 10:58 PM
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Motorized Bicycle Senior Member
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Join Date: Jan 2009
Location: dana point, ca.
Posts: 53
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Re: Motor Question...
Quote:
Originally Posted by stuartracing
After I broke mine in and did a bolt check(a must everytime you ride it)...I went out and RODE it, and I don`t go too easy on them, but do know the limit...And mine is still going strong....I`m in FLA. and can ride alot...So it doesn`t sit around much....And I like to tinker with it....
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ILL BVE RIDING IT TO AND FROMWORK OFTEN!!! 10 MI. ROUND TRIP.
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01-16-2009, 04:17 AM
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Motorized Bicycle Elite Member
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Join Date: Jan 2009
Location: Beaverton OR
Posts: 143
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Re: Motor Question...
Any Idea How to get the drive sprocket off the shaft? I can't seem to get the bolt off the sprocket in the first place.
Any info would be gratefully appreciated.
Thank's Mike Frye A.K.A. Frye Bikes
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01-16-2009, 07:35 AM
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Motorized Bicycle Elite Member
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Join Date: May 2008
Posts: 305
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Re: Motor Question...
Quote:
Originally Posted by WOLF IV
Im Going To Do All The Upgrade Before Inst... 45 Piston On Exh. Side, Port Match, Polish..... Ill Leave The Carb Alone Although The Drilling Hole Thing Sounds Good.. Oh I Also Need To See If My Skirt Is Inerfering .. If So Ill Trim It As Well.. What Kind Of Mph Should I Be Seeing? 34t , 3 Speed Hub, 26'' Wheels, Im 165lbs. I Also Bought The 9&11t- Sprockets For The Jack Kit...oh Ive Got A Tuned Pocket Bike Pipe Coming As Well. I Made An Exhaust Tip From 1'' Stainless Today And Will T/a Pipe Length Before Exp. Chamber For Torque And W/ And W/out Cilencer...if All This Is A Waste Of Time, Ill Put In A 80cc Kx Or Yz.
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I would advise against modifying your motor until after you get it on the bike and running nice. Then do the modifications one at a time so that if it doesn't run right after you mod it you will know why. I also prefer to modify the port rather than the skirt. A jug is cheap and much easier to replace than the piston. Get the motor on the bike and the bugs worked out. Then add the expansion chamber. When you get that working good move on to the next thing and have fun!
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