Starting problems crf250r

I have a 2008 crf250r. The bike has about 60-70 hrs on it, not very hard hrs mostly woods trails. The bike has always ran great. 2 weeks ago I rode about 60 mi of trails and probably started the bike 15-20 times that day with no trouble. Came home and washed bike. 1 week ago at the track, the bike started good 1st start cold. I warmed it up and about 1/2 hour later went to ride after track was prepped and it wouldn't start. I kicked till I couldn't 3 or 4 different times till it finally started. This happened for the 3-4 sessions that I rode. Came home and washed bike again. I took it out Thursday to see if I would have trouble. I did but got it to idle for a few seconds with no choke and gave it a lil throttle and it killed and hasn't started since. I cleaned airfilter, changed plug, and cleaned carb. All jets were clear, I tried to trace every circuit in carb and blow through and they seem clear. I even took mid section of carb apart and cleaned. It had some debris from the sealant used to put the o-ring on and cleaned it all. It still won't start. It fires 1 or 2 pops on almost every kick but won't start running. I have a friend with an identical bike that I will try to swop coil and ignition box. Any suggestions or direction would be greatly appreciated. Trying to get it running for an enduro this weekend. Thanks.

Check the valves.

I forgot to add in the post that I took the head off and the buckets and the rocker arm has a lil play so I would assume they aren't too tight. Didn't check exact clearances yet though. Could the valves still prevent it from starting if the buckets and rocker arm has play? (I'm obviously not a mechanic, just trying to learn)

yes hondas are known for valves and wont allow it to start because valves wont be able to open long enough in the engine to keep it running or if it does very poorly

Thanks I'll set valves within tolerance and post results.

 i suspect its your coil, if your coil was going it would be giving trouble when warm but after cooling down restart would be easy. confirm valve clearances and timing marks is what I would do and maybe check for water in your fuel.

when valves tighten up starting is tough cold but once running its good for the day- first start of the day may take a push start but don't do that

Edited by peaceofwork

Valves were too tight. Thanks for all the help and info. I read what seemed to be a very accurate jetting combo and starting procedure to save on the kicking, can anyone share the best set up and procedure for an '08 250?

Thanks again.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

    • By Brady The Honda Guy
      I recently put a newer style fender and plate on my 2007 crf250r. I just had to drill a couple holes in the fender and I used some washer on the back bolts to angle the fender up a bit. Since the original plate mounted with one bolt in the center and the newer styles mount with two bolts, I had to make a custom bracket. Message me if you need dimensions for this bracket. New style is in my cover photo, stock is in my profile picture.
    • By Brady The Honda Guy
      So I can get a 1986 cr250 motor for a good price and I also know a guy that has a 2005 crf250r that needs work. I have the idea of just swapping motors. Would this motor fit in the newer frame?
    • By Kevin from Wiseco
      Jeremy Martin Leads the Charge for Wiseco Riders at Daytona Supercross
      Christian Craig Turns in Career Best in 450 Competition
      MENTOR, Ohio (March 13, 2018) – Jeremy Martin showed the way for Wiseco-sponsored riders in Saturday night’s Monster Energy Daytona Supercross presented by Honda. In a season marred by bad luck and misfortune, Martin put together a near flawless ride to earn his first Eastern Regional 250SX Class podium finish of the season.
      Martin qualified eighth for the division’s annual visit to the World Center of Racing, finished fourth in his heat race, and came home second in the 250SX main event, missing his first win of the year by less than a second.

      “It’s Daytona, a real man’s track.” said Martin who sits fourth in points. “It was the toughest race of the year as far as fitness. I had to slow down a little bit, halfway through the main. I was getting close to (race winner) Jordon (Smith) and I was starting to think about where I could make a move on him, then I made some mistakes and he got away from me. Couldn’t quite get close again, but it’s good. We’re on the podium and in contention for wins again. That’s something I haven’t been able to say in supercross in a while. We want to get wins and now we know it’s coming.”
      Martin’s podium was a bright spot, but the rest of the event was rough for the GEICO Honda/Factory Connection squad. RJ Hampshire crashed hard in his heat race and had to be transported to a local hospital. He injured his back and ribs, but shoulder pain left him with the most concern.
      “I felt good on the bike all day,” said Hampshire via his Instagram account. “Had some pretty good speed and my foot just slid off hitting my shifter in those rollers during that heat race. After seeing the pictures from the crash I’m very thankful I didn’t take a shot to my head. I have some fractures in my T3/T4 in my back and ribs. Also have some damage to my lungs which is why I’ll be spending a couple nights in the hospital. I’ll be getting some more checkups this week on the shoulder also.”
      Cameron McAdoo, the third member of the team, was unable to compete at Daytona after being sidelined with a hand injury two races ago in Atlanta.
      Across the paddock, in the premier 450SX Class, Christian Craig got the call to fill in for Team Honda HRC. With the team’s regular riders Ken Roczen and Cole Seely out with injuries, it was up to Craig to carry the load for the factory team, and the upstart rider didn’t disappoint.
      The San Diego native was solid in both qualifying sessions, won his heat race and snagged the holeshot in the division’s main event. After relinquishing the lead to eventual winner Justin Brayton, Craig continued to show he was up for the challenge. The 26-year-old rider raced for second and third for most of the 20-minute-plus-one-lap feature before losing one more spot in the late goings to bring his No. 32 Honda CRF450R home fourth in the final rundown.

      “I had a great week testing with the team,” commented Craig. “They came down to Florida right after Atlanta and I feel like we really improved. Just getting more time on the bike and getting more comfortable was huge. I started off race day feeling really good. My qualifying position didn’t really show it, but overall I was happy with my riding. It’s all about having fun out there, and man, that’s what I did tonight. I was up front in the heat race, fell to third, but then the two guys in front took each other out so I ended up winning. You can call it luck or whatever, but I just put myself in a good position to capitalize on people’s mistakes."
      “I had a good gate pick and some confidence going into the main. I grabbed the holeshot and led for almost the first lap, but [Justin] Brayton got by me pretty quick. I stayed second for quite a while. I just rode my hardest and did my best. Unfortunately, a couple guys got by me so I ended up fourth. The track was so tough. This is only my second time racing Daytona and last year didn’t go well, so I really wanted to get some revenge this year. It’s better than the week before, but man, I was so close to a podium. I just need to keep putting myself in good positions and work on getting better each weekend.”
      Monster Energy AMA Supercross rolls on this weekend when the series visits the “Gateway to the West” for its annual race at the Dome at America’s Center in St. Louis. The 11th of 17 races on the 2018 supercross calendar will be televised live on FS1 Saturday, March 17, beginning at 8 p.m. Eastern Daylight Time, 5 p.m. Pacific.

    • By ThomasM.
      selling Hot Cams Valve Shim Kit that i bought for my 2005 crf250x, will also fit crf250r.
      used 1x 1.30 and 2x 1.55 shims. the rest is still there.
      $60usd shipped in the usa or canada
      please contact me for pictures or if you are not sure if it will fit your bike
    • By DirtRider250x
      Hi all,
      My main question is how can I make my 250r more reliable. I have owned it for 2 years and it was spent about 1 year in the shed probably needing new valves and piston rings (i have been putting it off) Will steel valves last longer and work well in the engine? Also, what are your thoughts of me selling it and buying something newer? is it worth it?