baddad Posted September 15, 2005 Share Posted September 15, 2005 Bought a 1990 dt125r for my son to get about on, have deristricted it and fully opened the powervalve. Bike seems to missfire about 7k? anybody got any ideas why this is happening and how to fix it? Many thanks Link to comment Share on other sites More sharing options...
Admin Alex Posted September 15, 2005 Admin Share Posted September 15, 2005 Have you tried with a new plug? Link to comment Share on other sites More sharing options...
baddad Posted September 16, 2005 Author Share Posted September 16, 2005 yeah got new plug in and now cleaning out exhuast and putting new exhaust gasket in, still has me baffled though. Might try a hotter plug as it seems to get better as it gets warmer, also its a pig to start??? Link to comment Share on other sites More sharing options...
rf9rider Posted September 16, 2005 Share Posted September 16, 2005 Was it running ok before you desrestricted it and altered the powervalve? Link to comment Share on other sites More sharing options...
baddad Posted September 18, 2005 Author Share Posted September 18, 2005 Not really but as it was restricted it peaked at about 7k so i thought the missfire was probably due to the restriction? Link to comment Share on other sites More sharing options...
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