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Discussion Starter · #1 · (Edited)
Alright guys, im about at my wits end with this.

When i first got my 2008 700xx (used from original owner), it would fire up instantly. it was also completely stock.

Now that ive had it for about 6 months, ive added a HMF full exhaust, Uni filter running with no lid, and a LEXX EFI programmer.

I've spent alot of time tuning and getting the settings right, which are just ever so slightly from what LEXX recommended for roughly what mods i have. and let me tell you it runs like crazy. There are very few quads that can even come close when me and my buddies race on the beaches. Banshees, 450rs, Raptor 660s and 700s, and quadzillas all fall short.

However, recently it is growing harder and harder to get started. It's not cold weather, bc its really not that cold and it is stored in my heated garage. I assumed it was the battery going bad, so i replaced it an nice AGM battery from my local ATV shop, and the issue was the exact same.

It stuggles to turn that huge motor over, and struggles and struggles, and eventually runs the battery down to the point where it just dies. However i have learned that if i turn the key on, wait for the injectors to rime or whatever the noise is to quit, try to start it, fails, turn key off and back on again, let the noise stop, and hit start, it usually fires right up.

Like i said, once started this thing runs perfect. But starting it just isnt easy anymore. I put in a brand new plug while i had the tank off to adjust the valves, i assumed that was the issue due to my research on here, however it made no changes. they were also not out of spec, but loosened and tightened to spec again just to be safe.

My last resort is put a new starter in it, thinking maybe its what is dragging, but ive tried holding the wires to the starter to see if they feel hot and they do not, ive checked the voltage under load, and the battery is showing 13.12V

I'm hoping the EHS guy will jump in and help bc he seems to know it all.

Any help please?!
 

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check the valve lash front right side valve
 

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Alright guys, im about at my wits end with this.

When i first got my 2008 700xx (used from original owner), it would fire up instantly. it was also completely stock.

Now that ive had it for about 6 months, ive added a HMF full exhaust, Uni filter running with no lid, and a LEXX EFI programmer.

I've spent alot of time tuning and getting the settings right, which are just ever so slightly from what LEXX recommended for roughly what mods i have. and let me tell you it runs like crazy. There are very few quads that can even come close when me and my buddies race on the beaches. Banshees, 450rs, Raptor 660s and 700s, and quadzillas all fall short.

However, recently it is growing harder and harder to get started. It's not cold weather, bc its really not that cold and it is stored in my heated garage. I assumed it was the battery going bad, so i replaced it an nice AGM battery from my local ATV shop, and the issue was the exact same.

It stuggles to turn that huge motor over, and struggles and struggles, and eventually runs the battery down to the point where it just dies. However i have learned that if i turn the key on, wait for the injectors to rime or whatever the noise is to quit, try to start it, fails, turn key off and back on again, let the noise stop, and hit start, it usually fires right up.

Like i said, once started this thing runs perfect. But starting it just isnt easy anymore. I put in a brand new plug while i had the tank off to adjust the valves, i assumed that was the issue due to my research on here, however it made no changes. they were also not out of spec, but loosened and tightened to spec again just to be safe.

My last resort is put a new starter in it, thinking maybe its what is dragging, but ive tried holding the wires to the starter to see if they feel hot and they do not, ive checked the voltage under load, and the battery is showing 13.12V

I'm hoping the EHS guy will jump in and help bc he seems to know it all.

Any help please?!
hello, try new spark plug.
 

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Sounds like a loose connection with a wire to me. Maybe a loose ground wire. How fast would the starter turn if you jumpered straight to the starter? I would also check the wire going from the regulator/rectifier to the starter selonoid to make sure it is tight.
 

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as stated above i put a brand new plug in when i adjusted my valves!!
Probably,
your chip,
change the signal too much,
and in engine ignition,
fuel /air ratio,
it's too much, fat,
just for test,
see if without lid of air filter,
engine starts well,
or, try decrease chip setting
 

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However i have learned that if i turn the key on, wait for the injectors to rime or whatever the noise is to quit, try to start it, fails, turn key off and back on again, let the noise stop, and hit start, it usually fires right up.

!

Sounds like you figured it out! The noise is the fuel pump priming. I always do this when cold starting, but instead of the key switch, I just hit the kill switch off to back on. If quad sits for a bit, it isn't uncommon for them not to turn right over. I generally always have to dbl prime mine when cold, and they haven't run for a week or so.
 

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Discussion Starter · #9 ·
Sounds like you figured it out! The noise is the fuel pump priming. I always do this when cold starting, but instead of the key switch, I just hit the kill switch off to back on. If quad sits for a bit, it isn't uncommon for them not to turn right over. I generally always have to dbl prime mine when cold, and they haven't run for a week or so.
Except this is also the case when i have been riding for a couple hours, if i shut off the quad, it will be a struggle to get it started up again.
 

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Does it hang when it tries to start, or just crank and not start?

Sent from my SAMSUNG-SM-G870A using Tapatalk
 

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Discussion Starter · #11 ·
Does it hang when it tries to start, or just crank and not start?

Sent from my SAMSUNG-SM-G870A using Tapatalk
So took it apart again, and check the spacing on the valves. With close attention to the exhaust side.

I think i made a rookie mistake when adjusting them before.

When adjusting you put your spacer in, turn the adjustment with a flat head, get it tight, and tighten the locking nut. however as i was readjusting i realized the force of the flat head sitting on the adjustment screw was throwing off the adjustment tightness. if that make sense, so instead i used my fingers to tighten the screw to the .008, then used the flat head to hold the screw in place while i tighted the lock nut, and sure enouugh she starts right up now. first push of the button.

To anybody with this same issue i hope how im explaining what i did wrong is making sense.
 

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Glad you figured it out!
 
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