I have a 98 Cr 125 and I really enjoy riding it. When i first got the bike I fouled plugs left and right and then my friend jetted the bike for me. It worked great. But now again the same problem has started again and also when i quickly accelerate the bike goes then suddenly boggs down. If i gradually gve it gas their is no problem but that quick throttle gives me a problem. Any ideas on how to solve this problem?