Best Bike Upgarde for Teen Son
  • nedirtbikr
    Posts:1261
    Joined:Thu Jan 06, 2005 12:28 pm

    by nedirtbikr » Mon Apr 02, 2007 7:46 pm

    CRF230dad wrote:One guy told me he runs his 2003 CR250 at 60:1 and the bike runs fine. I'm no mechanic but what should I be looking for?
    I did a bunch of research, visited with a dealer, and talked with about 100,000 people (or so :) .) The overwhelming answer I got was 40:1. That's what I run in a KTM 200MXC and it's been just dandy.
    2006 CRF450R (For Sale)
    A-47753 (Jumpin' dirt and clouds!)
    Proud member of the Hamster Nation!
  • User avatar
    acjjkamp
    Posts:666
    Joined:Fri May 19, 2006 11:04 am

    by acjjkamp » Tue Apr 03, 2007 12:20 pm

    ^^ Ditto.

    we run 40:1 in the CR125
    Al


    '06 CRF450X
    '05 CR125R
    and one blue...
    '94 YZ250
  • User avatar
    124
    Posts:3704
    Joined:Wed Feb 16, 2005 1:37 pm

    by 124 » Tue Apr 03, 2007 12:53 pm

    40:1 is fine. My preference was always 32:1. Sounds like the bike is running rich (fuelwise) though. If you have oil spewing out everywhere, you're probably a little fat in the jetting. Just be careful on who rides it with all that oil built up in the silencer though. A funny story:

    We're up north (Michigan) riding at my cabin. I'm sitting on the porch have a water listening to the buzz of a couple buddies riding in the sand pit across the street. We had just gotten back from a 35 mile loop. One of my friends comes back complaining about his bike "bogging when he tries to hit the gas hard".

    He says, "take it for a spin, let me know what you think." In my group, I'm the resident fast guy and wrench.
    So I say "no problem." Throw my helmet on and take it across the street. A small sandpit with moderately deep sand. It's like the area where you "warm up the chain" before heading out. Anyway, I ride the snot out of it for about 4-5 minutes. I roll back, lean it against a tree saying:
    "Dude, this bike rips, not sure what you're talking about." It's right about then that I notice the smell. It seems that his ability does not allow him to really rev the bike and sustain high RPM's for very long because his silencer is practically on fire. Billowing smoke rolling out of the silencer. The oil and carbon that had built up from him putting along (as I call it :lol: ) had nearly caught fire after I ran the bejesus out of it. We had a fire extinguisher handy because we really thought it was on fire! Anyway, maybe you had to be there...

    Sorry for the long response on the agreement of 40:1!! \:D/
    70' Honda CT70 (Trail 70; Gold)
    16' KX450
    16' KX85
    12' YZ125

Who is online

Users browsing this forum: No registered users and 2 guests