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08 crf450r

Posted: Tue Dec 13, 2011 9:50 pm
by marley25
Does anyone have any recommended jetting specs for my 08 450r with a full MRD exhaust, every thing else is stock..... And what is the general opinion of the MRD system????? Thanks

Posted: Tue Dec 13, 2011 10:57 pm
by crfsonly
check the jetting database in the 450R forum:

http://www.crfsonly.com/forum/viewtopic.php?t=13469

many are using, including myself, the JD Jetting Kit we offer. others have found a working combination with either a new needle or the stock needle.

ken