Farfle's Race bike

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Farfle   1 MW

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Farfle's Race bike

Post by Farfle » Aug 29 2011 4:28pm

Building a bike to race in the upcoming SoCal race, heres some specs:

Bike: Genesis 2100 full susp mtn bike. pretty much just the frame left stock.
Battery: Turnigy 24s2p 5000mah 25c cells
Motor: either a 5303 or 5304 in a 20" wheel. Super modded with Xl cooling vanes and 8 Awg phase wires.
Controller: Either a crazy modded crystalyte 12-fet or lyen 18-fet. probably running around 8-9 kw.
Tires: 20" Kenda Kraze 20x3 on a 32mm rim in the front and a 44mm rim in the back.
Brakes: Gatorbrake 6 piston with 203mm rotor in the front and an Avid BB7 and 160mm rotor in the back.

Ill add some pictures and progress as it goes on.
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Farfle   1 MW

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Re: Farfle's Race bike

Post by Farfle » Sep 03 2011 12:17am

just a tease as the build goes along :D

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Arlo1   100 GW

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Re: Farfle's Race bike

Post by Arlo1 » Sep 03 2011 12:24am

A hubbie race bike hu? Why not put some forced cooling in the motor?
Does your project need a high performance motor drive, battery charger or other power electronics developed? Let's talk!
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Farfle   1 MW

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Re: Farfle's Race bike

Post by Farfle » Sep 03 2011 12:39am

It will be getting some serious forced cooling. Cant tell all but its 68 cu/in and 4.5k PSI.
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Re: Farfle's Race bike

Post by Arlo1 » Sep 03 2011 8:54am

Farfle wrote:It will be getting some serious forced cooling. Cant tell all but its 68 cu/in and 4.5k PSI.
Awesome. I have a E'l cheepo hobbyking ducked fan I was going to try but it was so out of true it just smoked it self!
Does your project need a high performance motor drive, battery charger or other power electronics developed? Let's talk!
www.powerdesigns.ca
Leaf motor controller build. http://endless-sphere.com/forums/viewto ... 27#p963227
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Never above 4.2v never below 2.7v EVER!!!
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bzhwindtalker   1 MW

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Re: Farfle's Race bike

Post by bzhwindtalker » Sep 04 2011 7:18am

beware with this wallmart frame ;) so cheap though... I'm looking forward on what you will come up with. Don't you think a proper race bike need to have a longer wheelbase? You will flip it over really easy if you want to accelerate really fast :)

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Re: Farfle's Race bike

Post by TylerDurden » Sep 04 2011 7:22am

bzhwindtalker wrote:Don't you think a proper race bike need to have a longer wheelbase?
Agree. That 4-link swingarm would be very easy to extend...
Have a Nice Day,

TD

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Re: Farfle's Race bike

Post by bzhwindtalker » Sep 04 2011 8:49am

Image
Thats how I did it on my frame, it ended up bending just under where the motor mounts, but I was jumping and offroading a lot :oops: I'm now making a new swing arm and modding the suspension. I really like your tires/rims combo, SLIIIIKKK ;)

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Farfle   1 MW

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Re: Farfle's Race bike

Post by Farfle » Sep 04 2011 11:37am

I could TIG together an extended swingarm for it, but unless its a problem I don't want to do any welding on it. Limited to 8kw and with the batt in front of and below the triangle, plus my fat arse onboard it shouldn't be a problem. at least not until I get a 54xx motor :twisted: .
bzhwindtalker wrote:beware with this wallmart frame ;) so cheap though... I'm looking forward on what you will come up with. Don't you think a proper race bike need to have a longer wheelbase? You will flip it over really easy if you want to accelerate really fast :)


This wallyworld frame is pretty tough, it stood up to my QC tests :twisted: which involved quickly bolting on the hubmotor and strapping on 4 10lb dive weights to the top tube. And then hitting a 3' drop till I got tired of hearing the rear shock go THUD so I am not going to mess with it. I may get one of the offset seat posts to move it forward a few inches, but it all depends on how it performs.
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MotorBicycleRacing   100 W

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Re: Farfle's Race bike

Post by MotorBicycleRacing » Sep 11 2011 6:11pm

...........................................................
Last edited by MotorBicycleRacing on Sep 11 2011 7:54pm, edited 1 time in total.

