- Local time
- 7:45 AM
- Jul 3, 2021
Thanks for the ideas. I'm still not sure what it is. At this point I've moved on to a phantom 85 but they have been blowing up faster than I can put them in, so I put ol' reliable back in. I don't have any base gaskets for it, and so I have to use 2 head gaskets to clear the piston. I did some experiments on the cylinder, like removing the transfer bridge. It has really low compression for some reason and it's leaking from a couple spots but will still get up to 8k but then cuts out still.are you using an Rpm Tester,to see if this is the 9k? ( or Dino? )
Rpm Test with the Wire that Goes around the Spark Plug Wire if so , Make sure you Rap it around as much as you can .. ( even thought this is not going to fix your Problem .. But .. more raps of Wire will give a more accurate REading
ok , so Getting over 9k Rpms .. , try Putting a new Magnet in heat will kill that Magnet ( i assume you know this ) , but also, the Cdi box, have a capacitor in it ,, that Fill , and discharges .. it might not have time to be Building up That Capacitors, up fast Enuff to provide Them Rpms ... so there is a spark, but they're not Enuff Volts to Light all the Fuel air mix . ( some nas will let you know if its SPark ) .. So maybe Use a Cdi from a 2-stock Racing motorcycle (Crotchrocket ) or maybe try to Find a Bigger/stronger magnet. that cdi Going to Charge that Copasator Faster.. if its not spark ,, its a Balance in the crank , or the Air Flow is getting Bottle Necked .
GOod luck , not sure if any of this helped .. i know i hate it when someone post something i already know , or have Treid , good Luck And GOd bless ...