DHM 149cc BBK Dyno Run on the 2022 Honda Grom!

Man, I've been promising this for months but finally have it well-broken in and on the dyno and damn, I was surprised how much more power I got out of 10cc! This DHM big bore kit is the best on the market for the 2022+ Honda Grom.
Check out ‪@Chazileezy‬ and ‪@lexdfox‬
Lexdfox’s run: • How much Horsepower do...
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#dhm #eastcoastish #bbk

[@nickmiller1412]

Thanks for showing us around the shop. The bikes are insane!!

[@reidspeed77]

16.9 woe,amazing,so 20hp is available whith mills in valves,..alloy rockers ect,the quest continues .. The GRF110 IS BONKERS 🔥

[@carnivorecave]

The Numbers look good...

[@denttime]

I heard he doesn’t have a dyno anymore?

[@Longjohn250]

Looks nice, but how is it after 5000 miles ?

[@motorcityrc6009]

Simmer down hater man!!

[@RamiroJunTV]

Where is the fan for the dyno ?

[@PharaohKoup]

I tried 2 degrees on mine and I couldn't keep the bike running. I am not through the break in period yet though. I also think I am running a slightly colder plug than I should be. Can you link the plug you are running?

[@eastcoastish]

I’m running the c9re, where are you retarding the timing? I’m only pulling that 2 degrees at 100% throttle, so it shouldn’t have any impact on running other than at wot.

[@PharaohKoup]

@@eastcoastish I think DHM had some being pulled on the setup sheet across all ranges. I’ll try again at WOT only and see how it does

[@888jackflash]

What was the long-term result of this build? Did it prove reliable?

[@eastcoastish]

Still running this setup and it has been solid for me. Lots of short rides and a few 100+ mile rides and running strong.

[@PrelandRanger]

What bottom fairing is that? I’ve been looking for one for my 24 grom

[@ReeceCoza]

just bought the monkeyfathers all inclusive 149 bbl, Mate has one on his and oh boy its a huge difference, monkey fathers managed to dyne nearly 18hp with bbk, head and all the other goodies, apparently they'll be releasing a 4v head very soon that'l allow the 2022 to hit the 20hp mark!

[@Kawaihonda]

monkey father makes the kit for dhm fyi

[@ReeceCoza]

@@Kawaihonda makes sense!

[@DWBmotorsports]

@@Kawaihonda monkey fathers is grom fathers?

[@Kawaihonda]

@@DWBmotorsports no monkey father is different person

[@DWBmotorsports]

@@Kawaihonda thank god

[@NiNWAVE]

Is it still running strong? I'm thinking of the tbparts bbk for my grom as even with my cam (thats supposedly 13-14 hp top end with minor loss in low-mid but idk if it really makes that much) I'm starting to get used to the power and being able to hold over 60-65 would be nice but idk if I wanna sacrifice any reliability for those few extra horses and torque. Also would an oil cooler be necessary, I live in a pretty cold/wet climate, normally 30-50 in the winter and maybe a few days reach 75-85 in the summer and ive heard mixed results when it comes to need for an oil cooler

[@eastcoastish]

Still running strong 💪

[@mikeleone1805]

Great running bike ! How did you go about breaking this kit in ? I have same set up as you and 149cc bbk - the ported head and aracer5. I have the ecu flash from dhm and my piston burned up like your 140 bbk did . Can you help me out ? Did you use break in oil ? My kit lasted 250 miles ! One speed test and it burned up ! Thanks

[@eastcoastish]

What do you mean you have ECU flash and aRacer? It’s one or the other… no special break in process, make sure you gap the rings, mine were way too tight and likely would have failed if I didn’t file down. Vary the RPM range for the first 20 miles or so, don’t just sit in a single rpm range. More than anything, watch temps. Anything over 240f is too hot.

[@mikeleone1805]

just ecu flash no aracer. I know my gaps were right Im a machisnt. Where is the best place to check your temp? Please post any problems with your build . thanks Mike

[@SSS-mp8th]

@ Mike Leone Are you running an oil cooler? DHM says you should and also suggests a crankcase breather.

[@eastcoastish]

@@SSS-mp8th yes on the cooler, no on the breather kzbin.info/www/bejne/aXPMenSZrqiHhrs

[@SSS-mp8th]

@@eastcoastish Yep that question was for Mike; without an oil cooler I can see his overheating so I wanted to ask. I'm thinking of doing the DHM kit myself.

[@miniman1448]

I saw your original video of the dyno numbers with just the bolt on parts and from what i remember you were making like 13.5 to 14hp on stock bore. What made you go with the dhm 149 oposed to porting the stock head and keeping the reliability of 125 bore ?

[@denttime]

Yeah, lately hasn’t been replying to peoples messages or comments. I’d like to know the answer to this question as well.

