2004 636 wont rev past 12000 rpm's

[ADBZ Matt]

Oh yeah, and i have just offically made the switch over to stunt ride from SL...

OK here is my problem: (copy/Paste from SL)

Took the filter completely out thinking that it may be a clogged filter...

Changed my Clean air mod tube (was a bit flimsy, and thought maybe it was vacuuming closed)

Checked for air leaks all over the engine, and found nothing...

Have swapped fule to make sure it wasnt bad gas, and I ran fule systemes cleaner through the bike several times....

It pulls good on idle... It is hitting on all 4 cylinders, but for some reason its acting like 12000 RPMs is redline, and wont go over it???

The bike has 5000 original miles on it, and I recently changed the oil... I have no clue what it could be...

Oh yeah, and i changed the plugs about 5 months ago...


It will clutch up sit downs, and ss, but no tank stuff... it just bogs and fails!

Any help or ideas would be greatly appreciated.... Also the FI light is not on???

Quote:
Originally Posted by MikeM
does the rev limiter come on or it just wont go that high?

It sounds just the same as bouncing off the rev limiter, if its in neutral, and I just grab a hanfull of throttle it will go right past 12000 rmps, and straight to the rev limiter, but if in gear and trying to roll endos, or in a wheelie or just trying to get it to go past 12 grand... it wont do it...

Also if i put it in neutral and roll it up slowly, it wont go past 12000...

I am confused.... will spark plugs cause this if they are going bad? they are not that old, but i did loop an endo... but i have the clean air mod... so that shouldnt matter... I always thought spark plugs were either good or bad... will they not spark past a certain RPM if going bad???

Thannks in advance

[MVSBrendon]

Did you check all the connections at the throttle bodies? Is there a fuel filter/screen that could be clogged?

[ADBZ Matt]

Nope, but i will check it... any other ideas?

[ADBZ Matt]

Anyone else got any ideas?

[MVSBrendon]

Originally Posted by AdrenalineBoyz

Can you be more specific as to what this screen looks like and where i might find it?

http://www.zxforums.com/forums/zx-6r...el-filter.html

[MVSBrendon]

Should be the same on our year bikes....

[ADBZ Matt]

I have another fuel pump I could try if need be...

[MVSBrendon]

Just sounds like a fuel starvation problem....

[old man roger]

5 months ago when you put plugs in it did you get the iridium plugs or the cheap ones ? if you got the cheap ones that could be your problem ,they dont last nearly as long as the good ones...

[MVSBrendon]

Originally Posted by old man roger

5 months ago when you put plugs in it did you get the iridium plugs or the cheap ones ? if you got the cheap ones that could be your problem ,they dont last nearly as long as the good ones...

You think he'd get that much electrode erosion in 5 months? I ran 3 seasons on i set of plugs.

But pull the plugs and take a look at them, even if their still in good shape, then could give you some indications of what's going wrong inside.

Check this link
http://www.gnttype.org/techarea/engine/plugs.html

[Mr. Farley]

Pulling the plugs will give you a good idea of what your engine is doing. Lean, rich, starving... whatever.

[old man roger]

Originally Posted by MVSBrendon

You think he'd get that much electrode erosion in 5 months? I ran 3 seasons on i set of plugs.

But pull the plugs and take a look at them, even if their still in good shape, then could give you some indications of what's going wrong inside.

Check this link
http://www.gnttype.org/techarea/engine/plugs.html

lugging around on idle alot like we do could foul out a cheap set of plugs in 5 months not saying thats definitely his problem but it could be

[ADBZ Matt]

I put in the NGK EK plugs.. which were the split fire.. non irridium's I wont pay that kind of cash for irridiums... but i will try and change my plugs...

[Mr. Farley]

I just hate changing plugs, so I'd rather spend the $$$ to get nice plugs that I don't have to change.

[old man roger]

if you dont get the iridiums you are wasting your money because they last so much longer than the regular plugs

[ADBZ Matt]

Just bought these:

http://cgi.ebay.com/ebaymotors/ws/eB...m=230349733506

[old man roger]

wow thats cheap for iridiums ..good find

[ADBZ Matt]

Lets hope they are not used... haha

[old man roger]

Originally Posted by AdrenalineBoyz

Lets hope they are not used... haha

i

[old man roger]

be sure to check the gap too , i know people always say they come pregapped but even if they are pregapped they get bounced around alot so just double check it