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| MODIFYING 1980 CR 250 IGNITION https://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=21&t=1995 |
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| Author: | oldpromxr [ Tue Aug 19, 2008 9:01 am ] |
| Post subject: | MODIFYING 1980 CR 250 IGNITION |
As I recall, there was a trick to disable the rev limiter on the 1980 CR250 to allow them to rev out like the 78/79's. It involved cutting the green wire coming out of the source coil. Can anyone verify this or give me the proper way to do it? |
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| Author: | redrocket190 [ Tue Aug 19, 2008 3:09 pm ] |
| Post subject: | Re: MODIFYING 1980 CR 250 IGNITION |
I remember reading something the same "back in the day". Here's something to think on, though. The 1980 engine was changed to have more of a mid-range over the 1978 and 1979 engines. You may find that even though the engine can rev further, it's actually falling off and this will be counter-productive. What you can do is put a handlebar switch into the green wire circuit and see whether a) the engine will run with the wire broken and b) if yes, what effect it has out on the track. |
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| Author: | b-joe [ Wed Aug 20, 2008 4:12 pm ] |
| Post subject: | Re: MODIFYING 1980 CR 250 IGNITION |
if you have a wiring diagram you can see that the green cable is the electric ground. when you cut it the ignition doesn´t work or the electrical ions go thru the other green cable to the ground. 2t engines are often rev limited by the design of the exaust pipe. |
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| Author: | oldpromxr [ Tue Sep 02, 2008 9:00 am ] |
| Post subject: | Re: MODIFYING 1980 CR 250 IGNITION |
I found the article on modifying the ignitions. Sept 1980 Dirt bike mag. Mr Know it all,and I quote: "Some competitors have used the electronics for earlier model CRs. Also a trick on the earlier model 250s was disconnecting the rev limiter wire under the tank. It was green in color. All that needed to be done was simply to disconnect it from the electronics." He should know, after all he was" Mr Know it all". |
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