[@theflyerpr40d]

Have you tried other BBK? 181cc, 186cc what do you think? Also have you ridden a swapped engine 250-300cc Thanks.

[@eastcoastish]

149cc is the biggest for the 2022+ Grom right now. I have the Takegawa 181cc on my 2019 Monkey, which only makes a bit more power over all. I’ve ridden a few 250cc Groms, lots of power but takes the fun out of a bike that size in my opinion.

[@TheMoghrabimahmoud]

Bro if u really wanna have some fun building groms,get yourself an OG or an SF. Way more aftermarket support.

[@Bloco1984]

Do you still run the 149bbk as a daily. I’m about to get a takegawa kit. The dhm kit I have nothing but detonation and rising oil temps at higher rpms.. I have all supporting mods and the aracer /af2 running the quick burn on auto tune with 93 octane gas.. do you have any recommendations? With your experience what kit do you feel is most reliable to just jump in and go?

[@denttime]

If you’re really concerned about reliability, do not get a BBK. It just makes your engine run much hotter and you’re going to need an oil cooler for sure. Anytime you modify the stock motor, it will increase your chances of not being as reliable as stock. It’s just a simple trade-off. I am currently running a stage two and I’m pretty happy with it. However, I’m greedy. I will go with the DHM version 2 149 CC kit.

[@Jdubsgarage74]

Was the ported head also on the 139cc bbk? Just curious for the sake of increase in numbers.

[@eastcoastish]

Yes, Bbk was only change in those runs.

[@claytonmorrison836]

Im have the same issue with the same head studd not tighten all the way down and its cause it to leak oil

[@eastcoastish]

Do you have the stock or aluminum ones? The aluminum looks cool but after what happened I wouldn’t recommend it. If all 4 aren’t torqued down (I think 18 ftlbs) it could blow the head gasket.

[@bodiddly1337]

Are the leaks only with aluminum studs? What does the kit come with?

[@Bill-mw5ip]

What cam do you have? Not sure if I should go with s1 or s2 just got aracer

[@eastcoastish]

I have the s1

[@Bill-mw5ip]

@@eastcoastish would the s2 be better for this set up ?

[@eastcoastish]

@@Bill-mw5ip I bet I could make some more top end power if I dropped in the s2, but I want this bike to be an all around rideable and reliable bike. The s1 is nice power throughout the band and that hp power curve is gorgeous 😍

[@Bill-mw5ip]

@@eastcoastish thanks man gonna order the s1 and 149 kit now

[@bosco008]

@ 1:10 mark. Is that a harbor freight hitch carrier?

[@eastcoastish]

Yeh, it’s been great for hauling minis. I’ve got thousands of miles on mine. And ProTaper straps is where it’s at.

[@bosco008]

@@eastcoastish Dude. You are amazing to reply so fast. You use it for the Monkey as well? No concerns? Mine scares me. 😀

[@bosco008]

@@eastcoastish Anyway I can back channel you for a few details?

[@eastcoastish]

@@bosco008 yeh I’ve used it for all my minis (I take the a monkey to the track a couple times a month 200 miles round trip). Just get good straps 😁

[@eastcoastish]

@@bosco008 dm on IG

[@poisondragon5670]

Should let the dude that owns the bike sit on it and throttle it while you check stats

[@robinspalding3]

what starter motor are you running. ?

[@eastcoastish]

Stock, no problem turning this small Bbk.

[@jackrabbit7389]

That’s odd that it liked less timing huh 🤔

[@pauldapra]

it looks like those dhm 149cc are not so good because many riders report that those leaking

[@eastcoastish]

The leak wasn’t from the Bbk, it was from the aluminum nuts I was using. Totally my fault for putting form over function.

[@marcosagosti6175]

I don't get it. Total amount invested over the original is over $1,500$ for +7 hp. The original is $3,500 + $1,500 = $5,000 for 17 hp. Net, too much effort and money just to get a mini bike to do +10 mph. Probably better to get a used bike for those $5,000. I saw a nice 2012 super tenere, 2010 VMax and newer smaller bikes for that money.

[@eastcoastish]

Haha, if this offends you, you probably shouldn’t look at some of my other builds on this channel, let alone the ones I have planned 😅

[@marcosagosti6175]

@@eastcoastish Go for it!

[@AndrasMihalyi]

Look at it this way: +7HP is + 70%... Try adding +70% HP to the VMax for 1500$ 😁

[@DWBmotorsports]

You clearly have not and ounce of sense bro. They nearly doubled the power of the stock engine….. untill you’ve ridden a 15+ horsepower grom/monkey I don’t think you should compare them to bikes with 10x the displacement

[@nickkolczynskitattoo4865]

Missing the whole point of having fun with minis wow 🤩