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 Post subject: Big Bore Setups
PostPosted: Wed Mar 25, 2009 9:20 pm 
First, thanks to Spoon for finally making this section.

The following was posted in our unofficial thread but I thought I'd make it official. When posting big bore issues/comments in this section, we should leave our specs so we can all compare, and figure out what works best for different types of setups. I think the goal of everyone that goes honda big bore is to share the knowledge, and eventually do what we can to unlock the motor's full potential. If you have any more ideas, please feel free to add.

ENGINE
Motor mods:
Lightened Flyhweel:
HO Cam:
PC/JC20 Carb (yes/no):
Brand of (carb keihin / sheng wey):
main jet:
slow jet:
needle setting:
Which filter on carb:
Exhaust:

Transmission
Variator:
Roller weights and brand:
Clutch springs (blue or pink):
Gear Kit:

Other
cdi:
hitting rev limit (yes / no):

Wheel
Rear Wheel size:
Rear Tire size:
PSI:
Tire Brand:

Environment Factor
Elevation:
Temperature at time of test:
Weight:
Top Speed Flats (no wind):
Top Speed downhill (no wind):

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Last edited by kim jong ill on Wed Mar 25, 2009 10:29 pm, edited 5 times in total.

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TR Ride of the Month!
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 Post subject: Re: Finally. BIG BORE SECTION - roll call
PostPosted: Wed Mar 25, 2009 9:27 pm 
i'll go first:

ENGINE
Motor mods: jc racing 58.1cc big bore motor, ported head, polished valves
Lightened Flyhweel: yes
HO Cam: yes
PC/JC20 Carb (yes/no): pc20
Brand of (carb keihin / sheng wey):shengway
main jet: 82
slow jet: 32
needle setting: richest
Which filter on carb: k & N with shield
Exhaust: Yosh TI Cyclone

Transmission
Variator: polini
Roller weights and brand: dr pulley's 5.5g
Clutch springs (blue or pink): blue
Gear Kit: kitaco

Other
cdi: posh
hitting rev limit (yes / no): no

Wheel
Rear Wheel size: 10x8
Rear Tire size: 225/40/10
PSI: ?
Tire Brand: innova

Environment Factor
Elevation: 338ft
Weight: 190
Top Speed Flats (no wind): 56.4mph
Top Speed downhill (no wind): 59.8mph, gps verified.

Image

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Originator of The HATe
you don't choose 2t, 2t chooses you.
:nunya:
tuners tune on las tunas eatin tuna fish samiches!
http://vimeo.com/kiwi2racing
http://kiwi2racing.com/
1-900-COM-RADE
http://www.facebook.com/pages/Kiwi2Raci ... 16?sk=wall


Last edited by kim jong ill on Thu Apr 01, 2010 12:19 pm, edited 9 times in total.

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 Post subject:
PostPosted: Wed Mar 25, 2009 10:06 pm 
ENGINE
Motor mods: 58.1cc BIG BORE
Lightened Flyhweel: YES
HO Cam: YES
PC/JC20 Carb (yes/no): YES
Brand of (carb keihin / sheng wey): KEIHIN
main jet: TBA
slow jet: 35
needle setting: LOWEST CLIP (RICHEST)
Which filter on carb: CUSTOM INTAKE W/OILED FOAM FILTER
Exhaust: JDM YOSHIMURA

Transmission
Variator: KN KIKAKU
Roller weights and brand: JC RACING 5.85
Clutch springs (blue or pink): STOCK
Gear Kit: MET FINAL GEAR

Other
cdi: KITACO
hitting rev limit (yes / no): NO

Wheel
Rear Wheel size: RPM
Rear Tire size: 130/90/10
PSI: 35
Tire Brand: MICHELIN BOPPER

Environment Factor
Elevation: SEA LEVEL OR BELOW
Temperature at time of test: 90
Weight: 200
Top Speed Flats (no wind): TBA
Top Speed downhill (no wind): TBA

Update 8-10-09
Will hopefully finish tuning and start changing other parts that I planned on changing after the jetting is done in a couple weeks due to a race coming up this weekend.

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Last edited by jc250r31 on Mon Aug 10, 2009 10:43 am, edited 4 times in total.

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Space Docker
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 Post subject: Re: Big Bore Setups
PostPosted: Wed Mar 25, 2009 10:28 pm 
How about ambient temperature at the time of test ? :P

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 Post subject: Re: Big Bore Setups
PostPosted: Wed Mar 25, 2009 11:06 pm 
ENGINE
Motor mods: JC Racing 58.1cc big bore motor, ported, polished & flowed by JC
Lightened Flyhweel: Yes
HO Cam: Yes
PC/JC20 Carb (yes/no): Yes
Brand of (carb keihin / sheng wey): Keihin
main jet: 82
slow jet: 38
needle setting:full rich
Which filter on carb: K&N with 1/2 shield, U-shaped cold air tube
Exhaust: NCY-R

