RM 125 Big Bore 144 EG + Lectron HV update

Lightning78
Profile picture for user Lightning78
Posts
6314
Joined
12/12/2007
Location
Huntington Beach, CA US
Lightning78 3/8/2018 9:08pm
3/8/2018 9:08pm
I remember no matter how manytime i bled my front brake on my 06 RM250 which was still like new, the front brak was absolute "muff cabbage " (southpark reference lol) compared to all thr other japanese brands from that era those fron brakes which had a steel braided line and by then 2 years into oem cr style routing they were absolutely shit front brakes stock...it really made for a frustrating ride at times....looks like im not alone
Dusin791
Profile picture for user Dusin791
Posts
40
Joined
7/31/2017
Location
Templeton, CA US
Dusin791 3/12/2018 9:57pm
3/12/2018 9:57pm
I put the lectron on my 07 RM125. Probably the best investment on the whole bike. Easy to tune and only had to make slight adjustments and it runs like a champ. Not to mention the amount of fuel it saves. Especially running race fuel it’s a definite plus. Well worth the money!
Jrewing
Profile picture for user Jrewing
Posts
2865
Joined
1/4/2014
Location
AU
Jrewing 3/14/2018 2:43am
3/14/2018 2:43am
Dusin791 wrote:
I put the lectron on my 07 RM125. Probably the best investment on the whole bike. Easy to tune and only had to make slight adjustments...
I put the lectron on my 07 RM125. Probably the best investment on the whole bike. Easy to tune and only had to make slight adjustments and it runs like a champ. Not to mention the amount of fuel it saves. Especially running race fuel it’s a definite plus. Well worth the money!
This post convinced me to get one instead of the pwk on my cr139. Improved mileage on race gas will pay itself off!
yz763
Profile picture for user yz763
Posts
769
Joined
2/6/2009
Location
Altamonte Springs, FL US
yz763 3/14/2018 6:27pm
3/14/2018 6:27pm
I have about 1 hour on my Lectron and fresh Tom Morgan YZ295. The Lectron is one of the best mods I have done to the beast. Crisp, smooth and it really does save a considerable amount on fuel.

The Shop

See All »
make1go
Profile picture for user make1go
Posts
905
Joined
2/3/2018
Location
BF
make1go 3/21/2018 3:36am
3/21/2018 3:36am
yz763 wrote:
I have about 1 hour on my Lectron and fresh Tom Morgan YZ295. The Lectron is one of the best mods I have done to the...
I have about 1 hour on my Lectron and fresh Tom Morgan YZ295. The Lectron is one of the best mods I have done to the beast. Crisp, smooth and it really does save a considerable amount on fuel.
what i dont understand is how are mikuni and kehin so far behind?

sasnik
Profile picture for user sasnik
Posts
1
Joined
8/13/2018
Location
EE
sasnik 8/13/2018 2:39pm
8/13/2018 2:39pm
Vega#15 wrote:
Crankcase mods ready for the "big" piston :laugh: B) [img]https://up.picr.de/27952252lt.jpg[/img] [img]https://up.picr.de/27952253rp.jpg[/img]
Crankcase mods ready for the "big" piston LaughingCool




Hi! I have 2008 RM125, cylinder blew up couple of days ago and I'm thinking about to perform big bore too! But as a newbie I don't know what additional mods are needed to do this right. Did you also tuned the cylinder head and power valves to fit big piston?

Heres my RM125 Smile


Thanks in advance!

CARLOS_ABRAHAM188 8/14/2018 12:47pm
8/14/2018 12:47pm
hey whats up
would you like to share an opinion on the anodized forks? have they hold up nice or scraped fast??
they look nicee!!!!!!
Ozzyrules
Profile picture for user Ozzyrules
Posts
39
Joined
1/6/2017
Location
Mandeville, LA US
Ozzyrules 8/15/2018 1:28pm
8/15/2018 1:28pm
Here's my Eric Gorr big bore 155. Ya gotta cut the side plates properly:

2
aaronc70
Profile picture for user aaronc70
Posts
3
Joined
9/10/2019
Location
Knoxville, TN US
aaronc70 9/10/2019 9:36am
9/10/2019 9:36am
Ozzyrules wrote:
Here's my Eric Gorr big bore 155. Ya gotta cut the side plates properly: [img]https://p.vitalmx.com/photos/forums/2018/08/15/280846/s1200_thumb_IMG_2956_1024.jpg[/img]
Here's my Eric Gorr big bore 155. Ya gotta cut the side plates properly:

I've got an EG 144 mod on my 'o3 RM125 and love it. What is the 155? Is it just a bigger bore or a stroker crank as well?
Ozzyrules
Profile picture for user Ozzyrules
Posts
39
Joined
1/6/2017
Location
Mandeville, LA US
Ozzyrules 9/11/2019 4:55pm
9/11/2019 4:55pm
It's actually a 144 bore with a stroker kit, which makes it equivalent to a 155. Probably a pretty poor explanation. I'm sure somebody here can explain it better....
aaronc70
Profile picture for user aaronc70
Posts
3
Joined
9/10/2019
Location
Knoxville, TN US
aaronc70 9/11/2019 5:51pm
9/11/2019 5:51pm
Ozzyrules wrote:
It's actually a 144 bore with a stroker kit, which makes it equivalent to a 155. Probably a pretty poor explanation. I'm sure somebody here can...
It's actually a 144 bore with a stroker kit, which makes it equivalent to a 155. Probably a pretty poor explanation. I'm sure somebody here can explain it better....


I've been wondering if anybody does a stroker kit for the RM125. So you got your stroker cranks from Eric Gore as well? I'd love to know how that compares to just the 144 like mine. I really like my bike, a touch more torque certainly wouldn't hurt it though.
Here's my RM144.
Ozzyrules
Profile picture for user Ozzyrules
Posts
39
Joined
1/6/2017
Location
Mandeville, LA US
Ozzyrules 9/12/2019 4:05am
9/12/2019 4:05am
Eric Gorr does the whole conversion. My buddy has an '07 144. I feel like it pulls slightly better than my 155, but our gearing is a bit different,and he has V Force reeds, I don't. That could make a difference.
aaronc70
Profile picture for user aaronc70
Posts
3
Joined
9/10/2019
Location
Knoxville, TN US
aaronc70 9/12/2019 7:31am
9/12/2019 7:31am
Ozzyrules wrote:
Eric Gorr does the whole conversion. My buddy has an '07 144. I feel like it pulls slightly better than my 155, but our gearing is...
Eric Gorr does the whole conversion. My buddy has an '07 144. I feel like it pulls slightly better than my 155, but our gearing is a bit different,and he has V Force reeds, I don't. That could make a difference.
Hmm, well gearing may have something to do with it, but it probably also depends on the porting done to each of your cylinders. I was told mine was the "low-mid" porting. Maybe your buddy's is ported for better low-end performance?

I might have to email Eric Gore and see if anything else can be done to my bike to make the engine more "KTM 200-ish" (my favorite motor of all time).

I also wonder if a Lectron Carb properly set up would make a difference?
Ozzyrules
Profile picture for user Ozzyrules
Posts
39
Joined
1/6/2017
Location
Mandeville, LA US
Ozzyrules 9/12/2019 7:52am
9/12/2019 7:52am
Good point. If I recall, EG offers 3 different power packages which you somewhat described. Good luck!

Pit Row

See All »

Post a reply to: RM 125 Big Bore 144 EG + Lectron HV update