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Discussion Starter #1 (Edited)
Ive seen many threads asking about track prep or tire recommendations etc...

But i havent seen one yet with full builds top to bottom so here we go!

This is my little superstocker build. I ride out at JRP Tulsa every week and still street from time to time but mostly track now.
Post up your builds lets see what everyone's got !!


-Finbro 125 2V head w/oversized valves
-DCR Stage 2 cam
-OTB Cam Cover
-Koso 34mm TB flipped
-K&N Filter
-MNNTHBX Dual Underbody exhaust
-Finbro ECU
-PCX150 Injector
-Oversized fuel line
-EFIE set at -180MV (12.8 AFR)
-Race-Gas (105 Octane)
-Nology Ignition Kit
-NGK Iridium Plug
-Bazzaz ZFI
-Bazzaz Traction Control
-Bazzaz Quickshifter
-GP Shift
-Ohlins front fork kit
-CNCFX fork brace
-YSS Stage 2 rear shock
-PMT Soft front/rear slicks
-Galfer Rotors
-Galfer SS lines
-Galfer Pads
-RCB 2 piston front caliper
-YSS stabilizer kit w/cncfx damper
-Ebay rearsets
-Pro Taper Contor CR High oversized bars
-IR lap timer
-Shorty levers
-13T front sprocket and 38T rear
-T-Rex engine brace/sliders
-Removed turn signals, rear fender, and all the emissions crap.
-Chimera Fuel Vent Cap


39397609_10156930433137214_414828368312139776_n.jpg 39467543_10156930432382214_5756215234247262208_n.jpg 39284473_10156930432752214_1973294793974874112_n.jpg
 

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Discussion Starter #3
Nice build

What no crank case vent system to reduce internal engine pressure and heat.

Race safe
i still have the line coming out of the tank but took out that big catch can looking thing and bracket. I used the space to mount all my bazzaz stuff lol.
 

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cool track bike S1K!

I'm looking to upgrade my grom after my first track experience. Brakes, and suspension are at the top of my list.
 

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Good stuff!!! I am going to have mine on track tomorrow for the first time. She will be different to the XR120SM but looking forward to having real suspension and brakes lol.
 

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508 Posts
2015 Grom
Pro Taper KLX110 bars
Pro Taper grips
Chinabay shorty levers
Oxford bar ends
Ohlins fork cartridges
ND4 fork mod
KW rear shock
Dunlop TT93 100/90F 120/80R
13/43 PBI sprockets
Gold DID o-ring chain
G-Craft backstep plates
Rear reservoir delete
Stainless brake lines
Stubby chinesium pegs
Finbro ECU
EFIE
DCR R1 cam
DCR PnP head and manifold
Kitaco 12.2:1 piston
L/W spinner
Silicone intake tube
Uni air filter
Tyga Stainless high mount
 

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499 Posts
2015 Grom
Pro Taper KLX110 bars
Pro Taper grips
Oxford bar ends
Ohlins fork cartridges
ND4 fork mod
KW rear shock
Dunlop TT93 100/90F 120/80R
13/43 PBI sprockets
Gold DID o-ring chain
G-Craft backstep plates
Rear reservoir delete
Stainless brake lines
Stubby chinesium pegs
Finbro ECU
EFIE
DCR R1 cam
DCR PnP head and manifold
Kitaco 12.2:1 piston
L/W spinner
Silicone intake tube
Uni air filter
Tyga Stainless high mount
You run EFIE and Finbro ECM? Wouldn't Finbro ECM just be enough?
 

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303 Posts
Discussion Starter #8
lets see a pick of that bad boy farkas!! and you are running 13/43 gearing on a 125??? or did you mean 13/34?
 

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Ive seen many threads asking about track prep or tire recommendations etc...

But i havent seen one yet with full builds top to bottom so here we go!

This is my little superstocker build. I ride out at JRP Tulsa every week and still street from time to time but mostly track now.
Post up your builds lets see what everyone's got !!


-Finbro 125 head w/oversized valves
-DCR Stage 2 cam
-Koso 34mm TB flipped with filter directly mounted.
-MNNTHBX Dual Underbody exhaust
-Finbro ECU
-PCX150 Injector
-Oversized fuel line
-Nology Ignition wire kit
-Bazzaz ZFI+TC+QS
-Ohlins front fork kit
-CNCFX fork brace
-YSS Stage 2 rear shock
-PMT Soft front/rear slicks
-Galfer rotors, lines, and pads.
-RCB 2 piston front caliper
-YSS stabilizer kit w/cncfx damper
-Ebay rearsets w/ GP shift
-Pro Taper Contor CR High oversized bars
-IR lap timer
-Shorty levers
-Yoshimura bar ends
-13T front sprocket and 36T rear
-T-Rex engine brace/sliders
-Removed turn signals, rear fender, and all the emissions crap.
you still running the link that lifts the rear an inch? I ordered one just haven't installed it yet
 

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Discussion Starter #10 (Edited)
you still running the link that lifts the rear an inch? I ordered one just haven't installed it yet
i never installed it. I need to lift the front as well and I'm hesitant about the fork mod. the issue i have with the fork mod is the fact that i will bottom out sooner and i need all the travel i can get out of that front shock don't need it bottoming out even sooner than it already does lol. No point in installing it on the rear only it would change the geometry and i don't think in a good way, it would be asking way to much of the front end.