Transmission
Variator: Polini
Roller weights and brand: Dr. Pulley, 5.5g
Clutch springs (blue or pink): blue
Gear Kit: full Metro, ie: 45:13

Other
cdi: Posh w/ 10.5K
hitting rev limit (yes / no): No
Wheel
Rear Wheel size: 10x8, 3.25 inside SB, 4.25 outside SB, 7.75 actual overall width
Rear Tire size: 205/50-10 (56.77 R.O./Circumference, 8.25 actual overall width)
PSI: 30
Tire Brand: Kenda

Environment Factor
Elevation: 2400 ft
Temperature at time of test: 60
Weight: 470 total (195 bike, 275 rider)
Top Speed Flats (no wind): 46 (Veypor)
Top Speed downhill (no wind): 50 (Veypo)[/quote]

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Last edited by SoAzRC on Thu Apr 09, 2009 1:44 pm, edited 5 times in total.

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Habitual Offender
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 Post subject: Re: Big Bore Setups
PostPosted: Thu Mar 26, 2009 4:18 am 
sounds like your running way rich with the filter on


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 Post subject: Re: Big Bore Setups
PostPosted: Thu Mar 26, 2009 4:52 am 
I would say your rich with the filter on, but I have the KN with a J pipe and with it on and off there really isn't a discernible difference in jetting and flow..if I blow through the filter it feels the same as with no filter..so for it to make a dramatic difference in performance is beyond me..

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 Post subject: Re: Big Bore Setups
PostPosted: Thu Mar 26, 2009 9:12 am 
My setup: updated!
ENGINE
Motor mods: DPR qench welded and singh groove head, 13.2:1 compression, Chanito piston, WPC treatment of bore, piston, rings, piston pin, cam, valve springs, rockers and rocker shafts, ceramic coating of piston, combustion chamber, valve faces and exhaust port, lightened rockers, retainers, and valves.
Lightened Flyhweel: JCR Flywheel
HO Cam: BSS cam
PC/JC20 Carb (yes/no):Sheng Wei Bowls PC20 kit (I like this because of the heat isolator)
Brand of (carb keihin / sheng wey):Sheng Wei
main jet:82
slow jet:50
needle setting:Richest low postion
Which filter on carb: Big K&N shrouded
Exhaust:JDM Yoshimura

Transmission
Variator: Polini WPC anti friction treated
Roller weights and brand:Dr Pulley 4.5 gram
Clutch springs (blue or pink):Dr Pulley HiT clutch with no pillow lock up spring for maximum lock up and black 14 kg stall springs, Yamaha Jog conta pulley and torque driver, Malossi red contra spring and torsion controller. Clutch engauges hard at 7000 rpm, flashes to 9000, then falls to around 8800 and pulls hard.
Gear Kit: Kitaco All gears WPC anti friction treated

Other
cdi:Posh 10500 limit
hitting rev limit (yes / no): No, 10,300 rpm tops with current setup but probably will at over 57 mph under the right conditions

Wheel
Rear Wheel size: Dio Alloy stock size 120
Rear Tire size:Dio Alloy stock size 130
PSI: 35
Tire Brand: Bopper

Environment Factor
Elevation:Close to sea level
Temperature at time of test: 70's
Weight:210 lbs with gear on
Top Speed Flats (no wind):58.5 pegged on the rev limiter
Top Speed downhill (no wind): 58.5 pegged on the rev limiter

I think this is the fastest of the stock honda engines. It feels really good!


Last edited by smartbomb on Mon Aug 31, 2009 5:57 pm, edited 10 times in total.

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Rusty Trombonner
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 Post subject: Re: Big Bore Setups
PostPosted: Thu Mar 26, 2009 2:21 pm 
ENGINE
Motor mods: 58.1cc, P&P head, Singh Groove
Lightened Flyhweel: yes
HO Cam: yes
PC/JC20 Carb (yes/no): yes
Brand of (carb keihin / sheng wey): SW
main jet: Can't remember
slow jet: Can't remember
needle setting: Can't remember
Which filter on carb: Came with carb
Exhaust: Burial Stinger

Transmission
Variator: KN shaved spacer, 1/32"
Roller weights and brand: 35.1 total grams. Mix of Honda and Polini
Clutch springs (blue or pink): pink
Gear Kit: stock

Other
cdi: Posh 10.5
hitting rev limit (yes / no): all the time

Wheel
Rear Wheel size: 10"
Rear Tire size: 130
PSI: dunno
Tire Brand: Bopper

Environment Factor
Elevation: Seal Level
Temperature at time of test: Cold
Weight: 175 lbs
Top Speed Flats (no wind): ~50
Top Speed downhill (no wind): 62.5mph/100kmh non GPS verified

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scooTVdude
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 Post subject: Re: Big Bore Setups
PostPosted: Thu Mar 26, 2009 2:34 pm 
Yea Weight made it in as a factor!!!!

