Alright I decided to make a Build thread for my grom.
Main Objective: Function Over Form
Main Use: An around town / camping / small trail bike
Backstory:
When the grom first came out i knew i wanted one so it was only a matter of time. A little before xmas 2015 I had been watching this used grom local to me drop in price and when he finally dropped to 3k for the 2014 grom w/ 3800 miles i jumped on it. (Groms down here in so cal go for a pretty penny). It came with a hot bodies fender eliminator / integrated turn signals, chimera intake / K n N filter, and Full Yosh RS9. It also came with ALL of the stock parts (airbox, exhaust, rear fender, etc) as well as the fuel pump recall done and TONS of maintenance logs, the previous owner did a good job.
The Build
I rode it around for a bit and quickly realized a few things. No fender SUCKED for the riding I did in the dirt / mud, Also the yosh rs9... while nice, was WAY to bloody loud for my likes. Very quickly i popped the stock rear fender back on, as well as the stock exhaust. OH so much better, i could hear myself think while riding it and not get dirt / mud / water sprayed all over my back when doing so.
Then The mod bug hit.... I couldnt care less about how it looks, everything i have done is to increase functionality in some way.... eff fancy flashy stuff, lowering kits, bar end mirrors etc etc. My build is all about bring better performance / functionality in a 100% reliable package that i didnt have to worry about tuning / dealing with different tunes.... i want it to just work. I have been through a few phases of this build but I am at what i like to call my "final product" So here are the list of things done to her.
Engine:
Non Engine Rleated
Overall I am SUPER happy with the power and ride now. Its turn key go, no dealing with a pcv / bazzaz for tunes, just let the finbro ecu do its thing. It makes GREAT power, i can now cruise at 55-60mph and still have throttle left to grab, but also have power down low for bigger slower speed hill climbs in the dirt. I gained ground clearance with the header and fork mod, and traction with the dual sport tires. I cant wait to put some miles on her now as of writing this it has maybe 100 miles on the bbk, but i have been mean and broken it in like a red headed step child.
Questions / Comments, feel free to ask!
Edit - 12.11.16 - Changed cam chain tensioner to finbro upgraded unit, Changed to kitaco type 2 cam with a stock decomp mechanism.
Edit - 11.22.17 - Upgraded head!
Alright, so i FINALLY got her all together like i should have the first time. That is with a bigger valved head. I went with the finbro superhead (27/23mm valve) from franco for 250 bucks. Had i known i could of gotten the 28/24mm valve head from monkey father for 270 bucks... i would of gone that route. But i am happy with the results of the superhead (that definietly needed some work - see here http://www.hondagrom.net/forums/7-grom-talk/35866-finbro-superhead-quality-meh.html) as well as some throttle body and intake manifold work to port match everything (see here- http://www.hondagrom.net/forums/7-grom-talk/36018-throttle-body-mod.html)
She is finally properly rev happy and doesnt fall on her face at 7k rpms like before with the tiny valve n port stock head. I had to get headgaskets from webike directly, 30 bucks for 2 of them shipped which wasnt bad. Upon disassembly i cleaned up the top of the piston / combustion chamber and top of the head and quickly remembered why i was happy with the kitaco bbk. Damn the machining on the piston and top deck of the cylinder are beautiful. Overall with the smoothing of the combustion chamber dropping compression a smidge (something i actually wanted) and more flow through the head, it runs cooler and stronger! All win win win.
Edit - 12.08.17
Decided i wanted more clutch grip, so a billet clutch plate, 6 much stiffer finbro springs, and tapped the other 3 standoffs for a 6 bolt clutch setup - check it -> http://www.hondagrom.net/forums/7-grom-talk/36505-nd4-s-bulletproof-clutch-mod.html#post402441
Main Objective: Function Over Form
Main Use: An around town / camping / small trail bike
Backstory:
When the grom first came out i knew i wanted one so it was only a matter of time. A little before xmas 2015 I had been watching this used grom local to me drop in price and when he finally dropped to 3k for the 2014 grom w/ 3800 miles i jumped on it. (Groms down here in so cal go for a pretty penny). It came with a hot bodies fender eliminator / integrated turn signals, chimera intake / K n N filter, and Full Yosh RS9. It also came with ALL of the stock parts (airbox, exhaust, rear fender, etc) as well as the fuel pump recall done and TONS of maintenance logs, the previous owner did a good job.
The Build
I rode it around for a bit and quickly realized a few things. No fender SUCKED for the riding I did in the dirt / mud, Also the yosh rs9... while nice, was WAY to bloody loud for my likes. Very quickly i popped the stock rear fender back on, as well as the stock exhaust. OH so much better, i could hear myself think while riding it and not get dirt / mud / water sprayed all over my back when doing so.
