wr 450

41 replies to this topic

Posted February 23, 2003 - 12:53 PM


picked up my 450 also my first yamaha installed 215 jet, modfid the box, removed stop in carb runs strong now and ready to race.

  • timvv51

Posted February 23, 2003 - 02:54 PM


Hi: I am still trying to get all these numbers straight on what is a new carb for me. Which jet is a 215 jet needle refering to, I know its not the main or the pilot or I dont think the starter jet either. Is it an alternet needle? Why did you choose it and what is your altitude that requires it. Tim


Posted February 23, 2003 - 05:08 PM


The 215 is the main jet and I'M about 1000ft to get this jet to work pull your restricter out of the muffler and unplug your air box, mine was profesionally sat up for me and it cost me about $140.00

  • ThumperWR450F

Posted February 23, 2003 - 05:28 PM


do you have an airfilter hooked directly to your carb?

  • tad69

Posted February 23, 2003 - 05:34 PM



215 jet


Damn! I mean Damn!!! :D

  • timvv51

Posted February 23, 2003 - 05:45 PM


Hi: See, thats what I mean. Never heard of a Kehien Carb. that took a 215 main jet. Course I am surley no expert myself, but the main jet is usually the easiest one to dial in. My bike came with a manual and an extra pilot and main jet and I went to the corner shop and went up one more jet size to a 158, our altitude is 3500. Most people are using 155 158 or 160 or a few 165s but no 215s. That would be a gas guzzlin dude. Tim


Posted February 24, 2003 - 01:37 PM


Tim what have you done to your bike sofar, maybe I can help you and tell what I have done to mine.


Posted February 24, 2003 - 02:39 PM


I had the restrictor removed from the air box and the pipe.

  • timvv51

Posted February 24, 2003 - 05:16 PM


Hi LUV: Your pullin my leg right. Its either that or someones pullin yours. Go to page 7-8 in the service manual and you will see that a 215 mainjet is not even in the ballpark for a WR450. Thanks for the offer of help, but bike is runnin great. I was just hearing some odd numbers that didnt figure up and a quick look at the manual enlightened me. Tim


Posted February 25, 2003 - 03:36 PM


Tim, nobodys pulling nobodys leg. My bike has a 215 jet with throttle stop out, snorkle out and it screams. If your going to go by the manual you will be riding a pig. The fastest way to tell if your jet is right is run your bike down the road about two miles real fast. Kill it before it reaches idle and then pull the plug. If it is brown its what you want. You should do this in the summer and winter. Black plugs mean carbon build up over time. My bike has no hestitation and no bogs. The only problem I have is keeping the front wheel on the ground. Good luck to you. Steve

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  • WR250fla

Posted February 25, 2003 - 04:54 PM


Wheres Taffy when ya need him?


Posted February 26, 2003 - 03:01 AM


Not here.

  • endurodog

Posted February 26, 2003 - 03:57 AM


A 60 is about stock and has an opening about like this " . " A 215 would have an opening about like " O ". Now are we talking main jets here or what jet?

  • beezer

Posted February 26, 2003 - 05:10 AM


I think someone is confused here. A 215 jet would have an opening the size of a sewer pipe.

  • ddialogue

Posted February 26, 2003 - 05:32 AM


I agree with Endurodog and Beezer...215 is huge! Are you sure it's a 215 and not a 152? We are talking about main jets, right?

  • TDog

Posted February 26, 2003 - 07:29 AM


And the saga/controversy/continues. I have a 155MJ (160 is on back order),48PJ, snorkle removed, grey wire mod and my happy arse is headin for Florida for the first GNCC in Palatka. I am not touching another thing. I've spent more time in the carb than I have on the seat. It's time to ride!!! Can any Mullet out there say "HELL YEH"?!

  • beezer

Posted February 26, 2003 - 08:20 AM


I don't buy jets. I use a numbered drill set and a micrometer. I have better things to do than wait for a pimply faced teenager to get his finger out of his nose and look up a jet that I know is out of stock.

My garage is nice and peaceful, it helps me hold on to what little sanity I have left.

By the way a #77 drill equals a #48 pilot and a 1/16 drill equals a #160 main jet.

  • timvv51

Posted February 26, 2003 - 01:09 PM




Posted February 26, 2003 - 02:41 PM



  • tad69

Posted February 26, 2003 - 02:51 PM


215 sounds more like a MAJ.


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