2012 Suzuki King Quad 750 sputtering in L gear

[Thortobe]

Hi to everyone!

I have problem with my 2012 KQ 750 axi

So the problem is that everytime when go to the L gear 4wd, atv starts to sputter, like seen on this video

 

 

This problem does not happen when in H gear 4wd or 2wd

So, tried the same eliminate the 15-th pin (red-green wire) and…it did, works only when atv is riding on dry conditions.

Took the pin out of the socket, did not cut it.

Today went to drive in swamp and when i used L or R gear it sputters and the only way to drive is to use override button.

So, i`m pretty sure that the problem is moisture/water but where is the specific wire or connection?!?! Some guys have told that voltage regulator near gas tank might be the problem, some have said that buy a new sparkplug wire and so on…

Has anybody ideas where to start looking?

Thanks for thinking with me!

[Ajmboy]

Isn't that by design so that you don't over rev in low or reverse?

[Thortobe]

Yes it is, but my problem is not rev limiter but sputtering, like it's not getting fuel or something. But i'm pretty sure as i sayd before problem lays somewhere in electrcity system, moisture/water is making this sputtering happen.

[zx11dms]

On 11/15/2021 at 2:07 PM, Thortobe said:

Yes it is, but my problem is not rev limiter but sputtering, like it's not getting fuel or something. But i'm pretty sure as i sayd before problem lays somewhere in electrcity system, moisture/water is making this sputtering happen.

Did you ever find a solution to this problem as my machine is doing the same thing? The only difference I'm having that you didn't list, is when the problem starts, it doesn't indicate it's in low range on the guage cluster.

[Thortobe]

On 5/7/2023 at 6:49 PM, zx11dms said:

Did you ever find a solution to this problem as my machine is doing the same thing? The only difference I'm having that you didn't list, is when the problem starts, it doesn't indicate it's in low range on the guage cluster.

Hi.

Yup, found a solution.

My Suzuki is 2012 KQ 750 axi. So with help from a friend who knows these machines better than his own five fingers, we had a chat and told me to change gear lever position sensor.
So, went to this site https://www.partzilla.com/catalog/suzuki/atv/2012/kingquad-lt-a750xpzl2/gear-shifting and picked the right year and engine and under gear shifting ordered new OEM part number 29 and that fixed the problem.

Also, had the same problem that when in L gear it did not show in the gauge cluster. 
One thing what i noticed is that the problem occured only after when engine had reached it`s working temperature and fan had kicked on for atleast once. Before that, everything worked fine.

Now it has been over a year after changing the position sensor and everything works like a charm!

 

Sensor is located on the right side of engine, between exhaust and engine, outside.

Attached picture below, red circle shows the location.

For changing, loosen or take off exhaust, otherwise you have very minimal and tight space. It is dooable without looseing the exhaust, but belive me its very challenging.

 

All the best and let me know if it worked for you!

 

 

Martin

Edited May 9, 2023 by Thortobe

[Mech]

Good one Martin.

Thanks for that.

[zx11dms]

Awesome my man thank you so much! That's exactly what mine is doing. I'll let you know how it turns out.