HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
bbell05

why dose my right foot hurt "oh yeah is a 4 stroke"

12 posts in this topic

ok i have a 99 yz 400 with some mods the question is im getting anti freaze up through my sparkplug hole with the plug out. "head gasket"? "crack head" and i was checking for spark and you can barley see the spark some times it looks like there might not even have a spark. doin't know what it could be but my foot hurts!!!!

Share this post


Link to post
Share on other sites

get a pair of riding boots and kicking the bike over wont hurt so much. i'm not sure where the anti freeze goes in the engine but i would think thats its would be the base cylinder gasket or a cracked cylinder. sound like you will have to take it out of the engine and look. about the lack of spark try the easy things(cheap things) like check the connection in the sparkplug cap. try a new spark plug. if not have fun trying to fix it.

Share this post


Link to post
Share on other sites

As far as your coolant problem.... a head gasket is the only thing I can think of. However, 4 strokes are not hard to start if you have them jetted right. Mine will start on the 2nd or 3rd kick cold everytime and it will start on the first kick when hot.

With a 4 stroke you cant just start kicking you have to take your time, put it in neutral, find TDC, and then kick. I have found that 400's and 450's start easiest on a slow, full kick. 250F's tend to work better with a quick jab. (if that makes any sense)

Share this post


Link to post
Share on other sites

i agree with kawirider i dont have to work at all to start my 99 400 first kick cold without choke it starts right up. so make sure you pull the decomp lever in and get a good full kick and bring it all the way back up before you let off the decomp and then give a nice full kick. and it should fire right up

Share this post


Link to post
Share on other sites
"crack head" ...you can barley see the spark ... my foot hurts!!!!

Best post on this forum for ages... :thumbsup:

Seriously. I hope you sort it out quickly.

The foot thing is easy with proper boots.

The coolant in the chamber sounds worse. But I think you will have to take the head off to have a look.

Share this post


Link to post
Share on other sites

With a 4 stroke you cant just start kicking you have to take your time, put it in neutral, find TDC, and then kick. I have found that 400's and 450's start easiest on a slow, full kick. 250F's tend to work better with a quick jab. (if that makes any sense)

Thats probably true with the auto decomp 250fs, but the manual decomp 250fs need a full kick for them to light. Infact it takes just as much effort to start an 01-02 250f as it does a 426 :thumbsup:

Share this post


Link to post
Share on other sites

Can't help with the coolant but as for starting, Start smarter not harder!! I just got a '99 400 and the thing was a bear to start. First couple times I tried to ride it I almost couldn't 'cuz I was so tired from starting it and came home with a bruised foot. And I had the drill down cold! No amount of "find TDC, pull lever, blah blah," could help me. Then I got smart. I was checking out the ignition path, cleaned the leads on the coil, found out that the spark plug boot was loose and changed out my fouled plug. Thing started very next KICK! Swear it. I'm now a 1-2 kick start beliver.

So "Start smarter not harder"

Share this post


Link to post
Share on other sites
good advice

chillll doood, fine. I don't know about your coolant problem but try checking your spark plug gap or just changing out your plug. If you still don't get a good spark then check some of the electrical and connections. :thumbsup:

Share this post


Link to post
Share on other sites

i got oneal element boots , I got a 13 1/2 : 1 slug so i really high compresson ratio and My jetting a little on the lean side i can tell by a whiteish cast on the spark plug. Im taking the bike to a shop on friday and hopefully is not to bad.

Share this post


Link to post
Share on other sites
i got oneal element boots , I got a 13 1/2 : 1 slug so i really high compresson ratio and My jetting a little on the lean side i can tell by a whiteish cast on the spark plug. Im taking the bike to a shop on friday and hopefully is not to bad.

Good luck with the bike hope it turns out an easy fix.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0