I just plan on selling my current suspension set up to a friend and going the K-tech route. great suspension and it lifts the bike up a bit front and rear.
 

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2015 Grom (Track Mode)
Protaper Contour "Carmichael"
Woodcraft Bar End sliders
Woodcraft Axle Sliders
the2Wheels riser pegs
Ohlins fork kit
RB MonoR shock
Galfer SS front line
XR100 number plate
Chimera intake
14T front sprocket
Dunlop TT93 100/120
XT Racing GPX Pro

(Street Mode)
VG Fender
Ebay Folding Bar Mirror
*Put the headlight back on lol*
 

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508 Posts
lets see a pick of that bad boy farkas!! and you are running 13/43 gearing on a 125??? or did you mean 13/34?
Not the best images, but you get the idea. Definitely 13/43, occasionally 13/45 depending on which track I'm at. Biggest downfall to the Grom is the 4-speed trans. Between 2nd and 3rd is miles apart, and between 3rd and 4th is closest ratio. The more you take advantage of exponential gearing on the Grom and it's powerband between the two shortest gears, the quicker you'll be. I've determined the fastest part of the track is around 52-53mph for most people. I took that top speed and geared my bike to nearly hit that rev-limit by the time I hit the end of the straight. Throughout the rest of the track I'll be in 3rd, right in the power band.

Also, if you haven't already, do ND4's fork mod... You'll thank me later- forget that stabilizer and the clunky K-tech stuff.


 

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You run EFIE and Finbro ECM? Wouldn't Finbro ECM just be enough?
Finbro Targets 13.5(or so I understand) which might be fine for someone with lower compression, but with 12.2:1, I've offset the voltage to put me closer to 12.5. Higher compression obviously risks detonation from all the extra heat, so the cooler I can keep the cylinder with a little extra fuel, the better. Not to mention, I'm still running stock oil pump with no oil cooler so I prefer to run a little fat.
 

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i never installed it. I need to lift the front as well and I'm hesitant about the fork mod. the issue i have with the fork mod is the fact that i will bottom out sooner and i need all the travel i can get out of that front shock don't need it bottoming out even sooner than it already does lol. No point in installing it on the rear only it would change the geometry and i don't think in a good way, you'd be asking way to much of the front end.

I just plan on selling my current suspension set up to a friend and going the K-tech route. great suspension and it lifts the bike up a bit front and rear.
I'm going to do the fork mod and install mine this winter..cant justify ktech money besides my grom is on rails just needs alittle bit more ground clearance
 

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2015 Grom (Street & Track)
Protaper KLX110 Bars
Kitaco quick turn throttle tube
Ohlins fork cartridges
Ohlins fully adjustable rear shock
Mita Softs
Spiegler Front/Rear brake lines
Mtake
2 Brothers Exhaust
Stock Gearing (Aluminum rear sprocket)
Nology Ignition
Shorty Levers
Finbro ECU
PCX Injector


Gearing had to stay stock to race in the grom class but since I missed the last 2 rounds I decided screw it and just start modding but still keeping it 125cc as there are still a lot of races I can do. So on that note I just added the finbro ecu and pcx injector and have a list of other mods to do! So all those lurkers that are watching what I do, don't bother u still aint gonna catch me, lmao :toothy9:
 

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Discussion Starter #17 (Edited)
Hmm thats interesting with the 13/43 ill have to give it a try. I have mine geared to where i stay in 2nd and 3rd the entire track basically. Not sure what track your on but heres some footage. Honestly i love the way my bike handles right now its dialed in pretty good so any suspension adjusts i do will be later on down the road.



 

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We have tried k-Tech Ohlins and racing bros front and rear, with K-tech being more expensive and having adjustability you would think it would perform better but we personally didn't like it and went back with Ohlins. Ohlins just works, drop them in and hit the track no need to fine tune as long as you select the proper springs to best suit your weight. Racing bros are also pretty good and it comes fully adjustable if you are looking to spend the extra time fine tuning the front end.
 

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Hmm thats interesting with the 13/43 ill have to give it a try. I have mine geared to where i stay in 2nd and 3rd the entire track basically. Not sure what track your on but heres some footage of mine and a few pics. Honestly i love the way my bike handles right now its dialed in pretty good so any suspension adjusts i do will be later on down the road.
Do you know the top speed people tend to run at your track? I keep a little hand book that I've written all my possible gearing with MPH at rev-limit(9200), so I can tell you right away what would be ideal to stay between 3rd and 4th.

That photo was taken at Pittsburgh International Race Complex on the Wilson karting track. That corner is REALLY a mind bender because it's got a grade that's quite a bit lower on the outside so leaning into the apex too much can make you lowside real quick.

Here's a different perspective that still doesn't show all too well, but you get the idea.
 
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