Jump to content
Sign in to follow this  

XR 250 won`t start

Recommended Posts

My mates 250 will not start.

 

It ran fine when he last run it about 6 weeks ago and then put it in the shed.

 

Carb all cleaned out and fuel getting to the chamber.

 

BUT no spark at the plug, but getting a spark at the end of the HT lead.

 

Changed 2 different caps and 2 different plugs but still no spark at the plug !!

 

Is he missing something ????. 

 

Can a weak spark get to the end of the HT lead but struggle to get to the plug ?

 

Any ideas pls.

 

Bob.

Share this post


Link to post
Share on other sites

I've heard this before. carb cleaned, all except for pulling the fuel screw. If you didn't do that , you didn't clean it and bike will be difficult to start.

 

Depends of how he's checking for a spark.

 

 

My mates 250 will not start.

 

It ran fine when he last run it about 6 weeks ago and then put it in the shed.

 

Carb all cleaned out

Share this post


Link to post
Share on other sites

I've heard this before. carb cleaned, all except for pulling the fuel screw. If you didn't do that , you didn't clean it and bike will be difficult to start.

 

Depends of how he's checking for a spark.

Fuel screw has been out and all cleaned.

Share this post


Link to post
Share on other sites

XRs have a tiny spark. This is normal.  

 

I wonder if you have a ground problem or corroded kill switch.

Share this post


Link to post
Share on other sites

XRs have a tiny spark. This is normal.  

 

I wonder if you have a ground problem or corroded kill switch.

Not to sure it`s just strange that you can get a spark from the bare HT lead when grounded to any part of the engine but not when there`s a cap and plug attached.

Share this post


Link to post
Share on other sites

Not to sure it`s just strange that you can get a spark from the bare HT lead when grounded to any part of the engine but not when there`s a cap and plug attached.

 

OK, there's a resistor inside the cap.  Unscrew internal tip with screwdriver.  You can clean the contacts with muriatic acid and Q-tip.  Rinse with water.  Also replace resistor with brass, copper, or stainless bolt same size.  There's a spring in there, too.

Edited by Baja Rambler

Share this post


Link to post
Share on other sites

OK, there's a resistor inside the cap.  Unscrew internal tip with screwdriver.  You can clean the contacts with muriatic acid and Q-tip.  Rinse with water.  Also replace resistor with brass, copper, or stainless bolt same size.  There's a spring in there, too.

 

Thanks for your reply.

 

We`ve done all that you have suggested and have tried a few different caps but still no spark at the plug. 

Share this post


Link to post
Share on other sites

You can cut a 1/4" off the end of the plug wire where it screws into the cap so the cap screws into fresh wire.

Share this post


Link to post
Share on other sites

Check all your electric. sometimes he kill switch can go bad and stay in the normally closed position not allowing it to keep the electric flowwing. take the gas tank off and check to make sure both leads are still connected to the selonoid.

Share this post


Link to post
Share on other sites

:thumbsup:

 

Just to let you guys know it ended up being  the coil.

 

Now the bike starts and runs better than ever before.

 

Cheer`s Bob. 

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

Reply with:

Sign in to follow this  

×