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
MonK_E

odd problem

16 posts in this topic

some times my 99 WR400 will take about 15 kicks to start it and then it will not pick up any revs, like a total bog it just will not come of idle. also the header starts to heat up and glow in a matter of seconds. other times it will start first or second kick and run great.

i have a JD kit and im using the blue needle on the 3rd position, 170 main jet and a standard pilot jet.

i also just put on a CRD pipe, the engine has just been rebuilt and i have checked the cam timing and it is spot on.

it seems like something to do with the ignition but i don't really have a clue, it could be any thing.

i have gone through the bike and checked every thing i could think of and come up with nothing. i hope you guys can help

thanks Simon

Share this post


Link to post
Share on other sites

It may be the igntion CDI box. If it runs well sometimes and not others the CDI unit maybe failing. :)

Share this post


Link to post
Share on other sites

yeah i have striped the carb cleaned it and checked it out every think seems ok

i hope it is not the CDI because they cost so much. does any one know if or how you can check the CDI.

Share this post


Link to post
Share on other sites

exhaust valves hanging up?

I don't think you can check the CDI. THe best thing is to swap CDI's w/ someone (even put yours on their bike as well).

I JUST SOLD my OEM CDI for $50.00( :)?)

Share this post


Link to post
Share on other sites

it doesn't seem like the exhaust valves because it only happens some times not all the time.

i also don't think it is the CDI any more because i think if there is a problem with it, it wouldn't run at all.

so im back to square one and im clue less :)

Share this post


Link to post
Share on other sites

it doesn't seem like the exhaust valves because it only happens some times not all the time.

>> it may not be ALL the time.

Share this post


Link to post
Share on other sites

Just a thought here, but everytime I park the bike for any lenght of time I always push the kickstart lever till the bike is at TDC so all of the valves are in the closed and relaxed position. If the engine sits with the valves open during the week it could hang a valve open , especially if the bike is getting older. My .02 -- WR Dave.

Share this post


Link to post
Share on other sites

my old man says that it can't be the valves sticking because the engine would still pickup some revs if they are hanging. we think i could be the ignition pickup has gone wrong somehow and made it to retarded. but i don't think there is any adjustment on the pickup so im not sure what to do. i don't know how to check it and i don't have a flywheel puller/remover. :)

any help will be greatly appreciated because im going insane trying to figure this out.

thanks. :D

Share this post


Link to post
Share on other sites

I would take a look at the insulation on the wiring of the bike,being an older machine it is quite possible that you are getting a short in the ignition circut wiring from wires rubbing against the frame work and exposing a wire some where(or a break in the wiring due to repeated bending turning or pulling forces on the wiring)incluiding the kill switch wires,try a multi meter on the circuts whilst turning the bars and twisting the connectors and wires to see if you get any change,i know of a two stroke that did a similar thing recently due to a wire lightly grounding against the frame!

Share this post


Link to post
Share on other sites

I'd run the bike for about 10 min on a batch of 2 stroke at about 50:1 (I use an old fork oil bottle, the tip fits nicely in the fuel hose on tyhe carby). If you have a sticky valve, this should cure it. If you have access to a leak down tester, I'd use it to see if it's compression related. I'd also check the resistances of the stator. Had a similar problem with the 250 2 smoke, turned out to be a crook stator.

Hamish

Share this post


Link to post
Share on other sites

i have checked out the ignition coil and stator, there was nothing wrong with them so this morning i took the bike to the shop and they said it was the woodruff key and it had broken so the flywheel has slipped and is causing the problem. hopefully ill get the bike back on Tuesday or Wednesday.

Share this post


Link to post
Share on other sites

i think the problem was caused by faulty workmanship, or something like that. i think they did not torque it up properly when they rebuilt the engine that's why they are doing the repair for free :D or im there best customer because they don't get much business and i just bought 2 bikes and about 2000 Euros worth of parts from them. :)

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