Then The mod bug hit.... I couldnt care less about how it looks, everything i have done is to increase functionality in some way.... eff fancy flashy stuff, lowering kits, bar end mirrors etc etc. My build is all about bring better performance / functionality in a 100% reliable package that i didnt have to worry about tuning / dealing with different tunes.... i want it to just work. I have been through a few phases of this build but I am at what i like to call my "final product" So here are the list of things done to her.
Engine:
- Non BBK Related
- http://www.hondagrom.net/forums/13-grom-performance/10658-gave-my-oil-spinner-diet.html (1.3lbs machined off the oil spinner)
- Upgraded clutch springs to EBC springs (during which i replaced wear parts like the throw out bearing, thrust washer and clutch collar)
- Got rid of the shitty KnN filter for a much better UNI pod filter on the chimera intake
-
- Removed EVAP canister
- Cooler spark plug
- BBK TIME!
- Kitaco 164cc BBK (chose this as much bigger than 60mm bore you get into possible headgasket issues... remember reliability is HUGE for me)
- Finbro ECU with my http://www.hondagrom.net/forums/49-grom-how-s-guides/10482-finbro-cold-starting-fix.html
- Finbro 6 Hole injector (CBR150R injector)
- Custom nylon cam chain tensioner button (a nylon bolt filed down to the right size) - Now been replaced with a finbro nylon button because it was sent with my CCT
- Kitaco type 1 cam (chose this because it was going to produce more power in the low to mid range vs high end which is better for my uses) - Now been replaced with a Kitaco Type 2 cam with stock decomp moved over
- Finbro Upgraded stiffer valve springs
- A big 5 row oil cooler from ebay Mounted from the frame with custom brackets i made (This is one of the biggest i have seen fitted to a grom, and it also has a nice plastic guard so it doesnt get punctured)
-
- A DG header to get rid of the stock real restrictive header, BUT keep the stock exhaust can to keep it quiet!
-
Non Engine Rleated
- Upgraded to 55/60watt headlight bulb
- 15/37 sprockets and chain for more giddyup - Changed to 16/37 for better around town cruising speeds
- Kenda K761 dual sport tires
- Upgraded front forks with my fork mod http://www.hondagrom.net/forums/49-...-fork-upgrade-mod-15-bucks-worlds-better.html
- Added a rear rack (IMPACT : Custom Rear Carrier [IM-GR-022B]) Which if i do say so ties in with the stock fender very well
Overall I am SUPER happy with the power and ride now. Its turn key go, no dealing with a pcv / bazzaz for tunes, just let the finbro ecu do its thing. It makes GREAT power, i can now cruise at 55-60mph and still have throttle left to grab, but also have power down low for bigger slower speed hill climbs in the dirt. I gained ground clearance with the header and fork mod, and traction with the dual sport tires. I cant wait to put some miles on her now as of writing this it has maybe 100 miles on the bbk, but i have been mean and broken it in like a red headed step child.
Questions / Comments, feel free to ask!
Edit - 12.11.16 - Changed cam chain tensioner to finbro upgraded unit, Changed to kitaco type 2 cam with a stock decomp mechanism.
Edit - 11.22.17 - Upgraded head!
Alright, so i FINALLY got her all together like i should have the first time. That is with a bigger valved head. I went with the finbro superhead (27/23mm valve) from franco for 250 bucks. Had i known i could of gotten the 28/24mm valve head from monkey father for 270 bucks... i would of gone that route. But i am happy with the results of the superhead (that definietly needed some work - see here http://www.hondagrom.net/forums/7-grom-talk/35866-finbro-superhead-quality-meh.html) as well as some throttle body and intake manifold work to port match everything (see here- http://www.hondagrom.net/forums/7-grom-talk/36018-throttle-body-mod.html)
She is finally properly rev happy and doesnt fall on her face at 7k rpms like before with the tiny valve n port stock head. I had to get headgaskets from webike directly, 30 bucks for 2 of them shipped which wasnt bad. Upon disassembly i cleaned up the top of the piston / combustion chamber and top of the head and quickly remembered why i was happy with the kitaco bbk. Damn the machining on the piston and top deck of the cylinder are beautiful. Overall with the smoothing of the combustion chamber dropping compression a smidge (something i actually wanted) and more flow through the head, it runs cooler and stronger! All win win win.
Edit - 12.08.17
Decided i wanted more clutch grip, so a billet clutch plate, 6 much stiffer finbro springs, and tapped the other 3 standoffs for a 6 bolt clutch setup - check it -> http://www.hondagrom.net/forums/7-grom-talk/36505-nd4-s-bulletproof-clutch-mod.html#post402441
. i will come back with some question.