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Farfle   1 MW

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Re: Farfle's Race bike

Post by Farfle » Sep 11 2011 7:45pm

more pics as progress goes on, controller is mounted, rear wishbone is done and the battery box materials are here. also picked up a new shock but there's no spring! :shock: .

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bzhwindtalker   1 MW

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Re: Farfle's Race bike

Post by bzhwindtalker » Sep 12 2011 5:07am

Now you are talking about serious power to the ground ;) I bet you like the handling now, longer wheelbase bikes wok better at high speed IMO! Nice welds too ;)

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Farfle   1 MW

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Re: Farfle's Race bike

Post by Farfle » Sep 12 2011 9:18am

bzhwindtalker wrote:Now you are talking about serious power to the ground ;) I bet you like the handling now, longer wheelbase bikes wok better at high speed IMO! Nice welds too ;)
Thanks mate, just learning how to TIG steel, have been doing aluminum sprinkler pipe forever, but steel is a whoole different game :D .
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TylerDurden   100 GW

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Re: Farfle's Race bike

Post by TylerDurden » Sep 12 2011 10:38am

Looks great. :D
Have a Nice Day,

TD

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Farfle   1 MW

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Re: Farfle's Race bike

Post by Farfle » Sep 13 2011 10:10pm

:D 888 watt-hour in the triangle :D
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Re: Farfle's Race bike

Post by bzhwindtalker » Sep 14 2011 4:45am

Are those the 6s 8ah? Thats probably my next battery buy. How will you secure them to the frame?

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Re: Farfle's Race bike

Post by Microbatman » Sep 14 2011 1:03pm

Great build!!!
Finally someone putting a full suspension 20 inch bike together that does not weigh a ton and is strong as an ox. Also like the stealth real bike look.
Super job on the swing arm.
Love the idea of just modding the lower arm and keeping the rest stock. Makes duplicating this easier than having to fab a hole new rear assembley.
Who made the swing arm?
Keep up the great work. You have raised the bar.
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Farfle   1 MW

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Re: Farfle's Race bike

Post by Farfle » Sep 14 2011 3:39pm

Microbatman wrote:Great build!!!
Finally someone putting a full suspension 20 inch bike together that does not weigh a ton and is strong as an ox. Also like the stealth real bike look.
Super job on the swing arm.
Love the idea of just modding the lower arm and keeping the rest stock. Makes duplicating this easier than having to fab a hole new rear assembley.
Who made the swing arm?
Keep up the great work. You have raised the bar.
Thanks mate :D . hoping it performs as well as it looks! got the rear wheel spinning today, albeit the wrong way :(
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Re: Farfle's Race bike

Post by Jay64 » Sep 15 2011 8:56am

Great build man. I look forward to seeing it.
Farfle wrote:Thanks mate :D . hoping it performs as well as it looks! got the rear wheel spinning today, albeit the wrong way :(
Just turn the bike around and hammer the throttle. You might need to get some bar end mirrors or something though. :lol: :lol:
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Re: Farfle's Race bike

Post by Farfle » Sep 28 2011 9:47am

Good news :D Battery mounting is done Bad news... :( not posting anymore pics until the race!
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Re: Farfle's Race bike

Post by Thud » Sep 28 2011 10:35am

CHICKEN!

:mrgreen:
get some......

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Farfle   1 MW

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Re: Farfle's Race bike

Post by Farfle » Sep 28 2011 1:09pm

Thud wrote:CHICKEN!
That's me, maybe one more picture tho...


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Re: Farfle's Race bike

Post by nicobie » Sep 28 2011 2:22pm

It that a saw blade you re-purposed as a disc? :shock:

I noticed the old fashioned expansion slots/plugs.
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Re: Farfle's Race bike

Post by Whiplash » Sep 28 2011 2:43pm

It does look like a diamond blade doesn't it?!!
Power is a fascinating thing, the more you have, the more you want, but the real power is having the restraint not to use it all at once...............Um...Yeah..

The harder you work.....The luckier you get!!

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Farfle   1 MW

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Re: Farfle's Race bike

Post by Farfle » Sep 28 2011 2:43pm

nicobie wrote:It that a saw blade you re-purposed as a disc? :shock:

I noticed the old fashioned expansion slots/plugs.
Very good eye, it is indeed a saw blade, $20 harbor freight cheapo 12" thin kerf blade, bolted on with the sidecover screws.
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