No spark!!!! XR80 point gap?


7 replies to this topic
  • TakinaDirtNap

Posted 19 February 2005 - 08:21 AM

#1

I have gone round and around with this XR :)

I put a test light on the wire from the stator under the tank and I get a dim light while kicking it over. I am not sure if the test light is a good test for the stator but I am not sure how to test it.
Should I get a ohm reading while kicking it over?

I had the coil tested at the shop and they say its good. The spark plug gap reads 2 ohms so the shop says thats okay.

I bought the points so I guess I should change the points? Anyone know what the point gap is supposed to be for the 85 XR80? How about the plug gap?

Its looks like I need to buy a service manual for this restoration any recomendations ?

thx

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  • colemanapp

Posted 19 February 2005 - 10:11 AM

#2

I finally broke down and bought a Clymer manual for my kids 86 xr 80. Point gap is .3-.4mm(.012-.016 inches), spark plug gap is .6-.7 mm(.024-.028 inches). The manual covers 1975-2003 models and xr75-xr100 models. Looks like its worth the $28.
Bob

  • TakinaDirtNap

Posted 19 February 2005 - 03:49 PM

#3

I finally broke down and bought a Clymer manual for my kids 86 xr 80. Point gap is .3-.4mm(.012-.016 inches), spark plug gap is .6-.7 mm(.024-.028 inches). The manual covers 1975-2003 models and xr75-xr100 models. Looks like its worth the $28.
Bob



Super thanks Bob!! I will be inivestin in a manual for sure.

Anyone know how to test the signal from the points/stator? I was told the test light is not the way should test?

  • dirtbkr188

Posted 19 February 2005 - 04:58 PM

#4

The test light only indicates that you have some spark coming from the stator. Holding the spark plug by the coil wire boot, and touching the engine with the plug (to create a ground), while you hand kick the bike over, will indicate the strength of the spark. A nice fat blue spark will usually indicate a good spark, and a dim, weak looking spark, is just that...weak.
A new set of points, properly gapped, will improve your spark, provided your stator is okay.
As colemanapp stated, getting a Clymer Manual is the best investment you can make.

  • TakinaDirtNap

Posted 19 February 2005 - 08:10 PM

#5

:) Thanks guys!!! ITs ALIVE ITS ALIVEEEEE!!!!!! :)

new points got me spark and cleaned the carb and she lit right up. While it runs okay it seemed down on power.

I pulled the exhaust off to do a little clean up and it looks like its got a carbon layer about 1/8' think all around the exaust pipe and coming out the head. Any suggetions for clearing this out?

Thx

  • TakinaDirtNap

Posted 19 February 2005 - 09:07 PM

#6

Cool thx--how do you get the carbon out of the exhaust port?

  • dirtbkr188

Posted 20 February 2005 - 05:33 AM

#7

When you're due to put in a new top end, have the shop or dealer glassbead the head assembly for you. You will need to disassemble the valves, springs, keepers, rockers, etc, and strip it down for them, but it will save you money, doing it yourself.
If you prefer to have the shop do everything, they will lap the valves in, and reassemble everything for you.

  • TakinaDirtNap

Posted 20 February 2005 - 08:14 AM

#8

When you're due to put in a new top end, have the shop or dealer glassbead the head assembly for you. You will need to disassemble the valves, springs, keepers, rockers, etc, and strip it down for them, but it will save you money, doing it yourself.
If you prefer to have the shop do everything, they will lap the valves in, and reassemble everything for you.



Thanks dirtbikr188--





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