lt-r450 starting problem, please help

[98warriorboy]

ok, i own a 07 lt-r450 and when i try to start it, it cranks but wont start. i checked to see if it was firing and it is. when i roll it off it fires right up everytime, but it just wont start off the button. what is wrong?

[98warriorboy]

i would really appreciate any opinions.

[LTR450_#67]

Check your valves......Sounds like they could be out of tolerance. Make sure you change your air filter as often as needed.

I have also heard that maybe a low battery will make it act that way.

Aaron

[98warriorboy]

im pretty sure it aint the battery and i dont think it would be the valves becuase it brand new but ill clean the air filter and see wut i come up with, do you know of n e thing else i could check?

[cabex]

bad spark plug?

[tanner 222]

ya thats what i would guess

the other day with my '06 i went out, turned the key on, pulled in the clutch and pressed the start button and nothing happened ? didnt even try to roll over or nothing. i ripped it all apart, checked the fuses, igniton line, battery, everything. has this ever happened to anyone before ? is there something i missed to check ?

thanks,
tanner #222

[98warriorboy]

well, it cranks over perfect but it just wont start. like i said, it starts perfect everytime when u roll start it.

[QIKLTR]

if it starts while bump starting and not by the button i would say that your battry is to weak to crank the motor fast enough to start. also try starting in neautral maybe your clutch is dragging a bit.

[98warriorboy]

if i hooked it up to a car battery to crank it, would it hurt it?

[hondaracer31]

My buddies did this exact thing and it ended up needing a new cylinder and valves. You could try jumping it from a car, I've done with no ill effects.....

[98warriorboy]

well, i hope that it nuthin major cuz i dont really have the cash but thanx for you opinions and advice.somone told me that the valves might be tight.could that be it?

[LTR450_#67]

Did I not say check your valves in my first post or what? What did/does your airfilter look like?

Aaron

[98warriorboy]

its a lil dirty but nuthin major.

[CdaleXtreme]

Your intake valves are toast.

KEEP THAT FILTER Clean, and it should eliminate the problem, after you put fresh valves in.

[ltr450rider21]

sometimes mine wont start unless i give it just a very little gas, try that?

[98warriorboy]

how much would a full valve job cost?

[98warriorboy]

well, not a full valve job, just then intake valves. i just remembered that their is a little tear in the plug wire, i electrical taped it up, could that also be the problem?

[bluebyyouz]

Check the 4 wire connecter at the ignition switch. Various people have found random occuring problems with this connection. if it is found to be the problem cut out the connector and hard wire the switch it to the harness.

[98warriorboy]

if u r talkin about the key switch, there is only 3 wires.

[bluebyyouz]

Originally posted by 98warriorboy
if u r talkin about the key switch, there is only 3 wires.


Thats what happens when you post from work during night shift at 3 in the morning. Thanks for the correction.

i had this exact thing happen to me on a z400 i had and it was the valve were too tight, give them a look.

[98warriorboy]

i heard the same thing from a close freind of mine with his 450r, ill check into that. thanx for the opinions everyone.