13 replies to this topic

[RoostnRev TT Member]

I have it running stock mapping right now with no coupler, any body have any experience with switching these couplers around and have one work better? which ones did what or made what type of difference ? all input on this would be appriciated thank you

[thor09 TT Newbie]

I'm wondering the same but for my 2011

[AS64 TT Bronze Member]

I am also wondering the same but for my 2012..

[RoostnRev TT Member]

Well hopfully somone will answer us for our 2010 2011 and 2012 bikes and we dont have to be left in the dark! haahha

[mog Get Help Now]

Most people with a pipe have to run the rich coupler,  with a std pipe the rich coupler makes it smoother and less of a hit

[dirtbikersa TT Silver Member]

Just try each one and see which one you like best...

[ontherev164 TT Bronze Member]

i ran the stock, but went to the dark coupler, found it really smooth and here im at sea level so it helped a bit there. also i belive the dark coupler assits on over rev i heard?

[funkinalive TT Silver Member]

ontherev164, on 09 April 2012 - 11:13 AM, said:

i ran the stock, but went to the dark coupler, found it really smooth and here im at sea level so it helped a bit there. also i belive the dark coupler assits on over rev i heard?

exactly my experienced, it took me a while to find the time to try the different couplers but the rich (dark) coupler works best for me, it calms down the bark off bottom. i dont know about top end though. i think you just get that sensation since the bottom doesnt pull so hard so it magnifies the top ends power as you move into it.

[Eric_mx TT Bronze Member]

I run the dark coupler with a full yoshimura RS-4 exhaust system, no complaints!

Edited by Eric_mx, 12 April 2012 - 07:09 AM.

[RoostnRev TT Member]

WOW! thankyou everbody i switched to the richer coupler it feels like a whole different bike, before with the stock coupler on my track i would get a little before the apex of a loamy  turn punch the throttle full and the bike would take a little while before the rpms caught up with the throttle response, now when i punch it wide open in the middle of my loamy turns the rpms are there instantly with no build up what so ever its amazing and the top end pulls much harder, any one thinking about doing this try it made a world difference on my bike! now just waiting on my exhaust system to come in ! then ill really be rippin hole shots at the races every moto! whoo!

Edited by Btsuzuki2, 19 June 2012 - 12:23 PM.

[AS64 TT Bronze Member]

Alright I guess I shall give my insight. I had the original stock coupler in since new on my 2012, liked the power curve, but wasn't bedazzled. Then I recently purchased a Moto Tassinari Air4orce intake boot, and opted to go with the "short" stack to install in it for mid-top power. And I also purchased a FMF 4.1 RCT Muffler and a Powerbomb header, I went with the powerbomb because it is a mid-top header unlike the megabomb. So all in all I was expecting this to be a better top end bike. Before even riding it I put in the Rich coupler (gray). Once I got out to try it I was a bit shocked. The power was definitely better, but I hated the power curve. It felt like a tractor, which for some people that might be great. But I hated it. So then I went back to the normal coupler. It was improved, I felt more hit up top. Then I went to the Lean (white) coupler and fell in love with it. The hit was excellent up top and definitely complimented the upgrades I installed. So what I'm suggesting is try them all and see what works best for you. If you like a hard hit up top and haven't tried the lean, go and try it. Just my $.02. It sounds like I might be the only one that doesn't like the rich coupler with a pipe installed.

Edited by AS64, 02 August 2012 - 05:51 PM.

[Price21 TT Newbie]

I agree with the guy above. My 2012 rmz 250 with hindle full pipe, and some other parts liked the white lean plug. Was very different with the grey and not good for my riding style

[Thumpythumperton TT Member]

I like the lean (white) coupler. My bike is a 13 with full Yosh RS4 and backfire screen removed.  

The lean coupler seemed to pep up the power band. It also helped my cornering by allowing me to spin the rear wheel at the apex of the turn (steering with the rear-end, as they say), which helped me with corner exit speed.

As the above posters have said; try em all and decide which works best for you.

[upnorthbacon TT Bronze Member]

I played with mine on my 2013 the other day, but I ride woods.  I felt like the rich plug slowed the revs down and almost felt like extra flywheel weight.  The lean plug definately gave crisper throttle response and seemed jumpier off idle.  I liked everything about the lean plug except it seemed to flame out in the tight stuff more, when I switched back to the stock plug I didn't have any problems stalling.  Also the lean plug seemed like it took two kicks sometimes and I found it started without the hot start.  The stock plug always starts on one kick with the hotstart.  For the woods I'll likely stick with the stock plug, maybe even the rich plug if it's really slippery.