Kfxrider90 Posted March 25, 2010 Just bought an 02 cr250 bored out to a 280 with a fatty pipe and another fmf exhaust on it, im not sure about the jetting as he got the back for a trade from a guy who owed him money.The seller hadn't even started it in over a year. It started on the 3rd kick, but he doesnt remember what fuel/oil ratio he used. Help please? 👍 Share this post Link to post Share on other sites
KcDavis My Ride Posted March 25, 2010 32:1 is always a safe place to get started. That is usually what the manual calls for. But everyone will have a different idea of what is necessary and what is over kill. Really, just pick a ratio and jet accordingly, because that will be the real deciding factor. Share this post Link to post Share on other sites
ridesblue1 Posted March 25, 2010 i use 40:1 with all bikes i owned..would love a ride report Share this post Link to post Share on other sites
pieplatesnductape Posted March 25, 2010 The factory owners maintenance manual specs 20:1 using Honda oil or equiv. The Honda service manual specs 32:1. Most synth's are between 32:1 and 40:1, pick your fav oil and jet to the oil mfg's spec Share this post Link to post Share on other sites
HrcRacing Posted March 25, 2010 32:1 is fine for a 250 and it's also fine for a 500, it will be fine for your 280. 👍 Share this post Link to post Share on other sites
Kfxrider90 Posted March 26, 2010 Alright thankyou guys, And to the the guy who who wanted the ride report. I will try and do that. Just going to give it a good service saturday dumping all the fluid and check everything over and put on some new sprockets.Then I'll ride it. All ive done so far is about.5 mile to make sure it went through all the gears and that brakes worked. Share this post Link to post Share on other sites
