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2010 750 questions about it?

jrfonte2010-08-10 21:56:35 +0000 #1
ive got a 10' 750 and when going slow when steady on the throttle it makes a clacking sound from what sounds like the tranny almost like the gears have to much slack in them like there not meshed or shimmed right. anyone else hear this in theres?

also i removed some of the insides of the stock exhaust and the intake metal screen and it backfires through the throttle bodies and exhaust now does the ecu not compensate enough for just a little added air flow to the engine since i assume it is a little lean now.

the bike has 74 miles and about 15 hours on it no mud just trails and roads.
bruterider272010-08-10 21:58:18 +0000 #2
Iv Hurd it in mine I don't hear it as much maybe I got used to it Idk but I haven't had a problem and I got 340 something miles on it
Medic_Up2010-08-10 22:08:14 +0000 #3
Mine did the same thing thru the throttle bodies I put a HMF on it and it dosent do it now... Mine had a ticking sound coming from the belt exhaust I've snorkled it and the sound is gone, not really sure what it was.. I've noticed if I run a good speed then slow down real hard my cvt squeals.. Hope this helps
nmkawierider2010-08-10 22:33:45 +0000 #4
With it off, put it in low or reverse, then rock the bike back and forth just enough to hear the sound. That sound is usualy the beavel gear (and a little ring/pinion) and its usualy set to have some play in it. Why.. I do not know, but all of them do. Other clicking while moving can also be because the coggs are coming off of the belt. Kinda sounds like a stick beating the inside of the clutch cover. Been through that twice.

I don't think they use an O2 sencer so the only way to change maping or make up for over-leaning is to re-map the unit...except...the stock controler isn't re-programable as far as I know.
jrfonte2010-08-10 22:21:54 +0000 #5
yea it makes the noise when in gear and rocking it, also when youve got the rear brake locked and rock it the rear end makes a similar noise. it seems like it was there when i first got it but since its got a few miles on it its gotten a little louder.

but i know its not the belt i just changed the springs in the clutches this past weekend and the belt had no signs of wear at all on it.

yea i noticed they didnt have an O2 sensor on the exhaust anywhere sems like there would be one there since its fuel injected. does any of the programmers use an O2 sensor to help keep the engine running in the right afr. ive got an afr gauge and sensor that i used on my 07 500 foreman when i rebuilt the engine to get the carb set right. it wouldnt be a problem to weld a bung on the exhaust to install it on the 750 to make it easier to get the afr correct using a controller. do the programmers and controllers let you change each cylinders fuel individualy or are they both controlled the same, just curious because i always see that the carbed models always use different jets for the front and rear cylinders.
nmkawierider2010-08-10 22:32:26 +0000 #6
Quote:

Originally Posted by jrfonte

do the programmers and controllers let you change each cylinders fuel individualy or are they both controlled the same, just curious because i always see that the carbed models always use different jets for the front and rear cylinders.

Now that's a good question. I am not sure. I do know some can up-load different maps and some have some adjustments or limit controls, but do they control injector pulse width individualy...Hmmm...we need a techie guy to chime-in here I think. And with the new exhausts do they need to be different anymore...too many questions for a Sunday morning...lol
bruterider272010-08-10 22:48:17 +0000 #7
PCV has the choice to run maps or get a o2 sensor and run auto tune

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