-Honest

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 Post subject: Re: Big Bore Setups
PostPosted: Thu Mar 26, 2009 4:22 pm 
Image

ENGINE
Motor mods: 58.1cc
Lightened Flyhweel: yes
HO Cam: no
PC/JC20 Carb (yes/no): yes
Brand of (carb keihin / sheng wey): SW
main jet: 82
slow jet: 35
needle setting: lowest
Which filter on carb: K&N Covered
Exhaust: JDM Yoshimura CF

Transmission
Variator: Polini
Roller weights and brand: 6.0gm OEM Honda Metropolitan
Clutch springs (blue or pink): blue
Gear Kit: stock

Other
cdi: Posh unlimited
hitting rev limit (yes / no): N/A

Wheel
Rear Wheel size: 10" Gunmetal DIO
Rear Tire size: 130
PSI: 32 psi
Tire Brand: Pirelli SL26

Environment Factor
Elevation: 0-500ft
Temperature at time of test: Cold
Weight: 175 lbs
Top Speed Flats (no wind): unknown (generally hit 65 km/hr easily)
Top Speed downhill (no wind): unknown (68 km/hr)

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Sith Slayer
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 Post subject: Re: Big Bore Setups
PostPosted: Sat Mar 28, 2009 7:37 pm 
i think it would be wisco.

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Junior Mint
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 Post subject: Re: Big Bore Setups
PostPosted: Mon Mar 30, 2009 6:27 pm 
ENGINE
Motor mods: 58.1cc
Lightened Flyhweel: yes, jc
HO Cam: yes, jc
PC/JC20 Carb (yes/no): yes, jc
Brand of (carb keihin / sheng wey): dunno
main jet: 85
slow jet: 38
needle setting: richest
Which filter on carb: one that comes with jc20
Exhaust: stock

Transmission
Variator: polini
Roller weights and brand: 3 6g weights, 3 stock
Clutch springs (blue or pink): none
Gear Kit: yes, met final gear

Other
cdi: kitaco cdi? I think that's what it's called.... plug and play, totally worth it
hitting rev limit (yes / no): don't think so (hard to tell with stock exhaust)

Wheel
Rear Wheel size: stock
Rear Tire size: stock
PSI: dunno
Tire Brand: stock

Environment Factor
Elevation: sea level
Temperature at time of test: 71 F
Weight: 172lbs
Top Speed Flats (no wind): ~50mph (no exact gps verification, although the one time I used my gps I got it to 48, and I've tunned it since and it feels much faster now)
Top Speed downhill (no wind): no hills (louisiana)

Will be changing the variator setup soon (got some weights coming in the mail soon), so I'll update as soon as I've tested out different weight combo's :banger:

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 Post subject: Re: Big Bore Setups
PostPosted: Tue Mar 31, 2009 7:32 pm 
ENGINE
Motor mods:JC Big Bore
Lightened Flyhweel:Yes
HO Cam:Yes
PC/JC20 Carb (yes/no): JC20
Brand of (carb keihin / sheng wey):sheng way
main jet:89
slow jet:35
fiter on carb: JC20
needle setting:untouched
:Exhaust:NCY (non R)

Transmission
Variator:Polini
Roller weights and brand: dr pulley 7g
Clutch springs (blue or pink):neither
Gear Kit:Stock

Other
cdi:None yet
hitting rev limit (yes / no):Yes

Wheel
Rear Wheel size:stock
Rear Tire size:stock
PSI:not sure
Tire Brand:kendra

Environment Factor
Elevation:n/a
Temperature at time of test:~70 degrees
Weight:150
Top Speed Flats (no wind):47 mph gps verified
Top Speed downhill (no wind):47 hits limiter


Last edited by Risingsunruck on Wed Apr 01, 2009 2:12 pm, edited 1 time in total.

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 Post subject: Re: Big Bore Setups
PostPosted: Wed Apr 01, 2009 9:19 am 
ENGINE
Motor mods:Chanito BB
Lightened Flyhweel:No
HO Cam:Yes
PC/JC20 Carb (yes/no): No
Brand of (carb keihin / sheng wey):N/A
main jet:88
slow jet:35
fiter on carb: K&N w/ Chrome Cover
needle setting:Shimmed up (about 2-3 mm)
Exhaust: Daytona Drag

Transmission
Variator:Polini
Roller weights and brand: Honda Metro (6g)
Clutch springs (blue or pink): None
Gear Kit:Stock

Other
cdi:Yes, Posh No Limit
hitting rev limit (yes / no):Yes

Wheel
Rear Wheel size: RPM 12 Spoke
Rear Tire size: 130/90/10 (Stock)
PSI: 30-35
Tire Brand: Bopper

Environment Factor
Elevation:3,438 ft above sea level
Temperature at time of test: 18-20 C
Weight: 165 lbs
Top Speed Flats (no wind):78 km/h - Veypor Verified
Top Speed downhill (no wind): Don't like pushing the engine above 9500 revs but 84 km/h has been seen


Currently just rebuilt the motor with my 970 PP head and havent had the chance to get it tested with the new head. Hopefully I will see an increase in speed from my current numbers. The setup and data listed was from before I added the new head

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