[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

[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